| Age | Commit message (Collapse) | Author |
|---|
|
blkg_lookup() checks whether the target queue is bypassing and, if
not, calls __blkg_lookup() which first checks the lookup hint and then
performs radix tree walk. The operations upto hint checking are
trivial and there are many users of this function. This patch inlines
blkg_lookup() and the fast path part of __blkg_lookup(). The radix
tree lookup and hint update are now in blkg_lookup_slowpath().
This will help consolidating blkg handling by easing moving root blkcg
short-circuit to inlined lookup fast path.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Arianna Avanzini <avanzini.arianna@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
|
|
Each active policy has a cpd (blkcg_policy_data) on each blkcg. The
cpd's were allocated by blkcg core and each policy could request to
allocate extra space at the end by setting blkcg_policy->cpd_size
larger than the size of cpd.
This is a bit unusual but blkg (blkcg_gq) policy data used to be
handled this way too so it made sense to be consistent; however, blkg
policy data switched to alloc/free callbacks.
This patch makes similar changes to cpd handling.
blkcg_policy->cpd_alloc/free_fn() are added to replace ->cpd_size. As
cpd allocation is now done from policy side, it can simply allocate a
larger area which embeds cpd at the beginning.
As ->cpd_alloc_fn() may be able to perform all necessary
initializations, this patch makes ->cpd_init_fn() optional.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Arianna Avanzini <avanzini.arianna@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
|
|
* Rename blkcg->pd[] to blkcg->cpd[] so that cpd is consistently used
for blkcg_policy_data.
* Make blkcg_policy->cpd_init_fn() take blkcg_policy_data instead of
blkcg. This makes it consistent with blkg_policy_data methods and
to-be-added cpd alloc/free methods.
* blkcg_policy_data->blkcg and cpd_to_blkcg() added so that
cpd_init_fn() can determine the associated blkcg from
blkcg_policy_data.
v2: blkcg_policy_data->blkcg initializations were missing. Added.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Arianna Avanzini <avanzini.arianna@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
|
|
The newly added ->pd_alloc_fn() and ->pd_free_fn() deal with pd
(blkg_policy_data) while the older ones use blkg (blkcg_gq). As using
blkg doesn't make sense for ->pd_alloc_fn() and after allocation pd
can always be mapped to blkg and given that these are policy-specific
methods, it makes sense to converge on pd.
This patch makes all methods deal with pd instead of blkg. Most
conversions are trivial. In blk-cgroup.c, a couple method invocation
sites now test whether pd exists instead of policy state for
consistency. This shouldn't cause any behavioral differences.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
|
|
With the recent addition of alloc and free methods, things became
messier. This patch reorganizes them according to the followings.
* ->pd_alloc_fn()
Responsible for allocation and static initializations - the ones
which can be done independent of where the pd might be attached.
* ->pd_init_fn()
Initializations which require the knowledge of where the pd is
attached.
* ->pd_free_fn()
The counter part of pd_alloc_fn(). Static de-init and freeing.
This leaves ->pd_exit_fn() without any users. Removed.
While at it, collapse an one liner function throtl_pd_exit(), which
has only one user, into its user.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
|
|
A blkg (blkcg_gq) represents the relationship between a cgroup and
request_queue. Each active policy has a pd (blkg_policy_data) on each
blkg. The pd's were allocated by blkcg core and each policy could
request to allocate extra space at the end by setting
blkcg_policy->pd_size larger than the size of pd.
This is a bit unusual but was done this way mostly to simplify error
handling and all the existing use cases could be handled this way;
however, this is becoming too restrictive now that percpu memory can
be allocated without blocking.
This introduces two new mandatory blkcg_policy methods - pd_alloc_fn()
and pd_free_fn() - which are used to allocate and release pd for a
given policy. As pd allocation is now done from policy side, it can
simply allocate a larger area which embeds pd at the beginning. This
change makes ->pd_size pointless. Removed.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
|
|
When a policy gets activated, it needs to allocate and install its
policy data on all existing blkg's (blkcg_gq's). Because blkg
iteration is protected by a spinlock, it currently counts the total
number of blkg's in the system, allocates the matching number of
policy data on a list and installs them during a single iteration.
This can be simplified by using speculative GFP_NOWAIT allocations
while iterating and falling back to a preallocated policy data on
failure. If the preallocated one has already been consumed, it
releases the lock, preallocate with GFP_KERNEL and then restarts the
iteration. This can be a bit more expensive than before but policy
activation is a very cold path and shouldn't matter.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@fb.com>
|
|
Since ec13b1d6f0a0 ("blkcg: always create the blkcg_gq for the root
blkcg"), a request_list always has its blkg associated. Drop
unnecessary rl->blkg NULL test from blk_put_rl().
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
|
|
The following tracepoints are updated to report the cgroup used during
cgroup writeback.
* writeback_write_inode[_start]
* writeback_queue
* writeback_exec
* writeback_start
* writeback_written
* writeback_wait
* writeback_nowork
* writeback_wake_background
* wbc_writepage
* writeback_queue_io
* bdi_dirty_ratelimit
* balance_dirty_pages
* writeback_sb_inodes_requeue
* writeback_single_inode[_start]
Note that writeback_bdi_register is separated out from writeback_class
as reporting cgroup doesn't make sense to it. Tracepoints which take
bdi are updated to take bdi_writeback instead.
Signed-off-by: Tejun Heo <tj@kernel.org>
Suggested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@fb.com>
|
|
Add a function to determine the path length of a kernfs node. This
for now will be used by writeback tracepoint updates.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jens Axboe <axboe@fb.com>
|
|
wb's (bdi_writeback's) are currently keyed by memcg ID; however, in an
earlier implementation, wb's were keyed by blkcg ID.
bdi_for_each_wb() walks bdi->cgwb_tree in the ascending ID order and
allows iterations to start from an arbitrary ID which is used to
interrupt and resume iterations.
Unfortunately, while changing wb to be keyed by memcg ID instead of
blkcg, bdi_for_each_wb() was missed and is still assuming that wb's
are keyed by blkcg ID. This doesn't affect iterations which don't get
interrupted but bdi_split_work_to_wbs() makes use of iteration
resuming on allocation failures and thus may incorrectly skip or
repeat wb's.
Fix it by changing bdi_for_each_wb() to take memcg IDs instead of
blkcg IDs and updating bdi_split_work_to_wbs() accordingly.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@fb.com>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup into for-4.3/blkcg
|
|
This allows cgroup subsystems to use a different name on the unified
hierarchy. cgroup_subsys->name is used on the unified hierarchy,
->legacy_name elsewhere. If ->legacy_name is not explicitly set, it's
automatically set to ->name and the userland visible behavior remains
unchanged.
v2: Make parse_cgroupfs_options() only consider ->legacy_name as mount
options are used only on legacy hierarchies. Suggested by Li
Zefan.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: cgroups@vger.kernel.org
|
|
It's pretty unusual to have an int as a private data field and it
makes it impossible to carray a pointer value through it. Let's make
it an unsigned long. AFAICS, this shouldn't break anything.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
|
|
Traditionally, each cgroup controller implemented whatever interface
it wanted leading to interfaces which are widely inconsistent.
Examining the requirements of the controllers readily yield that there
are only a few control schemes shared among all.
Two major controllers already had to implement new interface for the
unified hierarchy due to significant structural changes. Let's take
the chance to establish common conventions throughout all controllers.
This patch defines CGROUP_WEIGHT_MIN/DFL/MAX to be used on all weight
based control knobs and documents the conventions that controllers
should follow on the unified hierarchy. Except for io.weight knob,
all existing unified hierarchy knobs are already compliant. A
follow-up patch will update io.weight.
v2: Added descriptions of min, low and high knobs.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Li Zefan <lizefan@huawei.com>
Cc: Peter Zijlstra <peterz@infradead.org>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:
"This update contains:
- the manual revert of the SYSCALL32 changes which caused a
regression
- a fix for the MPX vma handling
- three fixes for the ioremap 'is ram' checks.
- PAT warning fixes
- a trivial fix for the size calculation of TLB tracepoints
- handle old EFI structures gracefully
This also contains a PAT fix from Jan plus a revert thereof. Toshi
explained why the code is correct"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mm/pat: Revert 'Adjust default caching mode translation tables'
x86/asm/entry/32: Revert 'Do not use R9 in SYSCALL32' commit
x86/mm: Fix newly introduced printk format warnings
mm: Fix bugs in region_is_ram()
x86/mm: Remove region_is_ram() call from ioremap
x86/mm: Move warning from __ioremap_check_ram() to the call site
x86/mm/pat, drivers/media/ivtv: Move the PAT warning and replace WARN() with pr_warn()
x86/mm/pat, drivers/infiniband/ipath: Replace WARN() with pr_warn()
x86/mm/pat: Adjust default caching mode translation tables
x86/fpu: Disable dependent CPU features on "noxsave"
x86/mpx: Do not set ->vm_ops on MPX VMAs
x86/mm: Add parenthesis for TLB tracepoint size calculation
efi: Handle memory error structures produced based on old versions of standard
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull ftrace fix from Steven Rostedt:
"Back in 3.16 the ftrace code was redesigned and cleaned up to remove
the double iteration list (one for registered ftrace ops, and one for
registered "global" ops), to just use one list. That simplified the
code but also broke the function tracing filtering on pid.
This updates the code to handle the filtering again with the new
logic"
* tag 'trace-v4.2-rc2-fix3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
ftrace: Fix breakage of set_ftrace_pid
|
|
Pull MTD fixes from Brian Norris:
"Two trivial updates. I meant to send these much earlier, but I've
been preoccupied.
- Add MAINTAINERS entry for diskonchip g3 driver
- Fix an overlooked conflict in bitfield value assignments
The latter update is a bit overdue, but there's no reason to wait any
longer"
* tag 'for-linus-20150724' of git://git.infradead.org/linux-mtd:
mtd: nand: Fix NAND_USE_BOUNCE_BUFFER flag conflict
MAINTAINERS: mtd: docg3: add docg3 maintainer
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata
Pull libata fixes from Tejun Heo:
"A couple important fixes.
- A block layer change which removed restriction on max transfer size
led to silent data corruption on some devices. A new quirk is
added to restore the old size limit for the reported device. If it
gets reported on more devices, we might have to consider restoring
the restriction for ATA devices by default.
- There finally is a SSD which is confirmed to cause data corruption
on TRIM regardless of which flavor is used. A new quirk is added
and the device is blacklisted
- Other device-specific workarounds"
* 'for-4.2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
libata: Do not blacklist M510DC
libata: increase the timeout when setting transfer mode
libata: add ATA_HORKAGE_MAX_SEC_1024 to revert back to previous max_sectors limit
libata: force disable trim for SuperSSpeed S238
libata: add ATA_HORKAGE_NOTRIM
libata: add ATA_HORKAGE_BROKEN_FPDMA_AA quirk for HP 250GB SATA disk VB0250EAVER
ata: pmp: add quirk for Marvell 4140 SATA PMP
|
|
Pull MMC fixes from Ulf Hansson:
"Here are some mmc fixes intended for v4.2 rc4.
Note, most of the changes are for the sdhci-esdhc-imx controller,
which also required us to modify some related DTS files. Those
changes have been acked by the SoC maintainer.
MMC core:
- Fix a reference inbalance issue for power_ro_lock_show() sysfs handler
MMC host:
- omap_hsmmc: Fix IRQ errorhandling for CD, DTO, and CRC
- sdhci: Prevent a kernel panic while using DMA
- mtk-sd: Let it depend on HAS_DMA to prevent build errors
- sdhci-esdhc: Make 8BIT bus work
- sdhci-esdhc-imx: Fix some regressions for DT based platforms
- sdhci-pxav3: Fix a regression for DT based platforms"
* tag 'mmc-4.2-rc3' of git://git.linaro.org/people/ulf.hansson/mmc:
mmc: sdhci-pxav3: fix platform_data is not initialized
dts: mmc: fsl-imx-esdhc: remove fsl,cd-controller support
mmc: sdhci-esdhc-imx: clear f_max in boarddata
mmc: sdhci-esdhc-imx: remove duplicated dts parsing
mmc: sdhci: make max-frequency property in device tree work
mmc: sdhci-esdhc-imx: move all non dt probe code into one function
mmc: sdhci-esdhc-imx: fix cd regression for dt platform
dts: imx7: fix sd card gpio polarity specified in device tree
dts: imx25: fix sd card gpio polarity specified in device tree
dts: imx6: fix sd card gpio polarity specified in device tree
dts: imx53: fix sd card gpio polarity specified in device tree
dts: imx51: fix sd card gpio polarity specified in device tree
mmc: sdhci-esdhc: Make 8BIT bus work
mmc: block: Add missing mmc_blk_put() in power_ro_lock_show()
mmc: MMC_MTK should depend on HAS_DMA
mmc: sdhci check parameters before call dma_free_coherent
mmc: omap_hsmmc: Handle BADA, DEB and CEB interrupts
mmc: omap_hsmmc: Fix DTO and DCRC handling
|
|
Commit 4104d326b670 ("ftrace: Remove global function list and call function
directly") simplified the ftrace code by removing the global_ops list with a
new design. But this cleanup also broke the filtering of PIDs that are added
to the set_ftrace_pid file.
Add back the proper hooks to have pid filtering working once again.
Cc: stable@vger.kernel.org # 3.16+
Reported-by: Matt Fleming <matt@console-pimps.org>
Reported-by: Richard Weinberger <richard.weinberger@gmail.com>
Tested-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
|
|
After commit 8d86e4fcccf6 ("mmc: sdhci-esdhc-imx: Call mmc_of_parse()"),
it's not used anymore.
Signed-off-by: Dong Aisheng <aisheng.dong@freescale.com>
Reviewed-by: Johan Derycke <johan.derycke@barco.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
|
|
git://anongit.freedesktop.org/drm-intel into drm-fixes
arb_timer kernel side fix from Chris.
* tag 'drm-intel-fixes-2015-07-23' of git://anongit.freedesktop.org/drm-intel:
drm/i915: Use two 32bit reads for select 64bit REG_READ ioctls
|
|
into drm-fixes
Some amdgpu fixes.
* 'drm-fixes-4.2' of git://people.freedesktop.org/~agd5f/linux:
drm/amdgpu/cz/dpm: properly report UVD and VCE clock levels
drm/amdgpu/cz: implement voltage validation properly
drm/amdgpu: add VCE harvesting instance query
drm/amdgpu: implement VCE 3.0 harvesting support (v4)
drm/amdgpu/dce10: Re-set VBLANK interrupt state when enabling a CRTC
drm/amdgpu/dce11: Re-set VBLANK interrupt state when enabling a CRTC
|
|
Pull virtio/vhost fixes from Michael Tsirkin:
"Bugfixes and documentation fixes.
Igor's patch that allows users to tweak memory table size is
borderline, but it does fix known crashes, so I merged it"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
vhost: add max_mem_regions module parameter
vhost: extend memory regions allocation to vmalloc
9p/trans_virtio: reset virtio device on remove
virtio/s390: rename drivers/s390/kvm -> drivers/s390/virtio
MAINTAINERS: separate section for s390 virtio drivers
virtio: define virtio_pci_cfg_cap in header.
virtio: Fix typecast of pointer in vring_init()
virtio scsi: fix unused variable warning
vhost: use binary search instead of linear in find_region()
virtio_net: document VIRTIO_NET_CTRL_GUEST_OFFLOADS
|
|
Signed-off-by: Leo Liu <leo.liu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
|
|
Pull networking fixes from David Miller:
1) Don't use shared bluetooth antenna in iwlwifi driver for management
frames, from Emmanuel Grumbach.
2) Fix device ID check in ath9k driver, from Felix Fietkau.
3) Off by one in xen-netback BUG checks, from Dan Carpenter.
4) Fix IFLA_VF_PORT netlink attribute validation, from Daniel Borkmann.
5) Fix races in setting peeked bit flag in SKBs during datagram
receive. If it's shared we have to clone it otherwise the value can
easily be corrupted. Fix from Herbert Xu.
6) Revert fec clock handling change, causes regressions. From Fabio
Estevam.
7) Fix use after free in fq_codel and sfq packet schedulers, from WANG
Cong.
8) ipvlan bug fixes (memory leaks, missing rcu_dereference_bh, etc.)
from WANG Cong and Konstantin Khlebnikov.
9) Memory leak in act_bpf packet action, from Alexei Starovoitov.
10) ARM bpf JIT bug fixes from Nicolas Schichan.
11) Fix backwards compat of ANY_LAYOUT in virtio_net driver, from
Michael S Tsirkin.
12) Destruction of bond with different ARP header types not handled
correctly, fix from Nikolay Aleksandrov.
13) Revert GRO receive support in ipv6 SIT tunnel driver, causes
regressions because the GRO packets created cannot be processed
properly on the GSO side if we forward the frame. From Herbert Xu.
14) TCCR update race and other fixes to ravb driver from Sergei
Shtylyov.
15) Fix SKB leaks in caif_queue_rcv_skb(), from Eric Dumazet.
16) Fix panics on packet scheduler filter replace, from Daniel Borkmann.
17) Make sure AF_PACKET sees properly IP headers in defragmented frames
(via PACKET_FANOUT_FLAG_DEFRAG option), from Edward Hyunkoo Jee.
18) AF_NETLINK cannot hold mutex in RCU callback, fix from Florian
Westphal.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (84 commits)
ravb: fix ring memory allocation
net: phy: dp83867: Fix warning check for setting the internal delay
openvswitch: allocate nr_node_ids flow_stats instead of num_possible_nodes
netlink: don't hold mutex in rcu callback when releasing mmapd ring
ARM: net: fix vlan access instructions in ARM JIT.
ARM: net: handle negative offsets in BPF JIT.
ARM: net: fix condition for load_order > 0 when translating load instructions.
tcp: suppress a division by zero warning
drivers: net: cpsw: remove tx event processing in rx napi poll
inet: frags: fix defragmented packet's IP header for af_packet
net: mvneta: fix refilling for Rx DMA buffers
stmmac: fix setting of driver data in stmmac_dvr_probe
sched: cls_flow: fix panic on filter replace
sched: cls_flower: fix panic on filter replace
sched: cls_bpf: fix panic on filter replace
net/mdio: fix mdio_bus_match for c45 PHY
net: ratelimit warnings about dst entry refcount underflow or overflow
caif: fix leaks and race in caif_queue_rcv_skb()
qmi_wwan: add the second QMI/network interface for Sierra Wireless MC7305/MC7355
ravb: fix race updating TCCR
...
|
|
Since the hardware sometimes mysteriously totally flummoxes the 64bit
read of a 64bit register when read using a single instruction, split the
read into two instructions. Since the read here is of automatically
incrementing timestamp counters, we also have to be very careful in
order to make sure that it does not increment between the two
instructions.
However, since userspace tried to workaround this issue and so enshrined
this ABI for a broken hardware read and in the process neglected that
the read only fails in some environments, we have to introduce a new
uABI flag for userspace to request the 2x32 bit accurate read of the
timestamp.
v2: Fix alignment check and include details of the workaround for
userspace.
Reported-by: Karol Herbst <freedesktop@karolherbst.de>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=91317
Testcase: igt/gem_reg_read
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Michał Winiarski <michal.winiarski@intel.com>
Cc: stable@vger.kernel.org
Tested-by: Michał Winiarski <michal.winiarski@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi into x86/urgent
Pull an EFI fix from Matt Fleming:
- Fix a bug in the Common Platform Error Record (CPER) driver that
caused old UEFI spec (< 2.3) versions of the memory error record
structure to be declared invalid. (Tony Luck)
Signed-off-by: Ingo Molnar <mingo@kernel.org>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211
Johannes Berg says:
====================
Some fixes for the current cycle:
1. Arik introduced an rtnl-locked regulatory API to be able
to differentiate between place do/don't have the RTNL;
this fixes missing locking in some of the code paths
2. Two small mesh bugfixes from Bob, one to avoid treating
a certain malformed over-the-air frame and one to avoid
sending a garbage field over the air.
3. A fix for powersave during WoWLAN suspend from Krishna Chaitanya.
4. A fix for a powersave vs. aggregation teardown race, from Michal.
5. Thomas reduced the loglevel of CRDA messages to avoid spamming
the kernel log with mostly irrelevant information.
6. Tom fixed a dangling debugfs directory pointer that could cause
crashes if subsequent addition of the same interface to debugfs
failed for some reason.
7. A fix from myself for a list corruption issue in mac80211 during
combined interface shutdown/removal - shut down interfaces first
and only then remove them to avoid that.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
"Two families of fixes:
- Fix an FPU context related boot crash on newer x86 hardware with
larger context sizes than what most people test. To fix this
without ugly kludges or extensive reverts we had to touch core task
allocator, to allow x86 to determine the task size dynamically, at
boot time.
I've tested it on a number of x86 platforms, and I cross-built it
to a handful of architectures:
(warns) (warns)
testing x86-64: -git: pass ( 0), -tip: pass ( 0)
testing x86-32: -git: pass ( 0), -tip: pass ( 0)
testing arm: -git: pass ( 1359), -tip: pass ( 1359)
testing cris: -git: pass ( 1031), -tip: pass ( 1031)
testing m32r: -git: pass ( 1135), -tip: pass ( 1135)
testing m68k: -git: pass ( 1471), -tip: pass ( 1471)
testing mips: -git: pass ( 1162), -tip: pass ( 1162)
testing mn10300: -git: pass ( 1058), -tip: pass ( 1058)
testing parisc: -git: pass ( 1846), -tip: pass ( 1846)
testing sparc: -git: pass ( 1185), -tip: pass ( 1185)
... so I hope the cross-arch impact 'none', as intended.
(by Dave Hansen)
- Fix various NMI handling related bugs unearthed by the big asm code
rewrite and generally make the NMI code more robust and more
maintainable while at it. These changes are a bit late in the
cycle, I hope they are still acceptable.
(by Andy Lutomirski)"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/fpu, sched: Introduce CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT and use it on x86
x86/fpu, sched: Dynamically allocate 'struct fpu'
x86/entry/64, x86/nmi/64: Add CONFIG_DEBUG_ENTRY NMI testing code
x86/nmi/64: Make the "NMI executing" variable more consistent
x86/nmi/64: Minor asm simplification
x86/nmi/64: Use DF to avoid userspace RSP confusing nested NMI detection
x86/nmi/64: Reorder nested NMI checks
x86/nmi/64: Improve nested NMI comments
x86/nmi/64: Switch stacks on userspace NMI entry
x86/nmi/64: Remove asm code that saves CR2
x86/nmi: Enable nested do_nmi() handling for 64-bit kernels
|
|
on x86
Don't burden architectures without dynamic task_struct sizing
with the overhead of dynamic sizing.
Also optimize the x86 code a bit by caching task_struct_size.
Acked-and-Tested-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave@sr71.net>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1437128892-9831-3-git-send-email-mingo@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
|
|
The FPU rewrite removed the dynamic allocations of 'struct fpu'.
But, this potentially wastes massive amounts of memory (2k per
task on systems that do not have AVX-512 for instance).
Instead of having a separate slab, this patch just appends the
space that we need to the 'task_struct' which we dynamically
allocate already. This saves from doing an extra slab
allocation at fork().
The only real downside here is that we have to stick everything
and the end of the task_struct. But, I think the
BUILD_BUG_ON()s I stuck in there should keep that from being too
fragile.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave@sr71.net>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1437128892-9831-2-git-send-email-mingo@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
|
|
Currently, we set wrong gfp_mask to page_owner info in case of isolated
freepage by compaction and split page. It causes incorrect mixed
pageblock report that we can get from '/proc/pagetypeinfo'. This metric
is really useful to measure fragmentation effect so should be accurate.
This patch fixes it by setting correct information.
Without this patch, after kernel build workload is finished, number of
mixed pageblock is 112 among roughly 210 movable pageblocks.
But, with this fix, output shows that mixed pageblock is just 57.
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Commit 2ae416b142b6 ("mm: new mm hook framework") introduced an empty
header file (mm-arch-hooks.h) for every architecture, even those which
doesn't need to define mm hooks.
As suggested by Geert Uytterhoeven, this could be cleaned through the use
of a generic header file included via each per architecture
asm/include/Kbuild file.
The PowerPC architecture is not impacted here since this architecture has
to defined the arch_remap MM hook.
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Switch to my kernel.org alias instead of a badly named gmail address,
which I rarely use.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Using __printf attributes helps to detect several format string issues
at compile time (even though -Wformat-security is currently disabled in
Makefile). For example it can detect when formatting a pointer as a
number, like the issue fixed in commit a3fa71c40f18 ("wl18xx: show
rx_frames_per_rates as an array as it really is"), or when the arguments
do not match the format string, c.f. for example commit 5ce1aca81435
("reiserfs: fix __RASSERT format string").
To prevent similar bugs in the future, add a __printf attribute to every
function prototype which needs one in include/linux/ and lib/. These
functions were mostly found by using gcc's -Wsuggest-attribute=format
flag.
Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
s390 has a constant hugepage size, by setting HPAGE_SHIFT we also change
e.g. the pageblock_order, which should be independent in respect to
hugepage support.
With this patch every architecture is free to define how to check
for hugepage support.
Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging and IIO driver fixes from Greg KH:
"Here's some staging and IIO driver fixes for 4.2-rc3.
Nothing major, the majority are IIO issues that were reported, with a
few other minor staging driver fixes. All have been in linux-next for
a while with no reported issues"
* tag 'staging-4.2-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (25 commits)
staging: vt6656: check ieee80211_bss_conf bssid not NULL
staging: vt6655: check ieee80211_bss_conf bssid not NULL
staging:lustre: remove irq.h from socklnd.h
staging: make board support depend on OF_IRQ and CLKDEV_LOOKUP
iio: tmp006: Check channel info on write
iio: sx9500: Add missing init in sx9500_buffer_pre{en,dis}able()
iio:light:ltr501: fix regmap dependency
iio:light:ltr501: fix variable in ltr501_init
iio: sx9500: fix bug in compensation code
iio: sx9500: rework error handling of raw readings
iio: magnetometer: mmc35240: fix available sampling frequencies
iio:light:stk3310: Fix REGMAP_I2C dependency
iio: light: STK3310: un-invert proximity values
iio:adc:cc10001_adc: fix Kconfig dependency
iio: light: tcs3414: Fix bug preventing to set integration time
iio:accel:bmc150-accel: fix counting direction
iio:light:cm3323: clear bitmask before set
iio: adc: at91_adc: allow to use full range of startup time
iio: DAC: ad5624r_spi: fix bit shift of output data value
iio: proximity: sx9500: Fix proximity value
...
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO fixes from Linus Walleij:
"This is a first set of GPIO fixes for the v4.2 series, all hitting
individual drivers and nothing else (except for a documentation
oneliner. I intended to send a request earlier but life intervened)"
* tag 'gpio-v4.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
gpio: pca953x: fix nested irqs rescheduling
gpio: omap: prevent module from being unloaded while in use
gpio: max732x: Add missing dev reference to gpiochip
gpio/xilinx: Use correct address when setting initial values.
gpio: zynq: Fix problem with unbalanced pm_runtime_enable
gpio: omap: add missed spin_unlock_irqrestore in omap_gpio_irq_type
gpio: brcmstb: fix null ptr dereference in driver remove
gpio: Remove double "base" in comment
|
|
The RTNL is required to check for IR-relaxation conditions that allow
more channels to beacon. Export an RTNL locked version of reg_can_beacon
and use it where possible in AP/STA interface type flows, where
IR-relaxation may be applicable.
Fixes: 06f207fc5418 ("cfg80211: change GO_CONCURRENT to IR_CONCURRENT for STA")
Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
|
|
Pull block fixes from Jens Axboe:
"A collection of fixes from the last few weeks that should go into the
current series. This contains:
- Various fixes for the per-blkcg policy data, fixing regressions
since 4.1. From Arianna and Tejun
- Code cleanup for bcache closure macros from me. Really just
flushing this out, it's been sitting in another branch for months
- FIELD_SIZEOF cleanup from Maninder Singh
- bio integrity oops fix from Mike
- Timeout regression fix for blk-mq from Ming Lei"
* 'for-linus' of git://git.kernel.dk/linux-block:
blk-mq: set default timeout as 30 seconds
NVMe: Reread partitions on metadata formats
bcache: don't embed 'return' statements in closure macros
blkcg: fix blkcg_policy_data allocation bug
blkcg: implement all_blkcgs list
blkcg: blkcg_css_alloc() should grab blkcg_pol_mutex while iterating blkcg_policy[]
blkcg: allow blkcg_pol_mutex to be grabbed from cgroup [file] methods
block/blk-cgroup.c: free per-blkcg data when freeing the blkcg
block: use FIELD_SIZEOF to calculate size of a field
bio integrity: do not assume bio_integrity_pool exists if bioset exists
|
|
ip6_datagram_connect() is doing a lot of socket changes without
socket being locked.
This looks wrong, at least for udp_lib_rehash() which could corrupt
lists because of concurrent udp_sk(sk)->udp_portaddr_hash accesses.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma
Pull rdma fixes from Doug Ledford:
"Mainly fix-ups for the various 4.2 items"
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (24 commits)
IB/core: Destroy ocrdma_dev_id IDR on module exit
IB/core: Destroy multcast_idr on module exit
IB/mlx4: Optimize do_slave_init
IB/mlx4: Fix memory leak in do_slave_init
IB/mlx4: Optimize freeing of items on error unwind
IB/mlx4: Fix use of flow-counters for process_mad
IB/ipath: Convert use of __constant_<foo> to <foo>
IB/ipoib: Set MTU to max allowed by mode when mode changes
IB/ipoib: Scatter-Gather support in connected mode
IB/ucm: Fix bitmap wrap when devnum > IB_UCM_MAX_DEVICES
IB/ipoib: Prevent lockdep warning in __ipoib_ib_dev_flush
IB/ucma: Fix lockdep warning in ucma_lock_files
rds: rds_ib_device.refcount overflow
RDMA/nes: Fix for incorrect recording of the MAC address
RDMA/nes: Fix for resolving the neigh
RDMA/core: Fixes for port mapper client registration
IB/IPoIB: Fix bad error flow in ipoib_add_port()
IB/mlx4: Do not attemp to report HCA clock offset on VFs
IB/cm: Do not queue work to a device that's going away
IB/srp: Avoid using uninitialized variable
...
|
|
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
|
|
Pull file locking updates from Jeff Layton:
"I had thought that I was going to get away without a pull request this
cycle. There was a NFSv4 file locking problem that cropped up that I
tried to fix in the NFSv4 code alone, but that fix has turned out to
be problematic. These patches fix this in the correct way.
Note that this touches some NFSv4 code as well. Ordinarily I'd wait
for Trond to ACK this, but he's on holiday right now and the bug is
rather nasty. So I suggest we merge this and if he raises issues with
it we can sort it out when he gets back"
Acked-by: Bruce Fields <bfields@fieldses.org>
Acked-by: Dan Williams <dan.j.williams@intel.com>
[ +1 to this series fixing a 100% reproducible slab corruption +
general protection fault in my nfs-root test environment. - Dan ]
Acked-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
* tag 'locks-v4.2-1' of git://git.samba.org/jlayton/linux:
locks: inline posix_lock_file_wait and flock_lock_file_wait
nfs4: have do_vfs_lock take an inode pointer
locks: new helpers - flock_lock_inode_wait and posix_lock_inode_wait
locks: have flock_lock_file take an inode pointer instead of a filp
Revert "nfs: take extra reference to fl->fl_file when running a LOCKU operation"
|
|
Pull KVM fixes from Paolo Bonzini:
- Fix FPU refactoring ("kvm: x86: fix load xsave feature warning")
- Fix eager FPU mode (Cc stable)
- AMD bits of MTRR virtualization
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
kvm: x86: fix load xsave feature warning
KVM: x86: apply guest MTRR virtualization on host reserved pages
KVM: SVM: Sync g_pat with guest-written PAT value
KVM: SVM: use NPT page attributes
KVM: count number of assigned devices
KVM: VMX: fix vmwrite to invalid VMCS
KVM: x86: reintroduce kvm_is_mmio_pfn
x86: hyperv: add CPUID bit for crash handlers
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
Pull final init.h/module.h code relocation from Paul Gortmaker:
"With the release of 4.2-rc2 done, we should not be seeing any new code
added that gets upset by this small code move, and we've banked yet
another complete week of testing with this move in place on top of
4.2-rc1 via linux-next to ensure that remained true.
Given that, I'd like to put it in now so that people formulating new
work for 4.3-rc1 will be exposed to the ever so slightly stricter (but
sensible) requirements wrt. whether they are needing init.h vs.
module.h macros, even if they are not using linux-next.
The diffstat of the move is slightly asymmetrical due to needing to
leave behind a couple #ifdef in the old location and add the same ones
to the new location, but other than that, it is a 1:1 move, complete
with the module_init/exit trailing semicolon that we can't fix. That
is, until/unless someone does a tree-wide sed fix of all the
approximately 800 currently in tree users relying on it"
* tag 'module-final-v4.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux:
module: relocate module_init from init.h to module.h
|
|
limit
Since no longer limiting max_sectors to BLK_DEF_MAX_SECTORS (commit 34b48db66e08),
data corruption may occur on ST380013AS drive configured on 82801JI (ICH10 Family)
SATA controller. This patch will allow the driver to limit max_sectors as before
# cat /sys/block/sdb/queue/max_sectors_kb
512
I was able to double the max_sectors_kb value up to 16384 on linux-4.2.0-rc2
before seeing corruption, but seems safer to use previous limit. Without this
patch max_sectors_kb will be 32767.
tj: Minor comment update.
Reported-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: David Milburn <dmilburn@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org # v3.19 and later
Fixes: 34b48db66e08 ("block: remove artifical max_hw_sectors cap")
|
|
Some devices lose data on TRIM whether queued or not. This patch adds
a horkage to disable TRIM.
tj: Collapsed unnecessary if() nesting.
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
|
