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Diffstat (limited to 'drivers/misc/vmw_balloon.c')
-rw-r--r--drivers/misc/vmw_balloon.c68
1 files changed, 16 insertions, 52 deletions
diff --git a/drivers/misc/vmw_balloon.c b/drivers/misc/vmw_balloon.c
index f0beb65cbeeb..aed95251072b 100644
--- a/drivers/misc/vmw_balloon.c
+++ b/drivers/misc/vmw_balloon.c
@@ -47,7 +47,7 @@
MODULE_AUTHOR("VMware, Inc.");
MODULE_DESCRIPTION("VMware Memory Control (Balloon) Driver");
-MODULE_VERSION("1.3.3.0-k");
+MODULE_VERSION("1.3.4.0-k");
MODULE_ALIAS("dmi:*:svnVMware*:*");
MODULE_ALIAS("vmware_vmmemctl");
MODULE_LICENSE("GPL");
@@ -58,12 +58,6 @@ MODULE_LICENSE("GPL");
*/
/*
- * Rate of allocating memory when there is no memory pressure
- * (driver performs non-sleeping allocations).
- */
-#define VMW_BALLOON_NOSLEEP_ALLOC_MAX 16384U
-
-/*
* Rates of memory allocaton when guest experiences memory pressure
* (driver performs sleeping allocations).
*/
@@ -72,13 +66,6 @@ MODULE_LICENSE("GPL");
#define VMW_BALLOON_RATE_ALLOC_INC 16U
/*
- * Rates for releasing pages while deflating balloon.
- */
-#define VMW_BALLOON_RATE_FREE_MIN 512U
-#define VMW_BALLOON_RATE_FREE_MAX 16384U
-#define VMW_BALLOON_RATE_FREE_INC 16U
-
-/*
* When guest is under memory pressure, use a reduced page allocation
* rate for next several cycles.
*/
@@ -100,9 +87,6 @@ MODULE_LICENSE("GPL");
*/
#define VMW_PAGE_ALLOC_CANSLEEP (GFP_HIGHUSER)
-/* Maximum number of page allocations without yielding processor */
-#define VMW_BALLOON_YIELD_THRESHOLD 1024
-
/* Maximum number of refused pages we accumulate during inflation cycle */
#define VMW_BALLOON_MAX_REFUSED 16
@@ -279,7 +263,6 @@ struct vmballoon {
/* adjustment rates (pages per second) */
unsigned int rate_alloc;
- unsigned int rate_free;
/* slowdown page allocations for next few cycles */
unsigned int slow_allocation_cycles;
@@ -503,18 +486,13 @@ static bool vmballoon_send_batched_unlock(struct vmballoon *b,
static void vmballoon_pop(struct vmballoon *b)
{
struct page *page, *next;
- unsigned int count = 0;
list_for_each_entry_safe(page, next, &b->pages, lru) {
list_del(&page->lru);
__free_page(page);
STATS_INC(b->stats.free);
b->size--;
-
- if (++count >= b->rate_free) {
- count = 0;
- cond_resched();
- }
+ cond_resched();
}
if ((b->capabilities & VMW_BALLOON_BATCHED_CMDS) != 0) {
@@ -716,7 +694,7 @@ static void vmballoon_add_batched_page(struct vmballoon *b, int idx,
*/
static void vmballoon_inflate(struct vmballoon *b)
{
- unsigned int rate;
+ unsigned rate;
unsigned int allocations = 0;
unsigned int num_pages = 0;
int error = 0;
@@ -743,13 +721,13 @@ static void vmballoon_inflate(struct vmballoon *b)
* Start with no sleep allocation rate which may be higher
* than sleeping allocation rate.
*/
- rate = b->slow_allocation_cycles ?
- b->rate_alloc : VMW_BALLOON_NOSLEEP_ALLOC_MAX;
+ rate = b->slow_allocation_cycles ? b->rate_alloc : UINT_MAX;
- pr_debug("%s - goal: %d, no-sleep rate: %d, sleep rate: %d\n",
+ pr_debug("%s - goal: %d, no-sleep rate: %u, sleep rate: %d\n",
__func__, b->target - b->size, rate, b->rate_alloc);
- while (b->size < b->target && num_pages < b->target - b->size) {
+ while (!b->reset_required &&
+ b->size < b->target && num_pages < b->target - b->size) {
struct page *page;
if (flags == VMW_PAGE_ALLOC_NOSLEEP)
@@ -799,10 +777,7 @@ static void vmballoon_inflate(struct vmballoon *b)
break;
}
- if (++allocations > VMW_BALLOON_YIELD_THRESHOLD) {
- cond_resched();
- allocations = 0;
- }
+ cond_resched();
if (allocations >= rate) {
/* We allocated enough pages, let's take a break. */
@@ -838,36 +813,29 @@ static void vmballoon_deflate(struct vmballoon *b)
unsigned int num_pages = 0;
int error;
- pr_debug("%s - size: %d, target %d, rate: %d\n", __func__, b->size,
- b->target, b->rate_free);
+ pr_debug("%s - size: %d, target %d\n", __func__, b->size, b->target);
/* free pages to reach target */
list_for_each_entry_safe(page, next, &b->pages, lru) {
list_del(&page->lru);
b->ops->add_page(b, num_pages++, page);
+
if (num_pages == b->batch_max_pages) {
error = b->ops->unlock(b, num_pages, &b->target);
num_pages = 0;
- if (error) {
- /* quickly decrease rate in case of error */
- b->rate_free = max(b->rate_free / 2,
- VMW_BALLOON_RATE_FREE_MIN);
+ if (error)
return;
- }
}
- if (++i >= b->size - b->target)
+ if (b->reset_required || ++i >= b->size - b->target)
break;
+
+ cond_resched();
}
if (num_pages > 0)
b->ops->unlock(b, num_pages, &b->target);
-
- /* slowly increase rate if there were no errors */
- if (error == 0)
- b->rate_free = min(b->rate_free + VMW_BALLOON_RATE_FREE_INC,
- VMW_BALLOON_RATE_FREE_MAX);
}
static const struct vmballoon_ops vmballoon_basic_ops = {
@@ -993,11 +961,8 @@ static int vmballoon_debug_show(struct seq_file *f, void *offset)
/* format rate info */
seq_printf(f,
- "rateNoSleepAlloc: %8d pages/sec\n"
- "rateSleepAlloc: %8d pages/sec\n"
- "rateFree: %8d pages/sec\n",
- VMW_BALLOON_NOSLEEP_ALLOC_MAX,
- b->rate_alloc, b->rate_free);
+ "rateSleepAlloc: %8d pages/sec\n",
+ b->rate_alloc);
seq_printf(f,
"\n"
@@ -1088,7 +1053,6 @@ static int __init vmballoon_init(void)
/* initialize rates */
balloon.rate_alloc = VMW_BALLOON_RATE_ALLOC_MAX;
- balloon.rate_free = VMW_BALLOON_RATE_FREE_MAX;
INIT_DELAYED_WORK(&balloon.dwork, vmballoon_work);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-18 19:56:19 +0000