diff options
| author | Chao Yu | 2021-05-26 14:29:27 +0800 |
|---|---|---|
| committer | Jaegeuk Kim | 2021-06-23 01:09:35 -0700 |
| commit | 859fca6b706e005f7cf19aa2ce7bb4005bcef427 (patch) | |
| tree | cf00ed68ef6b42d39c6a601988403b95b981f5d6 /fs/f2fs/f2fs.h | |
| parent | 0b8fc00601c0d8bea19667bbc66f00e13d954e4a (diff) | |
f2fs: swap: support migrating swapfile in aligned write mode
This patch supports to migrate swapfile in aligned write mode during
swapon in order to keep swapfile being aligned to section as much as
possible, then pinned swapfile will locates fully filled section which
may not affected by GC.
However, for the case that swapfile's size is not aligned to section
size, it will still leave last extent in file's tail as unaligned due
to its size is smaller than section size, like case #2.
case #1
xfs_io -f /mnt/f2fs/file -c "pwrite 0 4M" -c "fsync"
Before swapon:
EXT: FILE-OFFSET BLOCK-RANGE TOTAL FLAGS
0: [0..3047]: 1123352..1126399 3048 0x1000
1: [3048..7143]: 237568..241663 4096 0x1000
2: [7144..8191]: 245760..246807 1048 0x1001
After swapon:
EXT: FILE-OFFSET BLOCK-RANGE TOTAL FLAGS
0: [0..8191]: 249856..258047 8192 0x1001
Kmsg:
F2FS-fs (zram0): Swapfile (2) is not align to section:
1) creat(), 2) ioctl(F2FS_IOC_SET_PIN_FILE), 3) fallocate(2097152 * n)
case #2
xfs_io -f /mnt/f2fs/file -c "pwrite 0 3M" -c "fsync"
Before swapon:
EXT: FILE-OFFSET BLOCK-RANGE TOTAL FLAGS
0: [0..3047]: 246808..249855 3048 0x1000
1: [3048..6143]: 237568..240663 3096 0x1001
After swapon:
EXT: FILE-OFFSET BLOCK-RANGE TOTAL FLAGS
0: [0..4095]: 258048..262143 4096 0x1000
1: [4096..6143]: 238616..240663 2048 0x1001
Kmsg:
F2FS-fs (zram0): Swapfile: last extent is not aligned to section
F2FS-fs (zram0): Swapfile (2) is not align to section:
1) creat(), 2) ioctl(F2FS_IOC_SET_PIN_FILE), 3) fallocate(2097152 * n)
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/f2fs.h')
| -rw-r--r-- | fs/f2fs/f2fs.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 561e52a07391..d84e78dabdbe 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -709,6 +709,7 @@ enum { FI_MMAP_FILE, /* indicate file was mmapped */ FI_ENABLE_COMPRESS, /* enable compression in "user" compression mode */ FI_COMPRESS_RELEASED, /* compressed blocks were released */ + FI_ALIGNED_WRITE, /* enable aligned write */ FI_MAX, /* max flag, never be used */ }; |