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f2fs: add a way to turn off ipu bio cache

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Setting 0x40 in /sys/fs/f2fs/dev/ipu_policy gives a way to turn off
bio cache, which is useufl to check whether block layer using hardware
encryption engine merges IOs correctly.

Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2020-01-06 16:43:09 -08:00
parent bf2cbd3c57
commit 0e7f41974e
3 changed files with 6 additions and 3 deletions
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5
Documentation/filesystems/f2fs.txt
View file

@ -331,10 +331,11 @@ Files in /sys/fs/f2fs/<devname>
conducts. 32 sections is set by default.
ipu_policy This parameter controls the policy of in-place
updates in f2fs. There are five policies:
updates in f2fs. User can set:
0x01: F2FS_IPU_FORCE, 0x02: F2FS_IPU_SSR,
0x04: F2FS_IPU_UTIL, 0x08: F2FS_IPU_SSR_UTIL,
0x10: F2FS_IPU_FSYNC.
0x10: F2FS_IPU_FSYNC, 0x40: F2FS_IPU_NOCACHE.
Refer segment.h for details.
min_ipu_util This parameter controls the threshold to trigger
in-place-updates. The number indicates percentage

2
fs/f2fs/segment.c
View file

@ -3289,7 +3289,7 @@ int f2fs_inplace_write_data(struct f2fs_io_info *fio)
stat_inc_inplace_blocks(fio->sbi);
if (fio->bio)
if (fio->bio && !(SM_I(sbi)->ipu_policy & (1 << F2FS_IPU_NOCACHE)))
err = f2fs_merge_page_bio(fio);
else
err = f2fs_submit_page_bio(fio);

2
fs/f2fs/segment.h
View file

@ -608,6 +608,7 @@ static inline int utilization(struct f2fs_sb_info *sbi)
* F2FS_IPU_FSYNC - activated in fsync path only for high performance flash
* storages. IPU will be triggered only if the # of dirty
* pages over min_fsync_blocks.
* F2FS_IPU_NOCACHE - disable IPU bio cache.
* F2FS_IPUT_DISABLE - disable IPU. (=default option)
*/
#define DEF_MIN_IPU_UTIL 70
@ -623,6 +624,7 @@ enum {
F2FS_IPU_SSR_UTIL,
F2FS_IPU_FSYNC,
F2FS_IPU_ASYNC,
F2FS_IPU_NOCACHE,
};
static inline unsigned int curseg_segno(struct f2fs_sb_info *sbi,