Messages in this thread Patch in this message | | | From | Jaegeuk Kim <> | Subject | [PATCH] f2fs: add a way to turn off ipu bio cache | Date | Mon, 6 Jan 2020 18:07:09 -0800 |
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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.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> --- Documentation/filesystems/f2fs.txt | 1 + fs/f2fs/segment.c | 2 +- fs/f2fs/segment.h | 1 + 3 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/Documentation/filesystems/f2fs.txt b/Documentation/filesystems/f2fs.txt index 41b5aa94b30f..cd93bcc34726 100644 --- a/Documentation/filesystems/f2fs.txt +++ b/Documentation/filesystems/f2fs.txt @@ -335,6 +335,7 @@ Files in /sys/fs/f2fs/<devname> 0x01: F2FS_IPU_FORCE, 0x02: F2FS_IPU_SSR, 0x04: F2FS_IPU_UTIL, 0x08: F2FS_IPU_SSR_UTIL, 0x10: F2FS_IPU_FSYNC. + 0x40: F2FS_IPU_NOCACHE disables bio caches. min_ipu_util This parameter controls the threshold to trigger in-place-updates. The number indicates percentage diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index a9519532c029..311fe4937f6a 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -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); diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h index a1b3951367cd..02e620470eef 100644 --- a/fs/f2fs/segment.h +++ b/fs/f2fs/segment.h @@ -623,6 +623,7 @@ 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, -- 2.24.0.525.g8f36a354ae-goog
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