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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2020-12-03 09:52:45 -0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2020-12-07 08:41:25 -0800 |
| commit | 10208567f11bd572331cbbcb9a89c61a143811a1 (patch) | |
| tree | 5dcbe4ab3295300d06b1bae47b31ebb40e5d5c20 /fs/f2fs/data.c | |
| parent | ec2ddf499402a665d1f6f7f5ce1391100e54089e (diff) | |
| download | linux-10208567f11bd572331cbbcb9a89c61a143811a1.tar.gz linux-10208567f11bd572331cbbcb9a89c61a143811a1.tar.bz2 linux-10208567f11bd572331cbbcb9a89c61a143811a1.zip | |
f2fs: introduce max_io_bytes, a sysfs entry, to limit bio size
This patch adds max_io_bytes to limit bio size when f2fs tries to merge
consecutive IOs. This can give a testing point to split out bios and check
end_io handles those bios correctly. This is used to capture a recent bug
on the decompression and fsverity flow.
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/data.c')
| -rw-r--r-- | fs/f2fs/data.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index e85fd8f77f3f..cb28089e1eff 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -736,6 +736,9 @@ int f2fs_submit_page_bio(struct f2fs_io_info *fio) static bool page_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio, block_t last_blkaddr, block_t cur_blkaddr) { + if (unlikely(sbi->max_io_bytes && + bio->bi_iter.bi_size >= sbi->max_io_bytes)) + return false; if (last_blkaddr + 1 != cur_blkaddr) return false; return __same_bdev(sbi, cur_blkaddr, bio); |