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| author | Jack Qiu <jack.qiu@huawei.com> | 2021-04-09 13:27:35 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-04-09 14:54:23 -0700 |
| commit | df41872b68601059dd4a84858952dcae58acd331 (patch) | |
| tree | 3dcf37942a7c52b11f79e0bf7b81264bc9f367f6 /mm/page_poison.c | |
| parent | 7ad1e366167837daeb93d0bacb57dee820b0b898 (diff) | |
fs: direct-io: fix missing sdio->boundary
I encountered a hung task issue, but not a performance one. I run DIO
on a device (need lba continuous, for example open channel ssd), maybe
hungtask in below case:
DIO: Checkpoint:
get addr A(at boundary), merge into BIO,
no submit because boundary missing
flush dirty data(get addr A+1), wait IO(A+1)
writeback timeout, because DIO(A) didn't submit
get addr A+2 fail, because checkpoint is doing
dio_send_cur_page() may clear sdio->boundary, so prevent it from missing
a boundary.
Link: https://lkml.kernel.org/r/20210322042253.38312-1-jack.qiu@huawei.com
Fixes: b1058b981272 ("direct-io: submit bio after boundary buffer is added to it")
Signed-off-by: Jack Qiu <jack.qiu@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_poison.c')
0 files changed, 0 insertions, 0 deletions