unimore/kernel-hacking-2024-linux-steffo
unimore/kernel-hacking-2024-linux-steffo
1
Fork 0
Code Pull requests 5 Wiki Activity

md/raid5: Make logic blocking check consistent with logic that blocks

Browse source 
The check in raid5_make_request differs very slightly from the logic
that causes it to block lower down. This likely does not cause a bug
as the check is fuzzy anyway (as reshape may move on between the first
check and the subsequent check). However, make it consistent so it can
be cleaned up in a subsequent patch.

The condition which causes the schedule is:

 !(mddev->reshape_backwards ? logical_sector < conf->reshape_progress :
   logical_sector >= conf->reshape_progress) &&
  (mddev->reshape_backwards ? logical_sector < conf->reshape_safe :
   logical_sector >= conf->reshape_safe)

The condition that causes the early bailout is made to match this.

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Logan Gunthorpe 2022-06-16 13:19:31 -06:00 committed by Jens Axboe
parent 9dfbdafda3
commit 6e3f50d30a
1 changed files with 1 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/md/raid5.c
View file

@ -5842,7 +5842,7 @@ static bool raid5_make_request(struct mddev *mddev, struct bio * bi)
if ((bi->bi_opf & REQ_NOWAIT) &&
(conf->reshape_progress != MaxSector) &&
(mddev->reshape_backwards
? (logical_sector > conf->reshape_progress && logical_sector <= conf->reshape_safe)
? (logical_sector >= conf->reshape_progress && logical_sector < conf->reshape_safe)
: (logical_sector >= conf->reshape_safe && logical_sector < conf->reshape_progress))) {
bio_wouldblock_error(bi);
if (rw == WRITE)