On Mon, 19 May 2025, Yu Kuai wrote: > Hi, > > 在 2025/05/17 0:00, Mikulas Patocka 写道: > > Hi > > > > The commit e879a0d9cb086c8e52ce6c04e5bfa63825a6213c breaks the test > > shell/lvcreate-large-raid.sh in the lvm2 testsuite. > > > > The breakage is caused by removing the line "read_bio->bi_opf = op | > > do_sync;" > > > > Sorry that I don't undertand here, before the patch: > > op = bio_op(bio); > do_sync = bio->bi_opf & REQ_SYNC; > read_bio->bi_opf = op | do_sync > > after the patch: > > read_bio = bio_alloc_clone(, bio, ...) > read_bio->bi_opf = bio->bi_opf > > So, after the patch, other than bio_op() and REQ_SYNC, other bio flags > are keeped, I don't see problem for now, I'll run the test later. > > Thanks, > Kuai The problem is caused by the REQ_RAHEAD flag - bios with this flag may fail anytime. I presume that the bug is caused by raid1 mishandling this failure. Mikulas
