On Thu, 3 Nov 2022, Guoqing Jiang wrote: > Hi, > > On 11/3/22 12:27 AM, Mikulas Patocka wrote: > > Hi > > > > There's a crash in the test shell/lvchange-rebuild-raid.sh when running > > the lvm testsuite. It can be reproduced by running "make check_local > > T=shell/lvchange-rebuild-raid.sh" in a loop. > > I have problem to run the cmd (not sure what I missed), it would be better if > the relevant cmds are extracted from the script then I can reproduce it with > those cmds directly. Ask Zdenek Kabelac to help you with running the testsuite. He has better understanding of the testsuite than me. > BTW, is the mempool_free from endio -> dec_count -> complete_io? > And io which caused the crash is from dm_io -> async_io / sync_io > -> dispatch_io, seems dm-raid1 can call it instead of dm-raid, so I > suppose the io is for mirror image. > > Thanks, > Guoqing I presume that the bug is caused by destruction of a bio set while bio from that set was in progress. When the bio finishes and an attempt is made to free the bio, a crash happens when the code tries to free the bio into a destroyed mempool. I can do more testing to validate this theory. Mikulas
