On 6/28/23 11:56?AM, Kent Overstreet wrote: > On Wed, Jun 28, 2023 at 09:22:15AM -0600, Jens Axboe wrote: >> On 6/28/23 8:58?AM, Jens Axboe wrote: >>> I should have something later today, don't feel like I fully understand >>> all of it just yet. >> >> Might indeed be delayed_fput, just the flush is a bit broken in that it >> races with the worker doing the flush. In any case, with testing that, I >> hit this before I got an umount failure on loop 6 of generic/388: >> >> fsck from util-linux 2.38.1 >> recovering from clean shutdown, journal seq 14642 >> journal read done, replaying entries 14642-14642 >> checking allocations >> starting journal replay, 0 keys >> checking need_discard and freespace btrees >> checking lrus >> checking backpointers to alloc keys >> checking backpointers to extents >> backpointer for missing extent >> u64s 9 type backpointer 0:7950303232:0 len 0 ver 0: bucket=0:15164:0 btree=extents l=0 offset=0:0 len=88 pos=1342182431:5745:U32_MAX, not fixing > > Known bug, but it's gotten difficult to reproduce - if generic/388 ends > up being a better reproducer for this that'll be nice Seems to reproduce in anywhere from 1..4 iterations for me. -- Jens Axboe
