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
