On Wed, 26 Jul 2023 23:29:51 +0800 Ming Lei <tom.leiming@xxxxxxxxx> wrote: > On Wed, Jul 26, 2023 at 6:02 PM David Howells <dhowells@xxxxxxxxxx> wrote: > > > > Hi, > > > > With 6.5-rc2 (6.5.0-0.rc2.20230721gitf7e3a1bafdea.20.fc39.x86_64), I'm seeing > > a bunch of processes getting stuck in the D state on my desktop after a few > > hours of reading email and compiling stuff. It's happened every day this week > > so far and I managed to grab stack traces of the stuck processes this morning > > (see attached). > > > > There are two blockdevs involved below, /dev/md2 and /dev/md3. md3 is a raid1 > > array with two partitions with an ext4 partition on it. md2 is similar but > > it's dm-crypted and ext4 is on top of that. > > > ... > > > ===117547=== > > PID TTY STAT TIME COMMAND > > 117547 ? D 5:12 [kworker/u16:8+flush-9:3] > > [<0>] blk_mq_get_tag+0x11e/0x2b0 > > [<0>] __blk_mq_alloc_requests+0x1bc/0x350 > > [<0>] blk_mq_submit_bio+0x2c7/0x680 > > [<0>] __submit_bio+0x8b/0x170 > > [<0>] submit_bio_noacct_nocheck+0x159/0x370 > > [<0>] __block_write_full_folio+0x1e1/0x400 > > [<0>] writepage_cb+0x1a/0x70 > > [<0>] write_cache_pages+0x144/0x3b0 > > [<0>] do_writepages+0x164/0x1e0 > > [<0>] __writeback_single_inode+0x3d/0x360 > > [<0>] writeback_sb_inodes+0x1ed/0x4b0 > > [<0>] __writeback_inodes_wb+0x4c/0xf0 > > [<0>] wb_writeback+0x298/0x310 > > [<0>] wb_workfn+0x35b/0x510 > > [<0>] process_one_work+0x1de/0x3f0 > > [<0>] worker_thread+0x51/0x390 > > [<0>] kthread+0xe5/0x120 > > [<0>] ret_from_fork+0x31/0x50 > > [<0>] ret_from_fork_asm+0x1b/0x30 > > BTW, -rc3 fixes one similar issue on the above code path, so please try -rc3. > > 106397376c03 sbitmap: fix batching wakeup That patch really needs a Fixes:, please. And consideration for a -stable backport. Looking at what has changed recently in sbitmap, it seems unlikely that 106397376c03 fixes an issue that just appeared in 6.5-rcX. But maybe the issue you have identified has recently become easier to hit; we'll see.
