On Thu, Nov 10, 2022 at 10:25 AM Zhang Tianci <zhangtianci.1997@xxxxxxxxxxxxx> wrote: > > > fio -filename=testfile -ioengine=libaio -bs=16M -size=10G -numjobs=100 > > -iodepth=1 -runtime=60 > > -rw=write -group_reporting -name="test" > > > > Then I found the first deadlock state, but it is not the real reason. > > > > I will do a test with the latest kernel. I will report to you the result later. > > > I can reproduce the first deadlock in linux-6.1-rc4. > There are 26 stripe_head and 26 fio threads blocked with same backtrace: > > #0 [ffffc9000cd0f8b0] __schedule at ffffffff818b3c3c > #1 [ffffc9000cd0f940] schedule at ffffffff818b4313 > #2 [ffffc9000cd0f950] md_bitmap_startwrite at ffffffffc063354a [md_mod] > #3 [ffffc9000cd0f9c0] __add_stripe_bio at ffffffffc064fbd6 [raid456] > #4 [ffffc9000cd0fa00] raid5_make_request at ffffffffc065a84c [raid456] > #5 [ffffc9000cd0fb30] md_handle_request at ffffffffc0628496 [md_mod] > #6 [ffffc9000cd0fb98] __submit_bio at ffffffff813f308f > #7 [ffffc9000cd0fbb8] submit_bio_noacct_nocheck at ffffffff813f3501 > #8 [ffffc9000cd0fc00] __block_write_full_page at ffffffff8134ca64 > #9 [ffffc9000cd0fc60] __writepage at ffffffff8123f4a3 > #10 [ffffc9000cd0fc78] write_cache_pages at ffffffff8123fb57 > #11 [ffffc9000cd0fd70] generic_writepages at ffffffff8123feef > #12 [ffffc9000cd0fdc0] do_writepages at ffffffff81241f12 > #13 [ffffc9000cd0fe28] filemap_fdatawrite_wbc at ffffffff8123306b > #14 [ffffc9000cd0fe48] __filemap_fdatawrite_range at ffffffff81239154 > #15 [ffffc9000cd0fec0] file_write_and_wait_range at ffffffff812393e1 > #16 [ffffc9000cd0fef0] blkdev_fsync at ffffffff813ec223 > #17 [ffffc9000cd0ff08] do_fsync at ffffffff81342798 > #18 [ffffc9000cd0ff30] __x64_sys_fsync at ffffffff813427e0 > #19 [ffffc9000cd0ff38] do_syscall_64 at ffffffff818a6114 > #20 [ffffc9000cd0ff50] entry_SYSCALL_64_after_hwframe at ffffffff81a0009b Thanks for this information. I guess this is with COUNTER_MAX of 4? And it is slightly different to the issue you found? I will try to look into this next week (taking some time off this week). Thanks, Song
