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List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: similar deadlock of xfstests generic/475 and generic/648 on 6.12.41 To: Wang Yugui , linux-btrfs@vger.kernel.org References: <20250804075756.608E.409509F4@e16-tech.com> Content-Language: en-US From: Qu Wenruo Autocrypt: addr=quwenruo.btrfs@gmx.com; keydata= xsBNBFnVga8BCACyhFP3ExcTIuB73jDIBA/vSoYcTyysFQzPvez64TUSCv1SgXEByR7fju3o 8RfaWuHCnkkea5luuTZMqfgTXrun2dqNVYDNOV6RIVrc4YuG20yhC1epnV55fJCThqij0MRL 1NxPKXIlEdHvN0Kov3CtWA+R1iNN0RCeVun7rmOrrjBK573aWC5sgP7YsBOLK79H3tmUtz6b 9Imuj0ZyEsa76Xg9PX9Hn2myKj1hfWGS+5og9Va4hrwQC8ipjXik6NKR5GDV+hOZkktU81G5 gkQtGB9jOAYRs86QG/b7PtIlbd3+pppT0gaS+wvwMs8cuNG+Pu6KO1oC4jgdseFLu7NpABEB AAHNIlF1IFdlbnJ1byA8cXV3ZW5ydW8uYnRyZnNAZ214LmNvbT7CwJQEEwEIAD4CGwMFCwkI BwIGFQgJCgsCBBYCAwECHgECF4AWIQQt33LlpaVbqJ2qQuHCPZHzoSX+qAUCZxF1YAUJEP5a sQAKCRDCPZHzoSX+qF+mB/9gXu9C3BV0omDZBDWevJHxpWpOwQ8DxZEbk9b9LcrQlWdhFhyn xi+l5lRziV9ZGyYXp7N35a9t7GQJndMCFUWYoEa+1NCuxDs6bslfrCaGEGG/+wd6oIPb85xo 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t4kni9fGJHrh0D/qxsFvD3K5L33v9A+D0ChGE8XqFuFPmDgdblMptWB00pCfbQSLfKvO30z6v IdboL+hy/UThYt38y8tT4WSX2tbDR+KO/scEk7FifFi4RXX1zO0oZFoDkV2aCTkgRWCM1C2sr Ba/gXOfA2mel7IphiPz0ykN3MOKAIcUkN9Tc+mTdbFU6UaZKCnCNb6cO+Vyk1u5M1PVKKWmPt mKnsWmzkTu+HEnApVt6eKdSfOZeG9mfXkkcYmdkI9w94EOq7x7XfkdYnc1SBQT4pYZvWZg/7J 6RMRUy1XjMOjr0AEoCPA0k/92xyjSz+cslu1SRM2JqpBOBZcivZWIKjEn9BPEH4/wPyBuRhlw a1oXUYHdDnPekR6kom8ZQWQ= =E5=9C=A8 2025/8/4 09:27, Wang Yugui =E5=86=99=E9=81=93: > Hi, >=20 > similar deadlock of xfstests generic/475 and generic/648 on 6.12.41 with= some > 6.17 backport. >=20 > generic/475 > [47333.016017] sysrq: Show Blocked State > [47333.022309] task:kworker/u81:5 state:D stack:0 pid:1766531 tgid= :1766531 ppid:2 flags:0x00004000 > [47333.034537] Workqueue: writeback wb_workfn (flush-btrfs-3405) > [47333.042841] Call Trace: > [47333.047804] > [47333.052328] __schedule+0x278/0x540 > [47333.058191] ? __blk_flush_plug+0xf5/0x150 > [47333.064627] schedule+0x27/0xa0 > [47333.070102] io_schedule+0x46/0x70 > [47333.075814] folio_wait_bit_common+0x13d/0x390 > [47333.082550] ? folio_wait_bit_common+0x10b/0x390 > [47333.089414] ? __pfx_wake_page_function+0x10/0x10 > [47333.096317] __filemap_get_folio+0x289/0x3b0 > [47333.102754] cleanup_dirty_folios.isra.0+0xda/0x200 [btrfs] > [47333.110601] run_delalloc_nocow+0x4d7/0x6f0 [btrfs] There is a series related to this error handling path: https://lore.kernel.org/linux-btrfs/cover.1753687685.git.wqu@suse.com/ Which will keep the folio locked until error handling or the full range=20 successfully finished. If you can reliably hit the same error path, extra testing with that=20 series would be appreciated. Thanks, Qu > [47333.117665] ? __clear_extent_bit+0xc0/0x4f0 [btrfs] > [47333.124832] btrfs_run_delalloc_range+0x8e/0x2a0 [btrfs] > [47333.132369] writepage_delalloc+0x1fa/0x3e0 [btrfs] > [47333.139469] extent_writepage+0xdb/0x260 [btrfs] > [47333.146322] extent_write_cache_pages+0x18f/0x410 [btrfs] > [47333.153919] btrfs_writepages+0x74/0x100 [btrfs] > [47333.160717] do_writepages+0xd6/0x240 > [47333.166440] ? select_task_rq_fair+0x165/0x340 > [47333.172949] ? __smp_call_single_queue+0xb0/0x120 > [47333.179738] ? ttwu_queue_wakelist+0xf4/0x110 > [47333.186177] __writeback_single_inode+0x41/0x260 > [47333.192893] writeback_sb_inodes+0x21c/0x4e0 > [47333.199286] wb_writeback+0x88/0x310 > [47333.204899] wb_do_writeback+0x87/0x2b0 > [47333.210729] ? set_worker_desc+0xaf/0xc0 > [47333.216634] wb_workfn+0x49/0x150 > [47333.221958] process_one_work+0x179/0x3a0 > [47333.227986] worker_thread+0x24b/0x350 > [47333.233745] ? __pfx_worker_thread+0x10/0x10 > [47333.240036] kthread+0xde/0x110 > [47333.245151] ? __pfx_kthread+0x10/0x10 > [47333.250834] ret_from_fork+0x31/0x50 > [47333.256354] ? __pfx_kthread+0x10/0x10 > [47333.262048] ret_from_fork_asm+0x1a/0x30 > [47333.267937] > [47333.272060] task:btrfs-transacti state:D stack:0 pid:3056793 tgid= :3056793 ppid:2 flags:0x00004000 > [47333.283763] Call Trace: > [47333.288187] > [47333.292173] __schedule+0x278/0x540 > [47333.297555] schedule+0x27/0xa0 > [47333.302603] io_schedule+0x46/0x70 > [47333.307924] folio_wait_bit_common+0x13d/0x390 > [47333.314249] ? folio_wait_bit_common+0x10b/0x390 > [47333.320778] ? xas_init_marks+0x23/0x50 > [47333.326513] ? __pfx_wake_page_function+0x10/0x10 > [47333.333127] invalidate_inode_pages2_range+0x275/0x4c0 > [47333.340165] btrfs_destroy_all_delalloc_inodes+0x187/0x220 [btrfs] > [47333.348345] btrfs_cleanup_transaction.isra.0+0x389/0x3f0 [btrfs] > [47333.356454] transaction_kthread+0x107/0x1d0 [btrfs] > [47333.363413] ? __pfx_transaction_kthread+0x10/0x10 [btrfs] > [47333.370906] kthread+0xde/0x110 > [47333.375955] ? __pfx_kthread+0x10/0x10 > [47333.381626] ret_from_fork+0x31/0x50 > [47333.387100] ? __pfx_kthread+0x10/0x10 > [47333.392732] ret_from_fork_asm+0x1a/0x30 > [47333.398553] > [47333.402611] task:fsstress state:D stack:0 pid:3056799 tgid= :3056799 ppid:3056794 flags:0x00000006 > [47333.414306] Call Trace: > [47333.418668] > [47333.422658] __schedule+0x278/0x540 > [47333.428017] schedule+0x27/0xa0 > [47333.432966] wb_wait_for_completion+0x6b/0xa0 > [47333.439127] ? __pfx_autoremove_wake_function+0x10/0x10 > [47333.446183] __writeback_inodes_sb_nr+0xa2/0xd0 > [47333.452569] sync_filesystem+0x31/0xa0 > [47333.458162] __x64_sys_syncfs+0x41/0xa0 > [47333.463851] do_syscall_64+0x7d/0x160 > [47333.469360] ? __do_sys_newfstatat+0x35/0x60 > [47333.475492] ? file_close_fd+0x45/0x60 > [47333.481090] ? syscall_exit_to_user_mode+0x32/0x1b0 > [47333.487821] ? do_syscall_64+0x89/0x160 > [47333.493500] ? syscall_exit_to_user_mode+0x32/0x1b0 > [47333.500241] ? do_syscall_64+0x89/0x160 > [47333.505917] ? __do_sys_newfstatat+0x35/0x60 > [47333.512025] ? __x64_sys_ioctl+0xa6/0xc0 > [47333.517770] ? syscall_exit_to_user_mode+0x32/0x1b0 > [47333.524495] ? do_syscall_64+0x89/0x160 > [47333.530154] ? syscall_exit_to_user_mode+0x32/0x1b0 > [47333.536868] ? do_syscall_64+0x89/0x160 > [47333.542526] ? exc_page_fault+0x70/0x160 > [47333.548272] entry_SYSCALL_64_after_hwframe+0x76/0x7e > [47333.555147] RIP: 0033:0x7f8510704b8b > [47333.560547] RSP: 002b:00007fff6f808b78 EFLAGS: 00000202 ORIG_RAX: 000= 0000000000132 > [47333.570012] RAX: ffffffffffffffda RBX: 000000000007a120 RCX: 00007f85= 10704b8b > [47333.579026] RDX: 0000000000000000 RSI: 0000000031eb1450 RDI: 00000000= 00000004 > [47333.588051] RBP: 0000000000000004 R08: 0000000000000060 R09: 00007fff= 6f808b3c > [47333.597077] R10: 0000000000000000 R11: 0000000000000202 R12: 00000000= 0000073a > [47333.606092] R13: 8f5c28f5c28f5c29 R14: 00000000004045c0 R15: 00007f85= 10932b08 > [47333.615123] >=20 >=20 > generic/648: >=20 > [38896.856540] sysrq: Show Blocked State > [38896.863859] task:kworker/u81:9 state:D stack:0 pid:1771117 tgid= :1771117 ppid:2 flags:0x00004000 > [38896.877114] Workqueue: writeback wb_workfn (flush-btrfs-4069) > [38896.886454] Call Trace: > [38896.892401] > [38896.897932] __schedule+0x278/0x540 > [38896.904848] ? __blk_flush_plug+0xf5/0x150 > [38896.912373] schedule+0x27/0xa0 > [38896.918904] io_schedule+0x46/0x70 > [38896.925672] folio_wait_bit_common+0x13d/0x390 > [38896.933465] ? folio_wait_bit_common+0x10b/0x390 > [38896.941383] ? __pfx_wake_page_function+0x10/0x10 > [38896.949338] __filemap_get_folio+0x289/0x3b0 > [38896.956830] cleanup_dirty_folios.isra.0+0xda/0x200 [btrfs] > [38896.965742] run_delalloc_nocow+0x4d7/0x6f0 [btrfs] > [38896.973862] ? __clear_extent_bit+0x170/0x4f0 [btrfs] > [38896.982121] btrfs_run_delalloc_range+0x8e/0x2a0 [btrfs] > [38896.990622] writepage_delalloc+0x1fa/0x3e0 [btrfs] > [38896.998655] extent_writepage+0xdb/0x260 [btrfs] > [38897.006387] extent_write_cache_pages+0x18f/0x410 [btrfs] > [38897.014874] btrfs_writepages+0x74/0x100 [btrfs] > [38897.022545] do_writepages+0xd6/0x240 > [38897.029129] ? requeue_delayed_entity+0x8c/0x100 > [38897.036643] __writeback_single_inode+0x41/0x260 > [38897.044115] writeback_sb_inodes+0x21c/0x4e0 > [38897.051205] wb_writeback+0x88/0x310 > [38897.057606] wb_do_writeback+0x87/0x2b0 > [38897.064277] ? set_worker_desc+0xaf/0xc0 > [38897.071053] wb_workfn+0x49/0x150 > [38897.077226] process_one_work+0x179/0x3a0 > [38897.084068] worker_thread+0x24b/0x350 > [38897.090610] ? __pfx_worker_thread+0x10/0x10 > [38897.097665] kthread+0xde/0x110 > [38897.103542] ? __pfx_kthread+0x10/0x10 > [38897.110007] ret_from_fork+0x31/0x50 > [38897.116241] ? __pfx_kthread+0x10/0x10 > [38897.122598] ret_from_fork_asm+0x1a/0x30 > [38897.129098] > [38897.133829] task:btrfs-transacti state:D stack:0 pid:3363777 tgid= :3363777 ppid:2 flags:0x00004000 > [38897.146101] Call Trace: > [38897.151052] > [38897.155575] __schedule+0x278/0x540 > [38897.161482] schedule+0x27/0xa0 > [38897.167022] io_schedule+0x46/0x70 > [38897.172810] folio_wait_bit_common+0x13d/0x390 > [38897.179604] ? folio_wait_bit_common+0x10b/0x390 > [38897.186521] ? xas_init_marks+0x23/0x50 > [38897.192628] ? __pfx_wake_page_function+0x10/0x10 > [38897.199614] invalidate_inode_pages2_range+0x275/0x4c0 > [38897.207025] btrfs_destroy_all_delalloc_inodes+0x187/0x220 [btrfs] > [38897.215553] btrfs_cleanup_transaction.isra.0+0x389/0x3f0 [btrfs] > [38897.223978] transaction_kthread+0x107/0x1d0 [btrfs] > [38897.231246] ? __pfx_transaction_kthread+0x10/0x10 [btrfs] > [38897.239020] kthread+0xde/0x110 > [38897.244329] ? __pfx_kthread+0x10/0x10 > [38897.250208] ret_from_fork+0x31/0x50 > [38897.255854] ? __pfx_kthread+0x10/0x10 > [38897.261619] ret_from_fork_asm+0x1a/0x30 > [38897.267534] > [38897.271661] task:fsstress state:D stack:0 pid:3363784 tgid= :3363784 ppid:3363778 flags:0x00004006 > [38897.283430] Call Trace: > [38897.287824] > [38897.291824] __schedule+0x278/0x540 > [38897.297190] schedule+0x27/0xa0 > [38897.302188] wb_wait_for_completion+0x6b/0xa0 > [38897.308387] ? __pfx_autoremove_wake_function+0x10/0x10 > [38897.315428] sync_inodes_sb+0xc4/0x100 > [38897.320978] sync_filesystem+0x64/0xa0 > [38897.326529] __x64_sys_syncfs+0x41/0xa0 > [38897.332173] do_syscall_64+0x7d/0x160 > [38897.337642] ? syscall_exit_to_user_mode+0x32/0x1b0 > [38897.344341] ? do_syscall_64+0x89/0x160 > [38897.349994] ? exc_page_fault+0x70/0x160 > [38897.355733] entry_SYSCALL_64_after_hwframe+0x76/0x7e > [38897.362623] RIP: 0033:0x7f38d7504b8b > [38897.368019] RSP: 002b:00007fff09ab5f68 EFLAGS: 00000202 ORIG_RAX: 000= 0000000000132 > [38897.377470] RAX: ffffffffffffffda RBX: 000000000007a120 RCX: 00007f38= d7504b8b > [38897.386494] RDX: 0000000000000000 RSI: 0000000005d26450 RDI: 00000000= 00000004 > [38897.395514] RBP: 0000000000000004 R08: 0000000000000009 R09: 00000000= 05d32370 > [38897.404525] R10: 0000000000000000 R11: 0000000000000202 R12: 00000000= 00000783 > [38897.413517] R13: 8f5c28f5c28f5c29 R14: 00000000004045c0 R15: 00007f38= d7653b08 > [38897.422516] >=20 > And this is a server with ECC memory and no ECC warning/errror reported. >=20 > Is there any patch related to this problem? >=20 > Best Regards > Wang Yugui (wangyugui@e16-tech.com) > 2025/08/04 >=20 >=20 >=20