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Sat, 13 Sep 2025 17:58:00 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface Precedence: bulk X-Mailing-List: linux-btrfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Date: Sat, 13 Sep 2025 17:57:33 -0400 From: "Chris Murphy" To: "Btrfs BTRFS" Message-Id: Subject: 6.17rc5: btrfs scrub, Freezing user space processes failed Content-Type: text/plain Content-Transfer-Encoding: 7bit kernel 6.17.0-0.rc5.42.fc43.x86_64 btrfs-progs 6.16-1.fc42.x86_64 Scrub initiated, walked away, and when I come back it appears hung with a black screen unresponsive. I gave it maybe 30 seconds, gave up and forced power off. The journal preserved what was going on. full dmesg is attached here: https://bugzilla.redhat.com/show_bug.cgi?id=2394998 dmesg excerpt [ 8088.052124] kernel: BTRFS info (device dm-1): scrub: started on devid 1 [ 9662.647055] kernel: Lockdown: systemd-logind: hibernation is restricted; see man kernel_lockdown.7 [ 9662.689046] kernel: Lockdown: systemd-logind: hibernation is restricted; see man kernel_lockdown.7 [ 9662.793052] kernel: wlp0s20f3: deauthenticating from a4:22:49:b2:cb:a6 by local choice (Reason: 3=DEAUTH_LEAVING) [ 9727.984200] kernel: PM: suspend entry (deep) [ 9727.991082] kernel: Filesystems sync: 0.007 seconds [ 9748.172951] kernel: Freezing user space processes [ 9748.173350] kernel: Freezing user space processes failed after 20.001 seconds (1 tasks refusing to freeze, wq_busy=0): [ 9748.173520] kernel: task:btrfs state:D stack:0 pid:15156 tgid:15155 ppid:4043 task_flags:0x440140 flags:0x00004006 [ 9748.173653] kernel: Call Trace: [ 9748.173768] kernel: [ 9748.173884] kernel: __schedule+0x2f9/0x7b0 [ 9748.174026] kernel: schedule+0x27/0x80 [ 9748.174166] kernel: io_schedule+0x46/0x70 [ 9748.174295] kernel: blk_mq_get_tag+0x11d/0x2d0 [ 9748.174444] kernel: ? __pfx_autoremove_wake_function+0x10/0x10 [ 9748.174545] kernel: __blk_mq_alloc_requests+0xb0/0x2b0 [ 9748.174651] kernel: blk_mq_submit_bio+0x2c3/0x890 [ 9748.174764] kernel: __submit_bio+0x74/0x280 [ 9748.174855] kernel: __submit_bio_noacct+0x90/0x210 [ 9748.174925] kernel: btrfs_submit_chunk+0x1a2/0x6c0 [ 9748.175027] kernel: ? __pfx_scrub_read_endio+0x10/0x10 [ 9748.175118] kernel: btrfs_submit_bbio+0x1a/0x30 [ 9748.175184] kernel: submit_initial_group_read+0x8a/0x1d0 [ 9748.175264] kernel: scrub_simple_mirror+0x26f/0x310 [ 9748.175372] kernel: scrub_stripe+0x512/0x7a0 [ 9748.175445] kernel: scrub_chunk+0xd0/0x170 [ 9748.175508] kernel: scrub_enumerate_chunks+0x319/0x710 [ 9748.175571] kernel: btrfs_scrub_dev+0x225/0x660 [ 9748.175641] kernel: btrfs_ioctl+0xe77/0x15d0 [ 9748.175710] kernel: __x64_sys_ioctl+0x94/0xe0 [ 9748.175779] kernel: do_syscall_64+0x82/0x2c0 [ 9748.175848] kernel: ? __lruvec_stat_mod_folio+0x85/0xd0 [ 9748.175919] kernel: ? xas_load+0x11/0x100 [ 9748.176032] kernel: ? xas_find+0x83/0x1b0 [ 9748.176116] kernel: ? next_uptodate_folio+0xa0/0x350 [ 9748.176186] kernel: ? filemap_map_pages+0x35c/0x5a0 [ 9748.176255] kernel: ? memcg1_check_events+0x60/0x1d0 [ 9748.176325] kernel: ? do_read_fault+0x107/0x260 [ 9748.176393] kernel: ? handle_pte_fault+0x118/0x240 [ 9748.176461] kernel: ? do_fault+0x150/0x260 [ 9748.176523] kernel: ? __handle_mm_fault+0x551/0x6a0 [ 9748.176591] kernel: ? count_memcg_events+0xd6/0x220 [ 9748.176670] kernel: ? handle_mm_fault+0x248/0x360 [ 9748.176740] kernel: ? do_user_addr_fault+0x21a/0x690 [ 9748.176803] kernel: ? exc_page_fault+0x74/0x180 [ 9748.176873] kernel: entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 9748.176943] kernel: RIP: 0033:0x7f4a739060ed [ 9748.176996] kernel: RSP: 002b:00007f4a737aec50 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 9748.177102] kernel: RAX: ffffffffffffffda RBX: 000055e4140b79e0 RCX: 00007f4a739060ed [ 9748.177181] kernel: RDX: 000055e4140b79e0 RSI: 00000000c400941b RDI: 0000000000000003 [ 9748.177251] kernel: RBP: 00007f4a737aeca0 R08: 0000000000000020 R09: 31203a6b63617473 [ 9748.177330] kernel: R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4a737af6c0 [ 9748.177399] kernel: R13: 00007ffe1aba7a10 R14: 00007f4a737afcdc R15: 00007ffe1aba7b17 [ 9748.177461] kernel: [ 9748.177531] kernel: OOM killer enabled. [ 9748.177593] kernel: Restarting tasks: Starting [ 9748.177678] kernel: Restarting tasks: Done [ 9748.177746] kernel: random: crng reseeded on system resumption [ 9748.318065] kernel: PM: suspend exit [ 9748.318375] kernel: PM: suspend entry (s2idle) [ 9748.341048] kernel: Filesystems sync: 0.021 seconds [ 9768.348446] kernel: Freezing user space processes -- Chris Murphy