From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8C7F6C2D0B1 for ; Tue, 4 Feb 2020 12:50:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 472BE2087E for ; Tue, 4 Feb 2020 12:50:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (4096-bit key) header.d=orlives.de header.i=@orlives.de header.b="wmLOG4vN" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727168AbgBDMuQ (ORCPT ); Tue, 4 Feb 2020 07:50:16 -0500 Received: from mail.orlives.de ([148.251.55.246]:50164 "EHLO mail.orlives.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727126AbgBDMuQ (ORCPT ); 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prefer-encrypt=mutual; keydata= mQENBF4y2DoBCADCzwZ+V1tJOR2JK20uAVPkAOC5PdIe/UYCVZsYIbh8aIz0HsiqWeTCj3J8 nZEVKKm6fQRtyMILZeWNHQ98ck+1tmr4a6UQ4UDl+Xb1VuhU4frZI/d75olkn2JNwYcJJcdn MJ4WUZ8BWhmia+8ng+7nJ1yOw1ad0uS8dL+w+m+eimFr7HjIXUV/Y5I8NGhkROFDu72byMn1 OTaq4HFfgilYsDGu8AWUtn+ZBXmCDIYbvXANjDcyuGTTnS/vgyFx66rHOgZKqTafuSAC1k61 dAYvLlo06yb4S4VNwkW17ho9L6sgqfY5rFd+zQYnXdau7AK7TLAFywHgafHU20Ffv6PbABEB AAG0Gzx0LnNjaG1pdHRsYXVjaEBvcmxpdmVzLmRlPokBSQQQAQgAMwIZAQUCXjLYQAIbAwQL CQgHBhUICQoLAgMWAgEWIQSJFhEikPObK3+nglaeUEWy+uvFawAKCRCeUEWy+uvFa6UPCACt EeMFD8HIbP6vIfs0dQdYw7SyG/Ws/ZEhi61+HfBeltem2LMbcY3B1UNGWWt1px1oFq0sCd12 j8JhjTPyFoQv+vRDEygMk/OrXfnn32dl9Ttubgz68ktxjv6xQ2q+TGHStUCe9Q1opGqjWqV0 bqFV9nbpX5DX3urG4eDqjUrvUMasp3/RBBC6dSzRcutbmnFEUhbnQcG2JhxkUqJxErJO7Rs7 dw5wR+43zipZznrtP/W8nCmL7E8VYn3KWFSb4jSmMyYneqBrhSZMB/BfiOMrWnnMpPChRLyR GLqZoyhWDPZyAbKyjlVQVS3d9BtLn5PzNaYRAl9Gad8h+o/WWHGXuQENBF4y2DoBCACmbQWs /CCONpIwsHxKt4fEfbW1XhQFoKPmGF2Xonas6kN3Oh8XXFekkXfnRQJX+fOuv7DbaUsmkPzd TB2YtfidZJ6xIYPzSgSMsA945dEOY5yYfeNCH1pQYcq1xfM7bHGSwaNervx0wnK/g7yBgp6E 1stOwqoR9M3KgmQJPuaSISSfUH5NKcx38S6w+56I3//f1jyCRG5vkQzHsdioBWkAOfagQmcv 6fMhDYCoxlTooxlj1/5mSkspCS7fDkVcZn48t+sPfQAywpUDrWBZhp1vrDHfl+wUvCSXPYEz 9dkT9NmLz24H20tLV+btVgMsPXSlnM34lNjABg2x7isCoCZ9ABEBAAGJATYEGAEIACAFAl4y 2EACGwwWIQSJFhEikPObK3+nglaeUEWy+uvFawAKCRCeUEWy+uvFayO5CACDYH46Tay5BSwn FK3EwAYSpXIFzhQet7os7InGRS8/2yuqzsunRDbMy11rTGmXXA1LuTizqsgebQbALpkuHEpi gX9b20RfsfuZYbdbtLzzVDuOVuGP3+CSJrB1Z+nGeF1+L4m5n7VDPX0MyWKwhlWY9hVmNQ2+ lMt+fb6+330M9cXCz6H2/k7b2BTEM9xZPytt2ICT8I9rX5+8tuHDrstr13P40QOR0Exh5EHw LA00FYsr0e+ijzxRP9EC3AA9Gt/518IRS7FGvszu4qWWRT33P2cABoVUPpsybrhvuApgpf5y DLO17h0Vxwoq2qqCO/RqIw+o8Lj89xOl4VkPpXe4 Subject: btrfs scrub prevents system suspend Message-ID: <6055ac8f-b13d-85ed-7109-3314c5c71c1f@localhost> Date: Tue, 4 Feb 2020 13:44:38 +0100 Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="a7dRvWnDqXMr59N9K6VnyYwSufa4iIeNO" Authentication-Results: ORIGINATING; auth=pass smtp.auth=t.schmittlauch@orlives.de smtp.mailfrom=t.schmittlauch@orlives.de Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --a7dRvWnDqXMr59N9K6VnyYwSufa4iIeNO Content-Type: multipart/mixed; boundary="GIf1s07HPIygTrXfGPLPSI6bFLNkSomvX"; protected-headers="v1" From: Trolli Schmittlauch To: linux-btrfs@vger.kernel.org Message-ID: <6055ac8f-b13d-85ed-7109-3314c5c71c1f@localhost> Subject: btrfs scrub prevents system suspend --GIf1s07HPIygTrXfGPLPSI6bFLNkSomvX Content-Type: multipart/mixed; boundary="------------B0FC79D74FFA3842D9F1D651" Content-Language: en-US This is a multi-part message in MIME format. --------------B0FC79D74FFA3842D9F1D651 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hi I noticed that a running `btrfs scrub` operation prevents a system from s= uspending to RAM. I wonder whether this is a known issue and being worked= on. A kernel trace leading to btrfs scrub can be found attached. My current system setup: NixOS 19.09 kernel 4.19.98 btrfs-progs v5.2.1 I can also try to reproduce this issue with a more recent kernel version.= (am currently on a train with bad link) In the downstream bug report [1] suggests that this could be resolved/ wo= rked around in systemd by adding `Conflicts=3Dsuspend.target sleep.target= ? to the scrubbing service's systemd unit. So should this be managed at btrfs (kernel) level or in systemd? All the best schmittlauch [1] https://github.com/NixOS/nixpkgs/issues/79086 --------------B0FC79D74FFA3842D9F1D651 Content-Type: text/x-log; charset=UTF-8; name="btrfs-scrub-suspend_partial.log" Content-Transfer-Encoding: quoted-printable Content-Disposition: attachment; filename="btrfs-scrub-suspend_partial.log" systemd[1]: Starting Suspend... systemd-sleep[15702]: Suspending system... kernel: PM: Syncing filesystems ... done. kernel: Freezing user space processes ...=20 kernel: Freezing of tasks failed after 20.007 seconds (1 tasks refusing t= o freeze, wq_busy=3D0): kernel: btrfs D 0 12483 1 0x00000004 kernel: Call Trace: kernel: ? __schedule+0x1f4/0x820 kernel: ? scrub_missing_raid56_end_io+0x40/0x40 [btrfs] kernel: schedule+0x28/0x80 kernel: scrub_add_page_to_rd_bio+0x211/0x2c0 [btrfs] kernel: ? wait_woken+0x80/0x80 kernel: scrub_pages+0x239/0x430 [btrfs] kernel: scrub_stripe+0x72b/0xee0 [btrfs] kernel: ? kmem_cache_alloc+0x158/0x1c0 kernel: ? btrfs_check_space_for_delayed_refs+0xc7/0x100 [btrfs] kernel: ? btrfs_block_rsv_check+0x20/0x60 [btrfs] kernel: ? scrub_chunk+0xd2/0x130 [btrfs] kernel: scrub_chunk+0xd2/0x130 [btrfs] kernel: scrub_enumerate_chunks+0x20f/0x570 [btrfs] kernel: ? wait_woken+0x60/0x80 kernel: btrfs_scrub_dev+0x1e2/0x580 [btrfs] kernel: ? __kmalloc_track_caller+0x167/0x210 kernel: btrfs_ioctl+0xfea/0x31b0 [btrfs] kernel: ? __switch_to_asm+0x41/0x70 kernel: ? __switch_to_asm+0x35/0x70 kernel: ? __switch_to_asm+0x41/0x70 kernel: ? __switch_to_asm+0x35/0x70 kernel: ? do_vfs_ioctl+0xa4/0x620 kernel: do_vfs_ioctl+0xa4/0x620 kernel: ? __switch_to_asm+0x41/0x70 kernel: ? __switch_to_asm+0x35/0x70 kernel: ? __switch_to_asm+0x41/0x70 kernel: ? get_task_io_context+0x43/0x80 kernel: ksys_ioctl+0x60/0x90 kernel: ? __switch_to+0x115/0x440 kernel: __x64_sys_ioctl+0x16/0x20 kernel: do_syscall_64+0x4e/0x100 kernel: entry_SYSCALL_64_after_hwframe+0x44/0xa9 kernel: RIP: 0033:0x7f7da656cb57 kernel: Code: Bad RIP value. kernel: RSP: 002b:00007f7da647dd48 EFLAGS: 00000246 ORIG_RAX: 00000000000= 00010 kernel: RAX: ffffffffffffffda RBX: 0000000000b163e0 RCX: 00007f7da656cb57= kernel: RDX: 0000000000b163e0 RSI: 00000000c400941b RDI: 0000000000000003= kernel: RBP: 0000000000000000 R08: 00007f7da647e700 R09: 0000000000000000= kernel: R10: 00007f7da647e700 R11: 0000000000000246 R12: 00007ffd7f26ddce= kernel: R13: 00007ffd7f26ddcf R14: 00007f7da647e700 R15: 00007f7da67c9000= kernel: OOM killer enabled. kernel: Restarting tasks ... done. kernel: PM: suspend exit kernel: PM: suspend entry (s2idle) rtkit-daemon[2121]: Demoted 5 threads. kernel: PM: Syncing filesystems ... done. kernel: Freezing user space processes ...=20 kernel: Freezing of tasks failed after 20.001 seconds (1 tasks refusing t= o freeze, wq_busy=3D0): kernel: btrfs D 0 12483 1 0x00000004 kernel: Call Trace: kernel: ? __schedule+0x1f4/0x820 kernel: ? scrub_missing_raid56_end_io+0x40/0x40 [btrfs] kernel: schedule+0x28/0x80 kernel: scrub_add_page_to_rd_bio+0x211/0x2c0 [btrfs] kernel: ? wait_woken+0x80/0x80 kernel: scrub_pages+0x239/0x430 [btrfs] kernel: ? btrfs_lookup_csums_range+0x93/0x450 [btrfs] kernel: scrub_stripe+0x72b/0xee0 [btrfs] kernel: ? start_transaction+0xef/0x3f0 [btrfs] kernel: ? kmem_cache_alloc+0x158/0x1c0 kernel: ? btrfs_check_space_for_delayed_refs+0xc7/0x100 [btrfs] kernel: ? btrfs_block_rsv_check+0x20/0x60 [btrfs] kernel: ? scrub_chunk+0xd2/0x130 [btrfs] kernel: ? scrub_chunk+0xd2/0x130 [btrfs] kernel: ? scrub_enumerate_chunks+0x20f/0x570 [btrfs] kernel: ? wait_woken+0x60/0x80 kernel: ? btrfs_scrub_dev+0x1e2/0x580 [btrfs] kernel: ? __kmalloc_track_caller+0x167/0x210 kernel: ? btrfs_ioctl+0xfea/0x31b0 [btrfs] kernel: ? __switch_to_asm+0x41/0x70 kernel: ? __switch_to_asm+0x35/0x70 kernel: ? __switch_to_asm+0x41/0x70 kernel: ? __switch_to_asm+0x35/0x70 kernel: ? do_vfs_ioctl+0xa4/0x620 kernel: ? do_vfs_ioctl+0xa4/0x620 kernel: ? __switch_to_asm+0x41/0x70 kernel: ? __switch_to_asm+0x35/0x70 kernel: ? __switch_to_asm+0x41/0x70 kernel: ? get_task_io_context+0x43/0x80 kernel: ? ksys_ioctl+0x60/0x90 kernel: ? __switch_to+0x115/0x440 kernel: ? __x64_sys_ioctl+0x16/0x20 kernel: ? do_syscall_64+0x4e/0x100 kernel: ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 kernel: OOM killer enabled. kernel: Restarting tasks ... done. --------------B0FC79D74FFA3842D9F1D651-- --GIf1s07HPIygTrXfGPLPSI6bFLNkSomvX-- --a7dRvWnDqXMr59N9K6VnyYwSufa4iIeNO Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCgAdFiEEiRYRIpDzmyt/p4JWnlBFsvrrxWsFAl45ZzYACgkQnlBFsvrr xWs/RQf+PfVkTvTHmjaiVJ+gcQr8rY5lKCCGEsDIfpNhXHCVmoFzNG9s2pOW25RF 9RlBu19wk6QWNpLkYMkEvrZtNsc0/1oncGAMMXgGfYJywVwCZuWyoXZ8vXOHUk9X A8SjlB82GwF9hKHz2WzrzNB2vtXxLUg9dksRKL0loutqz2XgiNk89wDkVMcuMyRV Cthq2n38ilP7pqdhWFWtkgLPbmlSnoCmvRtieclpV1F/u1dJQNulZxQDco+NPrkh Uep+GF/9TnXsvrj8KKzifOV06nhyqKpj44EEMsD9t9X4oXbSlLAxILcFCYwBnVEe Zi654tjHvNZMi3dHz95dcsVGzEoQdQ== =FssW -----END PGP SIGNATURE----- --a7dRvWnDqXMr59N9K6VnyYwSufa4iIeNO--