From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from server.eikel.org (server.eikel.org [178.77.101.203]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2A47E36E46D; Thu, 2 Apr 2026 07:35:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=178.77.101.203 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775115348; cv=none; b=XzaLNFNL9AmLZTgnHSqBF/bR+XCfxf18u2vAL+aOg6yhFjMq72Pf05soBxH2wpZzQSicIYS3SXHjfgQ0kcMBluymUrI4MnQLnoqryLPyMb1IDKeu2SJ5gwdzW0qrUj42mKRCPGPUQ76OA1c3lJSsTq83OHoWwBv5G04XFRO9Cfw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775115348; c=relaxed/simple; bh=nYSAM2Lnu7FC6QuM/PLeRVuEp7nXU1kzgI4FP6N3wpc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Wm+z2NA0XT9iGAJqn2iG8b70AZ5KWFjjPd4VIB5s22jfOx/53LRz+GaiFayrunZ7tTDciPLf+G3Ada0kv60sTROSw6d+y3Tm2dmMwajATCyIl3Uu/qs+31Tp3lMFItt5mw8HkK74VeiTCFYlh5YlDWV/psLkYGyYmQqfyx+Ba7A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=eikel.org; spf=fail smtp.mailfrom=eikel.org; dkim=pass (1024-bit key) header.d=eikel.org header.i=@eikel.org header.b=cnkmK14W; arc=none smtp.client-ip=178.77.101.203 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=eikel.org Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=eikel.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=eikel.org header.i=@eikel.org header.b="cnkmK14W" Received: from thinkpad-benjamin.localnet (p200300fd1f05f100447f61f950b53eb3.dip0.t-ipconnect.de [IPv6:2003:fd:1f05:f100:447f:61f9:50b5:3eb3]) by server.eikel.org (Postfix) with ESMTPSA id 6D78B1F631; Thu, 2 Apr 2026 09:35:36 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=eikel.org; s=default; t=1775115336; bh=Eg2xsA2S2/jK9mgFSfOI1p5EFNHsaOXxfZPgvuVWqTk=; h=From:To:Subject; b=cnkmK14W6S/hou5wBZrfiIJx9bt0vDCahJ7yVSM3aw+ecgpuF9vLjTrk3Eau0W2Kr Smeays2VP5Pkl/O23LXGdRO8mFpozRcG3+GB+yfpsI1DKgHZwP51RuYh/QNM6s4ZUb 42Q6B9tJux7RA1rwlHbRJRA49BOr8XD2DkKUwBm0= Authentication-Results: server.eikel.org; spf=pass (sender IP is 2003:fd:1f05:f100:447f:61f9:50b5:3eb3) smtp.mailfrom=debian@eikel.org smtp.helo=thinkpad-benjamin.localnet Received-SPF: pass (server.eikel.org: connection is authenticated) From: Benjamin Eikel To: Thorsten Leemhuis Cc: linux-kernel@vger.kernel.org, Jens Axboe , linux-block@vger.kernel.org, Linux kernel regressions list Subject: Re: [BUG] RCU stall in blk_mq_timeout_work (potentially a regression in 6.19.7 or 6.19.8) Date: Thu, 02 Apr 2026 09:33:42 +0200 Message-ID: <5090885.31r3eYUQgx@thinkpad-benjamin> In-Reply-To: References: <21608811.f9utdCOAlc@thinkpad-benjamin> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Hi Thorsten and others, Am Dienstag, 31. M=C3=A4rz 2026, 10:32:30 Mitteleurop=C3=A4ische Sommerzeit= schrieb Thorsten Leemhuis: > [CCing the regressions list and Jens, the Block layer maintainer, who > might have an idea what's wrong here and/or how to best debug it] >=20 > On 3/27/26 20:28, Benjamin Eikel wrote: > > Dear Linux kernel developers, > >=20 > > I experience repeated RCU stalls in blk_mq_timeout_work causing system > > freezes. The NVMe drive (more info at the end) shows no errors or > > controller resets in the kernel log: the hardware appears healthy. No I= /O > > timeout messages precede the stalls. > >=20 > > The stall cascades: khugepaged blocks on __lru_add_drain_all waiting fo= r a > > workqueue flush that cannot complete, and additional kworkers block on a > > mutex held by the kblockd rescuer thread. The system becomes noticeably > > unresponsive and then I notice it in the logs. > >=20 > > In case the logs are too condensed, please tell me and I can provide th= em > > fully. If you have pointers on how this could be reproduced and a commit > > range,>=20 > > I could try to bisect the problem. >=20 > A bisection with mainline would help a lot. Maybe doing it between > 6.19.6 and 6.19.8 (which would be quicker) might work out, too (but > normally it's best to focus on mainline). I have not yet done this because I do not have a reliable way to reproduce = it. >=20 > And this is not my area of expertise, but I noticed that some RCU fixes > went into -rc6, so might be wise to try that first. I encountered this issue with -rc6 (see log below, same config). I suspect = that this only happens after the notebook has previously been suspended. Kind regards Benjamin =3D=3D Trace from Linux version 7.0.0-rc6 (1=E2=80=932 April) =3D=3D Apr 01 20:36:59 thinkpad-benjamin kernel: Linux version 7.0.0-rc6-70-rc6 (b= enjamin@thinkpad-benjamin) (gcc (Debian 15.2.0-16) 15.2.0, GNU ld (GNU Binu= tils for Debian) 2.46) #24 SMP PREEMPT_DYNAMIC Tue Mar 31 14:36:43 CEST 2026 Apr 01 20:36:59 thinkpad-benjamin kernel: Command line: BOOT_IMAGE=3D/vmlin= uz-7.0.0-rc6-70-rc6 root=3D/dev/mapper/thinkpad--benjamin--vg-root ro quiet [=E2=80=A6] Apr 01 21:06:54 thinkpad-benjamin kernel: PM: suspend entry (s2idle) [=E2=80=A6] Apr 02 08:44:55 thinkpad-benjamin kernel: PM: suspend exit [=E2=80=A6] Apr 02 08:50:59 thinkpad-benjamin kernel: INFO: task khugepaged:138 blocked= for more than 120 seconds. Apr 02 08:50:59 thinkpad-benjamin kernel: Not tainted 7.0.0-rc6-70-rc= 6 #24 Apr 02 08:50:59 thinkpad-benjamin kernel: "echo 0 > /proc/sys/kernel/hung_t= ask_timeout_secs" disables this message. Apr 02 08:50:59 thinkpad-benjamin kernel: task:khugepaged state:D stac= k:0 pid:138 tgid:138 ppid:2 task_flags:0x200040 flags:0x000800= 00 Apr 02 08:50:59 thinkpad-benjamin kernel: Call Trace: Apr 02 08:50:59 thinkpad-benjamin kernel: Apr 02 08:50:59 thinkpad-benjamin kernel: __schedule+0x47c/0x1000 Apr 02 08:50:59 thinkpad-benjamin kernel: schedule+0x27/0xd0 Apr 02 08:50:59 thinkpad-benjamin kernel: schedule_timeout+0xbd/0x100 Apr 02 08:50:59 thinkpad-benjamin kernel: wait_for_completion+0x8a/0x140 Apr 02 08:50:59 thinkpad-benjamin kernel: __flush_work+0x276/0x3b0 Apr 02 08:50:59 thinkpad-benjamin kernel: ? __pfx_wq_barrier_func+0x10/0x10 Apr 02 08:50:59 thinkpad-benjamin kernel: __lru_add_drain_all+0x198/0x2b0 Apr 02 08:50:59 thinkpad-benjamin kernel: khugepaged+0x65/0x950 Apr 02 08:50:59 thinkpad-benjamin kernel: ? __pfx_autoremove_wake_function= +0x10/0x10 Apr 02 08:50:59 thinkpad-benjamin kernel: ? __pfx_khugepaged+0x10/0x10 Apr 02 08:50:59 thinkpad-benjamin kernel: kthread+0xe3/0x120 Apr 02 08:50:59 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:50:59 thinkpad-benjamin kernel: ret_from_fork+0x2c9/0x360 Apr 02 08:50:59 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:50:59 thinkpad-benjamin kernel: ret_from_fork_asm+0x1a/0x30 Apr 02 08:50:59 thinkpad-benjamin kernel: Apr 02 08:53:00 thinkpad-benjamin kernel: INFO: task khugepaged:138 blocked= for more than 241 seconds. Apr 02 08:53:00 thinkpad-benjamin kernel: Not tainted 7.0.0-rc6-70-rc= 6 #24 Apr 02 08:53:00 thinkpad-benjamin kernel: "echo 0 > /proc/sys/kernel/hung_t= ask_timeout_secs" disables this message. Apr 02 08:53:00 thinkpad-benjamin kernel: task:khugepaged state:D stac= k:0 pid:138 tgid:138 ppid:2 task_flags:0x200040 flags:0x000800= 00 Apr 02 08:53:00 thinkpad-benjamin kernel: Call Trace: Apr 02 08:53:00 thinkpad-benjamin kernel: Apr 02 08:53:00 thinkpad-benjamin kernel: __schedule+0x47c/0x1000 Apr 02 08:53:00 thinkpad-benjamin kernel: schedule+0x27/0xd0 Apr 02 08:53:00 thinkpad-benjamin kernel: schedule_timeout+0xbd/0x100 Apr 02 08:53:00 thinkpad-benjamin kernel: wait_for_completion+0x8a/0x140 Apr 02 08:53:00 thinkpad-benjamin kernel: __flush_work+0x276/0x3b0 Apr 02 08:53:00 thinkpad-benjamin kernel: ? __pfx_wq_barrier_func+0x10/0x10 Apr 02 08:53:00 thinkpad-benjamin kernel: __lru_add_drain_all+0x198/0x2b0 Apr 02 08:53:00 thinkpad-benjamin kernel: khugepaged+0x65/0x950 Apr 02 08:53:00 thinkpad-benjamin kernel: ? __pfx_autoremove_wake_function= +0x10/0x10 Apr 02 08:53:00 thinkpad-benjamin kernel: ? __pfx_khugepaged+0x10/0x10 Apr 02 08:53:00 thinkpad-benjamin kernel: kthread+0xe3/0x120 Apr 02 08:53:00 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:53:00 thinkpad-benjamin kernel: ret_from_fork+0x2c9/0x360 Apr 02 08:53:00 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:53:00 thinkpad-benjamin kernel: ret_from_fork_asm+0x1a/0x30 Apr 02 08:53:00 thinkpad-benjamin kernel: Apr 02 08:55:00 thinkpad-benjamin kernel: INFO: task khugepaged:138 blocked= for more than 362 seconds. Apr 02 08:55:00 thinkpad-benjamin kernel: Not tainted 7.0.0-rc6-70-rc= 6 #24 Apr 02 08:55:00 thinkpad-benjamin kernel: "echo 0 > /proc/sys/kernel/hung_t= ask_timeout_secs" disables this message. Apr 02 08:55:00 thinkpad-benjamin kernel: task:khugepaged state:D stac= k:0 pid:138 tgid:138 ppid:2 task_flags:0x200040 flags:0x000800= 00 Apr 02 08:55:00 thinkpad-benjamin kernel: Call Trace: Apr 02 08:55:00 thinkpad-benjamin kernel: Apr 02 08:55:00 thinkpad-benjamin kernel: __schedule+0x47c/0x1000 Apr 02 08:55:00 thinkpad-benjamin kernel: schedule+0x27/0xd0 Apr 02 08:55:00 thinkpad-benjamin kernel: schedule_timeout+0xbd/0x100 Apr 02 08:55:00 thinkpad-benjamin kernel: wait_for_completion+0x8a/0x140 Apr 02 08:55:00 thinkpad-benjamin kernel: __flush_work+0x276/0x3b0 Apr 02 08:55:00 thinkpad-benjamin kernel: ? __pfx_wq_barrier_func+0x10/0x10 Apr 02 08:55:00 thinkpad-benjamin kernel: __lru_add_drain_all+0x198/0x2b0 Apr 02 08:55:00 thinkpad-benjamin kernel: khugepaged+0x65/0x950 Apr 02 08:55:00 thinkpad-benjamin kernel: ? __pfx_autoremove_wake_function= +0x10/0x10 Apr 02 08:55:00 thinkpad-benjamin kernel: ? __pfx_khugepaged+0x10/0x10 Apr 02 08:55:00 thinkpad-benjamin kernel: kthread+0xe3/0x120 Apr 02 08:55:00 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:55:00 thinkpad-benjamin kernel: ret_from_fork+0x2c9/0x360 Apr 02 08:55:00 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:55:00 thinkpad-benjamin kernel: ret_from_fork_asm+0x1a/0x30 Apr 02 08:55:00 thinkpad-benjamin kernel: Apr 02 08:57:01 thinkpad-benjamin kernel: INFO: task khugepaged:138 blocked= for more than 483 seconds. Apr 02 08:57:01 thinkpad-benjamin kernel: Not tainted 7.0.0-rc6-70-rc= 6 #24 Apr 02 08:57:01 thinkpad-benjamin kernel: "echo 0 > /proc/sys/kernel/hung_t= ask_timeout_secs" disables this message. Apr 02 08:57:01 thinkpad-benjamin kernel: task:khugepaged state:D stac= k:0 pid:138 tgid:138 ppid:2 task_flags:0x200040 flags:0x000800= 00 Apr 02 08:57:01 thinkpad-benjamin kernel: Call Trace: Apr 02 08:57:01 thinkpad-benjamin kernel: Apr 02 08:57:01 thinkpad-benjamin kernel: __schedule+0x47c/0x1000 Apr 02 08:57:01 thinkpad-benjamin kernel: schedule+0x27/0xd0 Apr 02 08:57:01 thinkpad-benjamin kernel: schedule_timeout+0xbd/0x100 Apr 02 08:57:01 thinkpad-benjamin kernel: wait_for_completion+0x8a/0x140 Apr 02 08:57:01 thinkpad-benjamin kernel: __flush_work+0x276/0x3b0 Apr 02 08:57:01 thinkpad-benjamin kernel: ? __pfx_wq_barrier_func+0x10/0x10 Apr 02 08:57:01 thinkpad-benjamin kernel: __lru_add_drain_all+0x198/0x2b0 Apr 02 08:57:01 thinkpad-benjamin kernel: khugepaged+0x65/0x950 Apr 02 08:57:01 thinkpad-benjamin kernel: ? __pfx_autoremove_wake_function= +0x10/0x10 Apr 02 08:57:01 thinkpad-benjamin kernel: ? __pfx_khugepaged+0x10/0x10 Apr 02 08:57:01 thinkpad-benjamin kernel: kthread+0xe3/0x120 Apr 02 08:57:01 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:57:01 thinkpad-benjamin kernel: ret_from_fork+0x2c9/0x360 Apr 02 08:57:01 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:57:01 thinkpad-benjamin kernel: ret_from_fork_asm+0x1a/0x30 Apr 02 08:57:01 thinkpad-benjamin kernel: Apr 02 08:59:02 thinkpad-benjamin kernel: INFO: task kworker/u64:14:126 blo= cked for more than 120 seconds. Apr 02 08:59:02 thinkpad-benjamin kernel: Not tainted 7.0.0-rc6-70-rc= 6 #24 Apr 02 08:59:02 thinkpad-benjamin kernel: "echo 0 > /proc/sys/kernel/hung_t= ask_timeout_secs" disables this message. Apr 02 08:59:02 thinkpad-benjamin kernel: task:kworker/u64:14 state:D stac= k:0 pid:126 tgid:126 ppid:2 task_flags:0x4208060 flags:0x00080= 000 Apr 02 08:59:02 thinkpad-benjamin kernel: Workqueue: events_unbound idle_cu= ll_fn Apr 02 08:59:02 thinkpad-benjamin kernel: Call Trace: Apr 02 08:59:02 thinkpad-benjamin kernel: Apr 02 08:59:02 thinkpad-benjamin kernel: __schedule+0x47c/0x1000 Apr 02 08:59:02 thinkpad-benjamin kernel: schedule+0x27/0xd0 Apr 02 08:59:02 thinkpad-benjamin kernel: schedule_preempt_disabled+0x15/0= x30 Apr 02 08:59:02 thinkpad-benjamin kernel: __mutex_lock.constprop.0+0x54b/0= xac0 Apr 02 08:59:02 thinkpad-benjamin kernel: ? ttwu_queue_wakelist+0x13c/0x230 Apr 02 08:59:02 thinkpad-benjamin kernel: idle_cull_fn+0x3e/0x170 Apr 02 08:59:02 thinkpad-benjamin kernel: process_one_work+0x19d/0x3a0 Apr 02 08:59:02 thinkpad-benjamin kernel: worker_thread+0x1af/0x320 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_worker_thread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: kthread+0xe3/0x120 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ret_from_fork+0x2c9/0x360 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ret_from_fork_asm+0x1a/0x30 Apr 02 08:59:02 thinkpad-benjamin kernel: Apr 02 08:59:02 thinkpad-benjamin kernel: INFO: task kworker/u64:14:126 is = blocked on a mutex likely owned by task kworker/R-kbloc:139. Apr 02 08:59:02 thinkpad-benjamin kernel: task:kworker/R-kbloc state:R run= ning task stack:0 pid:139 tgid:139 ppid:2 task_flags:0x420= 8060 flags:0x00080000 Apr 02 08:59:02 thinkpad-benjamin kernel: Call Trace: Apr 02 08:59:02 thinkpad-benjamin kernel: Apr 02 08:59:02 thinkpad-benjamin kernel: __schedule+0x47c/0x1000 Apr 02 08:59:02 thinkpad-benjamin kernel: preempt_schedule_irq+0x38/0x60 Apr 02 08:59:02 thinkpad-benjamin kernel: asm_common_interrupt+0x26/0x40 Apr 02 08:59:02 thinkpad-benjamin kernel: RIP: 0010:affine_move_task+0x198/= 0x580 Apr 02 08:59:02 thinkpad-benjamin kernel: Code: 00 49 8b 36 48 8d bb ec 0d = 00 00 e8 22 8a d9 00 45 85 ff 44 8b 04 24 0f 84 21 02 00 00 65 ff 0d 4e 73 = 8b 02 0f 84 6f 03 00 00 <41> 83 e0 04 49 8d 7c 24 08 75 3e e8 18 09 d9 00 b= 8 ff ff ff ff f0 Apr 02 08:59:02 thinkpad-benjamin kernel: RSP: 0018:ffffcc5f4063fcd8 EFLAGS= : 00000246 Apr 02 08:59:02 thinkpad-benjamin kernel: RAX: 0000000000000001 RBX: ffff8a= f641ab2180 RCX: 0000000000000004 Apr 02 08:59:02 thinkpad-benjamin kernel: RDX: 0000000000000000 RSI: 000000= 0000000283 RDI: ffff8af640c08dec Apr 02 08:59:02 thinkpad-benjamin kernel: RBP: ffff8b04a1eb2100 R08: 000000= 0000000000 R09: 0000000000000283 Apr 02 08:59:02 thinkpad-benjamin kernel: R10: 0000000000000002 R11: 000000= 0000000000 R12: ffffcc5f4063fd28 Apr 02 08:59:02 thinkpad-benjamin kernel: R13: ffffcc5f4063fd28 R14: ffffcc= 5f4063fde0 R15: 0000000000000000 Apr 02 08:59:02 thinkpad-benjamin kernel: ? affine_move_task+0x50c/0x580 Apr 02 08:59:02 thinkpad-benjamin kernel: ? srso_alias_return_thunk+0x5/0x= fbef5 Apr 02 08:59:02 thinkpad-benjamin kernel: ? set_next_entity+0xe7/0x270 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_migration_cpu_stop+0x10/= 0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ? affine_move_task+0x3c8/0x580 Apr 02 08:59:02 thinkpad-benjamin kernel: __set_cpus_allowed_ptr+0x66/0xc0 Apr 02 08:59:02 thinkpad-benjamin kernel: set_cpus_allowed_ptr+0x3a/0x60 Apr 02 08:59:02 thinkpad-benjamin kernel: worker_attach_to_pool+0x5f/0xd0 Apr 02 08:59:02 thinkpad-benjamin kernel: rescuer_thread+0x12d/0x5d0 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_rescuer_thread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: kthread+0xe3/0x120 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ret_from_fork+0x2c9/0x360 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ret_from_fork_asm+0x1a/0x30 Apr 02 08:59:02 thinkpad-benjamin kernel: Apr 02 08:59:02 thinkpad-benjamin kernel: INFO: task khugepaged:138 blocked= for more than 604 seconds. Apr 02 08:59:02 thinkpad-benjamin kernel: Not tainted 7.0.0-rc6-70-rc= 6 #24 Apr 02 08:59:02 thinkpad-benjamin kernel: "echo 0 > /proc/sys/kernel/hung_t= ask_timeout_secs" disables this message. Apr 02 08:59:02 thinkpad-benjamin kernel: task:khugepaged state:D stac= k:0 pid:138 tgid:138 ppid:2 task_flags:0x200040 flags:0x000800= 00 Apr 02 08:59:02 thinkpad-benjamin kernel: Call Trace: Apr 02 08:59:02 thinkpad-benjamin kernel: Apr 02 08:59:02 thinkpad-benjamin kernel: __schedule+0x47c/0x1000 Apr 02 08:59:02 thinkpad-benjamin kernel: schedule+0x27/0xd0 Apr 02 08:59:02 thinkpad-benjamin kernel: schedule_timeout+0xbd/0x100 Apr 02 08:59:02 thinkpad-benjamin kernel: wait_for_completion+0x8a/0x140 Apr 02 08:59:02 thinkpad-benjamin kernel: __flush_work+0x276/0x3b0 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_wq_barrier_func+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: __lru_add_drain_all+0x198/0x2b0 Apr 02 08:59:02 thinkpad-benjamin kernel: khugepaged+0x65/0x950 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_autoremove_wake_function= +0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_khugepaged+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: kthread+0xe3/0x120 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ret_from_fork+0x2c9/0x360 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ret_from_fork_asm+0x1a/0x30 Apr 02 08:59:02 thinkpad-benjamin kernel: Apr 02 08:59:02 thinkpad-benjamin kernel: INFO: task kworker/u64:16:5369 bl= ocked for more than 120 seconds. Apr 02 08:59:02 thinkpad-benjamin kernel: Not tainted 7.0.0-rc6-70-rc= 6 #24 Apr 02 08:59:02 thinkpad-benjamin kernel: "echo 0 > /proc/sys/kernel/hung_t= ask_timeout_secs" disables this message. Apr 02 08:59:02 thinkpad-benjamin kernel: task:kworker/u64:16 state:D stac= k:0 pid:5369 tgid:5369 ppid:2 task_flags:0x4208060 flags:0x00080= 000 Apr 02 08:59:02 thinkpad-benjamin kernel: Workqueue: events_unbound idle_cu= ll_fn Apr 02 08:59:02 thinkpad-benjamin kernel: Call Trace: Apr 02 08:59:02 thinkpad-benjamin kernel: Apr 02 08:59:02 thinkpad-benjamin kernel: __schedule+0x47c/0x1000 Apr 02 08:59:02 thinkpad-benjamin kernel: schedule+0x27/0xd0 Apr 02 08:59:02 thinkpad-benjamin kernel: schedule_preempt_disabled+0x15/0= x30 Apr 02 08:59:02 thinkpad-benjamin kernel: __mutex_lock.constprop.0+0x54b/0= xac0 Apr 02 08:59:02 thinkpad-benjamin kernel: ? finish_task_switch.isra.0+0x96= /0x2c0 Apr 02 08:59:02 thinkpad-benjamin kernel: idle_cull_fn+0x3e/0x170 Apr 02 08:59:02 thinkpad-benjamin kernel: process_one_work+0x19d/0x3a0 Apr 02 08:59:02 thinkpad-benjamin kernel: worker_thread+0x1af/0x320 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_worker_thread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: kthread+0xe3/0x120 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ret_from_fork+0x2c9/0x360 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ret_from_fork_asm+0x1a/0x30 Apr 02 08:59:02 thinkpad-benjamin kernel: Apr 02 08:59:02 thinkpad-benjamin kernel: INFO: task kworker/u64:16:5369 is= blocked on a mutex likely owned by task kworker/R-kbloc:139. Apr 02 08:59:02 thinkpad-benjamin kernel: task:kworker/R-kbloc state:R run= ning task stack:0 pid:139 tgid:139 ppid:2 task_flags:0x420= 8060 flags:0x00080000 Apr 02 08:59:02 thinkpad-benjamin kernel: Call Trace: Apr 02 08:59:02 thinkpad-benjamin kernel: Apr 02 08:59:02 thinkpad-benjamin kernel: ? __schedule+0x484/0x1000 Apr 02 08:59:02 thinkpad-benjamin kernel: ? preempt_schedule_irq+0x38/0x60 Apr 02 08:59:02 thinkpad-benjamin kernel: ? asm_common_interrupt+0x26/0x40 Apr 02 08:59:02 thinkpad-benjamin kernel: ? affine_move_task+0x198/0x580 Apr 02 08:59:02 thinkpad-benjamin kernel: ? affine_move_task+0x50c/0x580 Apr 02 08:59:02 thinkpad-benjamin kernel: ? srso_alias_return_thunk+0x5/0x= fbef5 Apr 02 08:59:02 thinkpad-benjamin kernel: ? set_next_entity+0xe7/0x270 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_migration_cpu_stop+0x10/= 0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ? affine_move_task+0x3c8/0x580 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __set_cpus_allowed_ptr+0x66/0x= c0 Apr 02 08:59:02 thinkpad-benjamin kernel: ? set_cpus_allowed_ptr+0x3a/0x60 Apr 02 08:59:02 thinkpad-benjamin kernel: ? worker_attach_to_pool+0x5f/0xd0 Apr 02 08:59:02 thinkpad-benjamin kernel: ? rescuer_thread+0x12d/0x5d0 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_rescuer_thread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ? kthread+0xe3/0x120 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ? ret_from_fork+0x2c9/0x360 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ? ret_from_fork_asm+0x1a/0x30 Apr 02 08:59:02 thinkpad-benjamin kernel: Apr 02 08:59:02 thinkpad-benjamin kernel: INFO: task kworker/u64:12:9088 bl= ocked for more than 120 seconds. Apr 02 08:59:02 thinkpad-benjamin kernel: Not tainted 7.0.0-rc6-70-rc= 6 #24 Apr 02 08:59:02 thinkpad-benjamin kernel: "echo 0 > /proc/sys/kernel/hung_t= ask_timeout_secs" disables this message. Apr 02 08:59:02 thinkpad-benjamin kernel: task:kworker/u64:12 state:D stac= k:0 pid:9088 tgid:9088 ppid:2 task_flags:0x4208060 flags:0x00080= 000 Apr 02 08:59:02 thinkpad-benjamin kernel: Workqueue: events_unbound idle_cu= ll_fn Apr 02 08:59:02 thinkpad-benjamin kernel: Call Trace: Apr 02 08:59:02 thinkpad-benjamin kernel: Apr 02 08:59:02 thinkpad-benjamin kernel: __schedule+0x47c/0x1000 Apr 02 08:59:02 thinkpad-benjamin kernel: schedule+0x27/0xd0 Apr 02 08:59:02 thinkpad-benjamin kernel: schedule_preempt_disabled+0x15/0= x30 Apr 02 08:59:02 thinkpad-benjamin kernel: __mutex_lock.constprop.0+0x54b/0= xac0 Apr 02 08:59:02 thinkpad-benjamin kernel: idle_cull_fn+0x3e/0x170 Apr 02 08:59:02 thinkpad-benjamin kernel: process_one_work+0x19d/0x3a0 Apr 02 08:59:02 thinkpad-benjamin kernel: worker_thread+0x1af/0x320 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_worker_thread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: kthread+0xe3/0x120 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ret_from_fork+0x2c9/0x360 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ret_from_fork_asm+0x1a/0x30 Apr 02 08:59:02 thinkpad-benjamin kernel: Apr 02 08:59:02 thinkpad-benjamin kernel: INFO: task kworker/u64:12:9088 is= blocked on a mutex likely owned by task kworker/R-kbloc:139. Apr 02 08:59:02 thinkpad-benjamin kernel: task:kworker/R-kbloc state:R run= ning task stack:0 pid:139 tgid:139 ppid:2 task_flags:0x420= 8060 flags:0x00080000 Apr 02 08:59:02 thinkpad-benjamin kernel: Call Trace: Apr 02 08:59:02 thinkpad-benjamin kernel: Apr 02 08:59:02 thinkpad-benjamin kernel: __schedule+0x47c/0x1000 Apr 02 08:59:02 thinkpad-benjamin kernel: preempt_schedule_irq+0x38/0x60 Apr 02 08:59:02 thinkpad-benjamin kernel: asm_common_interrupt+0x26/0x40 Apr 02 08:59:02 thinkpad-benjamin kernel: RIP: 0010:affine_move_task+0x198/= 0x580 Apr 02 08:59:02 thinkpad-benjamin kernel: Code: 00 49 8b 36 48 8d bb ec 0d = 00 00 e8 22 8a d9 00 45 85 ff 44 8b 04 24 0f 84 21 02 00 00 65 ff 0d 4e 73 = 8b 02 0f 84 6f 03 00 00 <41> 83 e0 04 49 8d 7c 24 08 75 3e e8 18 09 d9 00 b= 8 ff ff ff ff f0 Apr 02 08:59:02 thinkpad-benjamin kernel: RSP: 0018:ffffcc5f4063fcd8 EFLAGS= : 00000246 Apr 02 08:59:02 thinkpad-benjamin kernel: RAX: 0000000000000001 RBX: ffff8a= f641ab2180 RCX: 0000000000000004 Apr 02 08:59:02 thinkpad-benjamin kernel: RDX: 0000000000000000 RSI: 000000= 0000000283 RDI: ffff8af640c08dec Apr 02 08:59:02 thinkpad-benjamin kernel: RBP: ffff8b04a1eb2100 R08: 000000= 0000000000 R09: 0000000000000283 Apr 02 08:59:02 thinkpad-benjamin kernel: R10: 0000000000000002 R11: 000000= 0000000000 R12: ffffcc5f4063fd28 Apr 02 08:59:02 thinkpad-benjamin kernel: R13: ffffcc5f4063fd28 R14: ffffcc= 5f4063fde0 R15: 0000000000000000 Apr 02 08:59:02 thinkpad-benjamin kernel: ? affine_move_task+0x50c/0x580 Apr 02 08:59:02 thinkpad-benjamin kernel: ? srso_alias_return_thunk+0x5/0x= fbef5 Apr 02 08:59:02 thinkpad-benjamin kernel: ? set_next_entity+0xe7/0x270 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_migration_cpu_stop+0x10/= 0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ? affine_move_task+0x3c8/0x580 Apr 02 08:59:02 thinkpad-benjamin kernel: __set_cpus_allowed_ptr+0x66/0xc0 Apr 02 08:59:02 thinkpad-benjamin kernel: set_cpus_allowed_ptr+0x3a/0x60 Apr 02 08:59:02 thinkpad-benjamin kernel: worker_attach_to_pool+0x5f/0xd0 Apr 02 08:59:02 thinkpad-benjamin kernel: rescuer_thread+0x12d/0x5d0 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_rescuer_thread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: kthread+0xe3/0x120 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ret_from_fork+0x2c9/0x360 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ret_from_fork_asm+0x1a/0x30 Apr 02 08:59:02 thinkpad-benjamin kernel: Apr 02 08:59:02 thinkpad-benjamin kernel: INFO: task kworker/u64:22:10249 b= locked for more than 120 seconds. Apr 02 08:59:02 thinkpad-benjamin kernel: Not tainted 7.0.0-rc6-70-rc= 6 #24 Apr 02 08:59:02 thinkpad-benjamin kernel: "echo 0 > /proc/sys/kernel/hung_t= ask_timeout_secs" disables this message. Apr 02 08:59:02 thinkpad-benjamin kernel: task:kworker/u64:22 state:D stac= k:0 pid:10249 tgid:10249 ppid:2 task_flags:0x4208060 flags:0x00080= 000 Apr 02 08:59:02 thinkpad-benjamin kernel: Workqueue: events_unbound idle_cu= ll_fn Apr 02 08:59:02 thinkpad-benjamin kernel: Call Trace: Apr 02 08:59:02 thinkpad-benjamin kernel: Apr 02 08:59:02 thinkpad-benjamin kernel: __schedule+0x47c/0x1000 Apr 02 08:59:02 thinkpad-benjamin kernel: schedule+0x27/0xd0 Apr 02 08:59:02 thinkpad-benjamin kernel: schedule_preempt_disabled+0x15/0= x30 Apr 02 08:59:02 thinkpad-benjamin kernel: __mutex_lock.constprop.0+0x54b/0= xac0 Apr 02 08:59:02 thinkpad-benjamin kernel: ? finish_task_switch.isra.0+0x96= /0x2c0 Apr 02 08:59:02 thinkpad-benjamin kernel: idle_cull_fn+0x3e/0x170 Apr 02 08:59:02 thinkpad-benjamin kernel: process_one_work+0x19d/0x3a0 Apr 02 08:59:02 thinkpad-benjamin kernel: worker_thread+0x1af/0x320 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_worker_thread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: kthread+0xe3/0x120 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ret_from_fork+0x2c9/0x360 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ret_from_fork_asm+0x1a/0x30 Apr 02 08:59:02 thinkpad-benjamin kernel: Apr 02 08:59:02 thinkpad-benjamin kernel: INFO: task kworker/u64:22:10249 i= s blocked on a mutex likely owned by task kworker/R-kbloc:139. Apr 02 08:59:02 thinkpad-benjamin kernel: task:kworker/R-kbloc state:R run= ning task stack:0 pid:139 tgid:139 ppid:2 task_flags:0x420= 8060 flags:0x00080000 Apr 02 08:59:02 thinkpad-benjamin kernel: Call Trace: Apr 02 08:59:02 thinkpad-benjamin kernel: Apr 02 08:59:02 thinkpad-benjamin kernel: __schedule+0x47c/0x1000 Apr 02 08:59:02 thinkpad-benjamin kernel: preempt_schedule_irq+0x38/0x60 Apr 02 08:59:02 thinkpad-benjamin kernel: asm_common_interrupt+0x26/0x40 Apr 02 08:59:02 thinkpad-benjamin kernel: RIP: 0010:affine_move_task+0x198/= 0x580 Apr 02 08:59:02 thinkpad-benjamin kernel: Code: 00 49 8b 36 48 8d bb ec 0d = 00 00 e8 22 8a d9 00 45 85 ff 44 8b 04 24 0f 84 21 02 00 00 65 ff 0d 4e 73 = 8b 02 0f 84 6f 03 00 00 <41> 83 e0 04 49 8d 7c 24 08 75 3e e8 18 09 d9 00 b= 8 ff ff ff ff f0 Apr 02 08:59:02 thinkpad-benjamin kernel: RSP: 0018:ffffcc5f4063fcd8 EFLAGS= : 00000246 Apr 02 08:59:02 thinkpad-benjamin kernel: RAX: 0000000000000001 RBX: ffff8a= f641ab2180 RCX: 0000000000000004 Apr 02 08:59:02 thinkpad-benjamin kernel: RDX: 0000000000000000 RSI: 000000= 0000000283 RDI: ffff8af640c08dec Apr 02 08:59:02 thinkpad-benjamin kernel: RBP: ffff8b04a1eb2100 R08: 000000= 0000000000 R09: 0000000000000283 Apr 02 08:59:02 thinkpad-benjamin kernel: R10: 0000000000000002 R11: 000000= 0000000000 R12: ffffcc5f4063fd28 Apr 02 08:59:02 thinkpad-benjamin kernel: R13: ffffcc5f4063fd28 R14: ffffcc= 5f4063fde0 R15: 0000000000000000 Apr 02 08:59:02 thinkpad-benjamin kernel: ? affine_move_task+0x50c/0x580 Apr 02 08:59:02 thinkpad-benjamin kernel: ? srso_alias_return_thunk+0x5/0x= fbef5 Apr 02 08:59:02 thinkpad-benjamin kernel: ? set_next_entity+0xe7/0x270 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_migration_cpu_stop+0x10/= 0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ? affine_move_task+0x3c8/0x580 Apr 02 08:59:02 thinkpad-benjamin kernel: __set_cpus_allowed_ptr+0x66/0xc0 Apr 02 08:59:02 thinkpad-benjamin kernel: set_cpus_allowed_ptr+0x3a/0x60 Apr 02 08:59:02 thinkpad-benjamin kernel: worker_attach_to_pool+0x5f/0xd0 Apr 02 08:59:02 thinkpad-benjamin kernel: rescuer_thread+0x12d/0x5d0 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_rescuer_thread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: kthread+0xe3/0x120 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ret_from_fork+0x2c9/0x360 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ret_from_fork_asm+0x1a/0x30 Apr 02 08:59:02 thinkpad-benjamin kernel: Apr 02 08:59:02 thinkpad-benjamin kernel: INFO: task kworker/u64:31:10258 b= locked for more than 120 seconds. Apr 02 08:59:02 thinkpad-benjamin kernel: Not tainted 7.0.0-rc6-70-rc= 6 #24 Apr 02 08:59:02 thinkpad-benjamin kernel: "echo 0 > /proc/sys/kernel/hung_t= ask_timeout_secs" disables this message. Apr 02 08:59:02 thinkpad-benjamin kernel: task:kworker/u64:31 state:D stac= k:0 pid:10258 tgid:10258 ppid:2 task_flags:0x4208060 flags:0x00080= 000 Apr 02 08:59:02 thinkpad-benjamin kernel: Workqueue: events_unbound idle_cu= ll_fn Apr 02 08:59:02 thinkpad-benjamin kernel: Call Trace: Apr 02 08:59:02 thinkpad-benjamin kernel: Apr 02 08:59:02 thinkpad-benjamin kernel: __schedule+0x47c/0x1000 Apr 02 08:59:02 thinkpad-benjamin kernel: schedule+0x27/0xd0 Apr 02 08:59:02 thinkpad-benjamin kernel: schedule_preempt_disabled+0x15/0= x30 Apr 02 08:59:02 thinkpad-benjamin kernel: __mutex_lock.constprop.0+0x54b/0= xac0 Apr 02 08:59:02 thinkpad-benjamin kernel: ? ttwu_queue_wakelist+0x13c/0x230 Apr 02 08:59:02 thinkpad-benjamin kernel: idle_cull_fn+0x3e/0x170 Apr 02 08:59:02 thinkpad-benjamin kernel: process_one_work+0x19d/0x3a0 Apr 02 08:59:02 thinkpad-benjamin kernel: worker_thread+0x1af/0x320 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_worker_thread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: kthread+0xe3/0x120 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ret_from_fork+0x2c9/0x360 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ret_from_fork_asm+0x1a/0x30 Apr 02 08:59:02 thinkpad-benjamin kernel: Apr 02 08:59:02 thinkpad-benjamin kernel: INFO: task kworker/u64:31:10258 i= s blocked on a mutex likely owned by task kworker/R-kbloc:139. Apr 02 08:59:02 thinkpad-benjamin kernel: task:kworker/R-kbloc state:R run= ning task stack:0 pid:139 tgid:139 ppid:2 task_flags:0x420= 8060 flags:0x00080000 Apr 02 08:59:02 thinkpad-benjamin kernel: Call Trace: Apr 02 08:59:02 thinkpad-benjamin kernel: Apr 02 08:59:02 thinkpad-benjamin kernel: ? __schedule+0x484/0x1000 Apr 02 08:59:02 thinkpad-benjamin kernel: ? preempt_schedule_irq+0x38/0x60 Apr 02 08:59:02 thinkpad-benjamin kernel: ? asm_common_interrupt+0x26/0x40 Apr 02 08:59:02 thinkpad-benjamin kernel: ? affine_move_task+0x198/0x580 Apr 02 08:59:02 thinkpad-benjamin kernel: ? affine_move_task+0x50c/0x580 Apr 02 08:59:02 thinkpad-benjamin kernel: ? srso_alias_return_thunk+0x5/0x= fbef5 Apr 02 08:59:02 thinkpad-benjamin kernel: ? set_next_entity+0xe7/0x270 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_migration_cpu_stop+0x10/= 0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ? affine_move_task+0x3c8/0x580 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __set_cpus_allowed_ptr+0x66/0x= c0 Apr 02 08:59:02 thinkpad-benjamin kernel: ? set_cpus_allowed_ptr+0x3a/0x60 Apr 02 08:59:02 thinkpad-benjamin kernel: ? worker_attach_to_pool+0x5f/0xd0 Apr 02 08:59:02 thinkpad-benjamin kernel: ? rescuer_thread+0x12d/0x5d0 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_rescuer_thread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ? kthread+0xe3/0x120 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ? ret_from_fork+0x2c9/0x360 Apr 02 08:59:02 thinkpad-benjamin kernel: ? __pfx_kthread+0x10/0x10 Apr 02 08:59:02 thinkpad-benjamin kernel: ? ret_from_fork_asm+0x1a/0x30 Apr 02 08:59:02 thinkpad-benjamin kernel: Apr 02 08:59:02 thinkpad-benjamin kernel: Future hung task reports are supp= ressed, see sysctl kernel.hung_task_warnings [=E2=80=A6] Apr 02 09:05:10 thinkpad-benjamin kernel: rcu_tasks_wait_gp: rcu_tasks grac= e period number 9 (since boot) is 2583 jiffies old. Apr 02 09:05:40 thinkpad-benjamin kernel: rcu_tasks_wait_gp: rcu_tasks grac= e period number 9 (since boot) is 10136 jiffies old. [=E2=80=A6] Apr 02 09:07:11 thinkpad-benjamin kernel: rcu_tasks_wait_gp: rcu_tasks grac= e period number 9 (since boot) is 32832 jiffies old. [=E2=80=A6] Apr 02 09:08:09 thinkpad-benjamin kernel: sysrq: Emergency Sync Apr 02 09:08:09 thinkpad-benjamin kernel: Emergency Sync complete Apr 02 09:08:09 thinkpad-benjamin kernel: sysrq: Emergency Remount R/O