From: Mark Brown <broonie@kernel.org>
To: Chengming Zhou <chengming.zhou@linux.dev>
Cc: vbabka@suse.cz, cl@linux.com, penberg@kernel.org,
rientjes@google.com, iamjoonsoo.kim@lge.com,
akpm@linux-foundation.org, roman.gushchin@linux.dev,
42.hyeyoo@gmail.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org,
Chengming Zhou <zhouchengming@bytedance.com>
Subject: Re: [PATCH v5 6/9] slub: Delay freezing of partial slabs
Date: Tue, 21 Nov 2023 18:21:39 +0000 [thread overview]
Message-ID: <ZVz1M9AYRepPRBxm@finisterre.sirena.org.uk> (raw)
In-Reply-To: <b3bc868f-bf83-4b86-bcf0-13e99d0b7c7e@linux.dev>
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On Tue, Nov 21, 2023 at 11:47:26PM +0800, Chengming Zhou wrote:
> Ah yes, there is no NMI on ARM, so CPU 3 maybe running somewhere with
> interrupts disabled. I searched the full log, but still haven't a clue.
> And there is no any WARNING or BUG related to SLUB in the log.
Yeah, nor anything else particularly. I tried turning on some debug
options:
CONFIG_SOFTLOCKUP_DETECTOR=y
CONFIG_DETECT_HUNG_TASK=y
CONFIG_WQ_WATCHDOG=y
CONFIG_DEBUG_PREEMPT=y
CONFIG_DEBUG_LOCKING=y
CONFIG_DEBUG_ATOMIC_SLEEP=y
https://validation.linaro.org/scheduler/job/4017828
which has some additional warnings related to clock changes but AFAICT
those come from today's -next rather than the debug stuff:
https://validation.linaro.org/scheduler/job/4017823
so that's not super helpful.
> I wonder how to reproduce it locally with a Qemu VM since I don't have
> the ARM machine.
There's sample qemu jobs available from for example KernelCI:
https://storage.kernelci.org/next/master/next-20231120/arm/multi_v7_defconfig/gcc-10/lab-baylibre/baseline-qemu_arm-virt-gicv3.html
(includes the command line, though it's not using Debian testing like my
test was). Note that I'm testing a bunch of platforms with the same
kernel/rootfs combination and it was only the Raspberry Pi 3 which blew
up. It is a bit tight for memory which might have some influence?
I'm really suspecting this may have made some underlying platform bug
more obvious :/
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next prev parent reply other threads:[~2023-11-21 18:21 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-02 3:23 [PATCH v5 0/9] slub: Delay freezing of CPU " chengming.zhou
2023-11-02 3:23 ` [PATCH v5 1/9] slub: Reflow ___slab_alloc() chengming.zhou
2023-11-22 0:26 ` Hyeonggon Yoo
2023-11-02 3:23 ` [PATCH v5 2/9] slub: Change get_partial() interfaces to return slab chengming.zhou
2023-11-22 1:09 ` Hyeonggon Yoo
2023-11-02 3:23 ` [PATCH v5 3/9] slub: Keep track of whether slub is on the per-node partial list chengming.zhou
2023-11-22 1:21 ` Hyeonggon Yoo
2023-11-02 3:23 ` [PATCH v5 4/9] slub: Prepare __slab_free() for unfrozen partial slab out of node " chengming.zhou
2023-12-03 6:01 ` Hyeonggon Yoo
2023-11-02 3:23 ` [PATCH v5 5/9] slub: Introduce freeze_slab() chengming.zhou
2023-11-02 3:23 ` [PATCH v5 6/9] slub: Delay freezing of partial slabs chengming.zhou
2023-11-14 5:44 ` kernel test robot
2023-11-20 18:49 ` Mark Brown
2023-11-21 0:58 ` Chengming Zhou
2023-11-21 1:29 ` Mark Brown
2023-11-21 15:47 ` Chengming Zhou
2023-11-21 18:21 ` Mark Brown [this message]
2023-11-22 8:52 ` Vlastimil Babka
2023-11-22 9:37 ` Vlastimil Babka
2023-11-22 11:27 ` Mark Brown
2023-11-22 11:35 ` Chengming Zhou
2023-11-22 11:40 ` Vlastimil Babka
2023-11-22 11:54 ` Chengming Zhou
2023-11-22 13:19 ` Vlastimil Babka
2023-11-22 14:28 ` Chengming Zhou
2023-11-22 14:32 ` Vlastimil Babka
2023-12-03 6:53 ` Hyeonggon Yoo
2023-12-03 10:15 ` Chengming Zhou
2023-12-04 16:58 ` Vlastimil Babka
2023-11-02 3:23 ` [PATCH v5 7/9] slub: Optimize deactivate_slab() chengming.zhou
2023-12-03 9:23 ` Hyeonggon Yoo
2023-12-03 10:26 ` Chengming Zhou
2023-12-03 11:19 ` Hyeonggon Yoo
2023-12-03 11:47 ` Chengming Zhou
2023-12-04 17:55 ` Vlastimil Babka
2023-12-05 0:20 ` Hyeonggon Yoo
2023-11-02 3:23 ` [PATCH v5 8/9] slub: Rename all *unfreeze_partials* functions to *put_partials* chengming.zhou
2023-12-03 9:27 ` Hyeonggon Yoo
2023-11-02 3:23 ` [PATCH v5 9/9] slub: Update frozen slabs documentations in the source chengming.zhou
2023-12-03 9:47 ` Hyeonggon Yoo
2023-12-04 21:41 ` Christoph Lameter (Ampere)
2023-12-05 6:06 ` Chengming Zhou
2023-12-05 9:39 ` Vlastimil Babka
2023-11-13 8:36 ` [PATCH v5 0/9] slub: Delay freezing of CPU partial slabs Vlastimil Babka
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