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Message-ID: <7e3fdac4-e0bc-42f4-9bb3-a6b16f323491@leemhuis.info>
Date: Wed, 8 May 2024 14:51:10 +0200
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Subject: Re: [Regression] 6.9.0: WARNING: workqueue: WQ_MEM_RECLAIM
 ttm:ttm_bo_delayed_delete [ttm] is flushing !WQ_MEM_RECLAIM
 events:qxl_gc_work [qxl]
To: stable@vger.kernel.org, Greg KH <gregkh@linuxfoundation.org>
Cc: airlied@gmail.com, airlied@redhat.com, daniel@ffwll.ch,
 dreaming.about.electric.sheep@gmail.com, dri-devel@lists.freedesktop.org,
 kraxel@redhat.com, linux-kernel@vger.kernel.org,
 maarten.lankhorst@linux.intel.com, mripard@kernel.org,
 spice-devel@lists.freedesktop.org, tzimmermann@suse.de,
 virtualization@lists.linux.dev, Anders Blomdell <anders.blomdell@gmail.com>,
 Linux regressions mailing list <regressions@lists.linux.dev>,
 David Wang <00107082@163.com>
References: <20240430061337.764633-1-00107082@163.com>
 <20240506143003.4855-1-00107082@163.com>
 <ac41c761-27c9-48c3-bd80-d94d4db291e8@leemhuis.info>
 <b57f8ede-5de6-4d3d-96a0-d2fdc6c31174@gmail.com>
From: "Linux regression tracking (Thorsten Leemhuis)"
 <regressions@leemhuis.info>
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On 08.05.24 14:35, Anders Blomdell wrote:
> On 2024-05-07 07:04, Linux regression tracking (Thorsten Leemhuis) wrote:
>> On 06.05.24 16:30, David Wang wrote:
>>>> On 30.04.24 08:13, David Wang wrote:
>>
>>>> And confirmed that the warning is caused by
>>>> 07ed11afb68d94eadd4ffc082b97c2331307c5ea and reverting it can fix.
>>>
>>> The kernel warning still shows up in 6.9.0-rc7.
>>> (I think 4 high load processes on a 2-Core VM could easily trigger
>>> the kernel warning.)
>>
>> Thx for the report. Linus just reverted the commit 07ed11afb68 you
>> mentioned in your initial mail (I put that quote in again, see above):
>>
>> 3628e0383dd349 ("Reapply "drm/qxl: simplify qxl_fence_wait"")
>> https://git.kernel.org/torvalds/c/3628e0383dd349f02f882e612ab6184e4bb3dc10
>>
>> So this hopefully should be history now.
>>
> Since this affects the 6.8 series (6.8.7 and onwards), I made a CC to
> stable@vger.kernel.org

Ohh, good idea, I thought Linus had added a stable tag, but that is not
the case. Adding Greg as well and making things explicit:

@Greg: you might want to add 3628e0383dd349 ("Reapply "drm/qxl: simplify
qxl_fence_wait"") to all branches that received 07ed11afb68d94 ("Revert
"drm/qxl: simplify qxl_fence_wait"") (which afaics went into v6.8.7,
v6.6.28, v6.1.87, and v5.15.156).

Ciao, Thorsten