linux-kernel - Re: [PATCH 6.18 000/614] 6.18.2-rc1 review

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Message-ID: <797b868d-ffee-401d-afca-466394a03738@gmx.de>
Date: Wed, 17 Dec 2025 13:45:33 +0100
From: Ronald Warsow <rwarsow@....de>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: stable@...r.kernel.org, patches@...ts.linux.dev,
 linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
 akpm@...ux-foundation.org, linux@...ck-us.net, shuah@...nel.org,
 patches@...nelci.org, lkft-triage@...ts.linaro.org, pavel@...x.de,
 jonathanh@...dia.com, f.fainelli@...il.com, sudipm.mukherjee@...il.com,
 conor@...nel.org, hargar@...rosoft.com, broonie@...nel.org,
 achill@...ill.org, sr@...dewatkins.com
Subject: Re: [PATCH 6.18 000/614] 6.18.2-rc1 review

On 17.12.25 10:36, Greg Kroah-Hartman wrote:
> On Wed, Dec 17, 2025 at 09:27:49AM +0100, Ronald Warsow wrote:
>> On 17.12.25 06:47, Greg Kroah-Hartman wrote:
>>> On Tue, Dec 16, 2025 at 05:06:56PM +0100, Ronald Warsow wrote:
>>>> Hi
...
> 
> Odd, as you aren't even running the driver that this commit points to,
> right?  You shouldn't be building it, so why does this show up as the
> "bad" commit id?
> 
> totally confused,
> 

well I realized I left out several steps to do bisect correct.

I hope this time it's correct:

d84236562448e634208746f0e04f725a509d4648 is the first bad commit
commit d84236562448e634208746f0e04f725a509d4648
Author: Matthew Brost <matthew.brost@...el.com>
Date:   Fri Oct 31 16:40:45 2025 -0700

     drm/xe: Enforce correct user fence signaling order using

     [ Upstream commit adda4e855ab6409a3edaa585293f1f2069ab7299 ]

     Prevent application hangs caused by out-of-order fence signaling when
     user fences are attached. Use drm_syncobj (via dma-fence-chain) to
     guarantee that each user fence signals in order, regardless of the
     signaling order of the attached fences. Ensure user fence writebacks to
     user space occur in the correct sequence.

     v7:
      - Skip drm_syncbj create of error (CI)

     Fixes: dd08ebf6c352 ("drm/xe: Introduce a new DRM driver for Intel 
GPUs")
     Signed-off-by: Matthew Brost <matthew.brost@...el.com>
     Reviewed-by: Thomas Hellström <thomas.hellstrom@...ux.intel.com>
     Link: 
https://patch.msgid.link/20251031234050.3043507-2-matthew.brost@intel.com
     Signed-off-by: Sasha Levin <sashal@...nel.org>

  drivers/gpu/drm/xe/xe_exec_queue.c | 3 +++
  1 file changed, 3 insertions(+)



> greg k-h