linux-kernel - Re: [PATCH v4 0/2] mm: slub: Enhanced debugging in slub error

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Message-ID: <c1db529b-f16c-4195-8832-8f2cecd84ece@suse.cz>
Date: Thu, 27 Feb 2025 17:12:38 +0100
From: Vlastimil Babka <vbabka@...e.cz>
To: Hyesoo Yu <hyesoo.yu@...sung.com>
Cc: janghyuck.kim@...sung.com, harry.yoo@...cle.com,
 Christoph Lameter <cl@...ux.com>, Pekka Enberg <penberg@...nel.org>,
 David Rientjes <rientjes@...gle.com>, Joonsoo Kim <iamjoonsoo.kim@....com>,
 Andrew Morton <akpm@...ux-foundation.org>,
 Roman Gushchin <roman.gushchin@...ux.dev>,
 Hyeonggon Yoo <42.hyeyoo@...il.com>, linux-mm@...ck.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 0/2] mm: slub: Enhanced debugging in slub error

On 2/26/25 09:11, Hyesoo Yu wrote:
> Dear Maintainer,
> 
> The purpose is to improve the debugging capabilities of the slub allocator
> when a error occurs. The following improvements have been made:
> 
>  - Added WARN() calls at specific locations (slab_err, object_err) to detect
> errors effectively and to generate a crash dump if panic_on_warn is enabled.
> 
>  - Additionally, the error printing location in check_object has been adjusted to
> display the broken data before the restoration process. This improvement
> allows for a better understanding of how the data was corrupted.
> 
> This series combines two patches that were discussed seperately in the links below.
> https://lore.kernel.org/linux-mm/20250120082908.4162780-1-hyesoo.yu@samsung.com/
> https://lore.kernel.org/linux-mm/20250120083023.4162932-1-hyesoo.yu@samsung.com/
> 
> Thanks you.

Thanks. On top of things already mentioned, I added some kunit suppressions
in patch 2. Please check the result:

https://web.git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab.git/log/?h=slab/for-6.15/fixes-cleanups