linux-kernel - Re: [PATCH] mm: slub: add panic_on

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Message-Id: <21CF143C-B9D1-4D3F-A875-370924265593@lca.pw>
Date:   Fri, 1 May 2020 17:29:19 -0400
From:   Qian Cai <cai@....pw>
To:     Rafael Aquini <aquini@...hat.com>
Cc:     Linux-MM <linux-mm@...ck.org>, linux-kernel@...r.kernel.org,
        akpm@...ux-foundation.org, iamjoonsoo.kim@....com,
        rientjes@...gle.com, penberg@...nel.org, cl@...ux.com
Subject: Re: [PATCH] mm: slub: add panic_on_error to the debug facilities



> On May 1, 2020, at 5:15 PM, Rafael Aquini <aquini@...hat.com> wrote:
> 
> Sometimes it is desirable to override SLUB's debug facilities
> default behavior upon stumbling on a cache or object error
> and just stop the execution in order to grab a coredump, at
> the error-spotting time, instead of trying to fix the issue
> and report in an attempt to keep the system rolling.
> 
> This patch introduces a new debug flag SLAB_PANIC_ON_ERROR,
> along with its related SLUB-machinery, in order to extend
> current slub_debug facilites and provide the aforementioned
> behavior override.

Instead of adding those things everywhere. How about adding something like panic_on_taint? Then, you could write specific taint flags you are interested in to that file because slab_bug() will taint it TAINT_BAD_PAGE.