linux-kernel - Re: [RFC 03/26] mm, slub: don't disable irq for debug_check_no_locks

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Message-ID: <20210525102430.GL30378@techsingularity.net>
Date:   Tue, 25 May 2021 11:24:30 +0100
From:   Mel Gorman <mgorman@...hsingularity.net>
To:     Vlastimil Babka <vbabka@...e.cz>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Christoph Lameter <cl@...ux.com>,
        David Rientjes <rientjes@...gle.com>,
        Pekka Enberg <penberg@...nel.org>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Jann Horn <jannh@...gle.com>
Subject: Re: [RFC 03/26] mm, slub: don't disable irq for
 debug_check_no_locks_freed()

On Tue, May 25, 2021 at 01:39:23AM +0200, Vlastimil Babka wrote:
> In slab_free_hook() we disable irqs around the debug_check_no_locks_freed()
> call, which is unnecessary, as irqs are already being disabled inside the call.
> This seems to be leftover from the past where there were more calls inside the
> irq disabled sections. Remove the irq disable/enable operations.
> 
> Signed-off-by: Vlastimil Babka <vbabka@...e.cz>

Looks like it was needed for kmemcheck which went away back in 4.15 so

Acked-by: Mel Gorman <mgorman@...hsingularity.net>

-- 
Mel Gorman
SUSE Labs