linux-kernel - Re: [PATCH v3] tracing: add 'accounted' entry into output of allocation tracepoints

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Message-ID: <CALvZod4XdLTXhcKrV0nRK5PqdMt4+y4qGzfUdZfHUuwWHxU2tA@mail.gmail.com>
Date:   Wed, 18 May 2022 08:09:55 -0700
From:   Shakeel Butt <shakeelb@...gle.com>
To:     Vasily Averin <vvs@...nvz.org>
Cc:     Steven Rostedt <rostedt@...dmis.org>,
        Roman Gushchin <roman.gushchin@...ux.dev>,
        Vlastimil Babka <vbabka@...e.cz>,
        Matthew Wilcox <willy@...radead.org>,
        Hyeonggon Yoo <42.hyeyoo@...il.com>,
        Muchun Song <songmuchun@...edance.com>, kernel@...nvz.org,
        LKML <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux MM <linux-mm@...ck.org>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        David Rientjes <rientjes@...gle.com>,
        Pekka Enberg <penberg@...nel.org>,
        Christoph Lameter <cl@...ux.com>,
        Michal Hocko <mhocko@...e.com>
Subject: Re: [PATCH v3] tracing: add 'accounted' entry into output of
 allocation tracepoints

On Tue, May 17, 2022 at 11:24 PM Vasily Averin <vvs@...nvz.org> wrote:
>
> Slab caches marked with SLAB_ACCOUNT force accounting for every
> allocation from this cache even if __GFP_ACCOUNT flag is not passed.
> Unfortunately, at the moment this flag is not visible in ftrace output,
> and this makes it difficult to analyze the accounted allocations.
>
> This patch adds boolean "allocated" entry into trace output,
> and set it to 'true' for calls used __GFP_ACCOUNT flag and
> for allocations from caches marked with SLAB_ACCOUNT.
>
> Signed-off-by: Vasily Averin <vvs@...nvz.org>

Acked-by: Shakeel Butt <shakeelb@...gle.com>