linux-kernel - Re: [PATCH] mm/slub: use stackdepot to save stack trace in objects

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Message-ID: <3558629b-2ae3-7c8a-f121-c3413aa8fb30@google.com>
Date:   Sun, 25 Apr 2021 18:10:07 -0700 (PDT)
From:   David Rientjes <rientjes@...gle.com>
To:     Oliver Glitta <glittao@...il.com>
cc:     cl@...ux.com, penberg@...nel.org, iamjoonsoo.kim@....com,
        akpm@...ux-foundation.org, vbabka@...e.cz,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH] mm/slub: use stackdepot to save stack trace in objects

On Wed, 14 Apr 2021, glittao@...il.com wrote:

> From: Oliver Glitta <glittao@...il.com>
> 
> Many stack traces are similar so there are many similar arrays.
> Stackdepot saves each unique stack only once.
> 
> Replace field addrs in struct track with depot_stack_handle_t handle.
> Use stackdepot to save stack trace.
> 
> The benefits are smaller memory overhead and possibility to aggregate
> per-cache statistics in the future using the stackdepot handle
> instead of matching stacks manually.
> 
> Signed-off-by: Oliver Glitta <glittao@...il.com>

Acked-by: David Rientjes <rientjes@...gle.com>