linux-kernel - Re: [PATCH 2/2] alloc_tag: skip pgalloc_tag

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Message-Id: <20241226150127.73d1b2a08cf31dac1a900c1e@linux-foundation.org>
Date: Thu, 26 Dec 2024 15:01:27 -0800
From: Andrew Morton <akpm@...ux-foundation.org>
To: Suren Baghdasaryan <surenb@...gle.com>
Cc: kent.overstreet@...ux.dev, yuzhao@...gle.com, 00107082@....com,
 quic_zhenhuah@...cinc.com, linux-mm@...ck.org,
 linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH 2/2] alloc_tag: skip pgalloc_tag_swap if profiling is
 disabled

On Thu, 26 Dec 2024 13:16:39 -0800 Suren Baghdasaryan <surenb@...gle.com> wrote:

> When memory allocation profiling is disabled, there is no need to swap
> allocation tags during migration. Skip it to avoid unnecessary overhead.
> 
> Fixes: e0a955bf7f61 ("mm/codetag: add pgalloc_tag_copy()")
> Signed-off-by: Suren Baghdasaryan <surenb@...gle.com>
> Cc: stable@...r.kernel.org

Are these changes worth backporting?  Some indication of how much
difference the patches make would help people understand why we're
proposing a backport.