linux-kernel - Re: [PATCH] xfs: Reduce unnecessary searches when searching for the best extents

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Message-Id: <173053338963.1934091.14116776076321174850.b4-ty@kernel.org>
Date: Sat, 02 Nov 2024 08:43:09 +0100
From: Carlos Maiolino <cem@...nel.org>
To: djwong@...nel.org, Chi Zhiling <chizhiling@....com>
Cc: linux-xfs@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Chi Zhiling <chizhiling@...inos.cn>
Subject: Re: [PATCH] xfs: Reduce unnecessary searches when searching for
 the best extents

On Fri, 25 Oct 2024 10:33:20 +0800, Chi Zhiling wrote:
> Recently, we found that the CPU spent a lot of time in
> xfs_alloc_ag_vextent_size when the filesystem has millions of fragmented
> spaces.
> 
> The reason is that we conducted much extra searching for extents that
> could not yield a better result, and these searches would cost a lot of
> time when there were millions of extents to search through. Even if we
> get the same result length, we don't switch our choice to the new one,
> so we can definitely terminate the search early.
> 
> [...]

Applied to for-next, thanks!

[1/1] xfs: Reduce unnecessary searches when searching for the best extents
      commit: 3ef22684038aa577c10972ee9c6a2455f5fac941

Best regards,
-- 
Carlos Maiolino <cem@...nel.org>