linux-ext4 - Re: [PATCH 1/5] ext4: Make mballoc try target group first even with mb_optimize

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Message-Id: <166381513758.2957616.15274082762134894004.b4-ty@mit.edu>
Date:   Wed, 21 Sep 2022 22:52:34 -0400
From:   "Theodore Ts'o" <tytso@....edu>
To:     jack@...e.cz
Cc:     "Theodore Ts'o" <tytso@....edu>, harshadshirwadkar@...il.com,
        stable@...r.kernel.org, ritesh.list@...il.com,
        stefan.wahren@...e.com, ojaswin@...ux.ibm.com,
        linux-ext4@...r.kernel.org, regressions@...mhuis.info
Subject: Re: [PATCH 1/5] ext4: Make mballoc try target group first even with mb_optimize_scan

On Thu, 8 Sep 2022 11:21:24 +0200, Jan Kara wrote:
> One of the side-effects of mb_optimize_scan was that the optimized
> functions to select next group to try were called even before we tried
> the goal group. As a result we no longer allocate files close to
> corresponding inodes as well as we don't try to expand currently
> allocated extent in the same group. This results in reaim regression
> with workfile.disk workload of upto 8% with many clients on my test
> machine:
> 
> [...]

Applied, thanks!

[1/5] ext4: Make mballoc try target group first even with mb_optimize_scan
      commit: 4fca50d440cc5d4dc570ad5484cc0b70b381bc2a
[2/5] ext4: Avoid unnecessary spreading of allocations among groups
      commit: 1940265ede6683f6317cba0d428ce6505eaca944
[3/5] ext4: Make directory inode spreading reflect flexbg size
      commit: 613c5a85898d1cd44e68f28d65eccf64a8ace9cf
[4/5] ext4: Use locality group preallocation for small closed files
      commit: a9f2a2931d0e197ab28c6007966053fdababd53f
[5/5] ext4: Use buckets for cr 1 block scan instead of rbtree
      commit: 83e80a6e3543f37f74c8e48a5f305b054b65ce2a

Best regards,
-- 
Theodore Ts'o <tytso@....edu>