linux-ext4 - Re: [PATCH v3 2/2] ext4: Allow to change s_last_trim

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Message-Id: <164135481976.265171.17012583253406040752.b4-ty@mit.edu>
Date:   Tue,  4 Jan 2022 22:53:53 -0500
From:   "Theodore Ts'o" <tytso@....edu>
To:     Lukas Czerner <lczerner@...hat.com>, linux-ext4@...r.kernel.org
Cc:     "Theodore Ts'o" <tytso@....edu>, adilger@...ger.ca,
        Laurent GUERBY <laurent@...rby.net>
Subject: Re: [PATCH v3 2/2] ext4: Allow to change s_last_trim_minblks via sysfs

On Wed, 3 Nov 2021 15:51:22 +0100, Lukas Czerner wrote:
> Ext4 has an optimization mechanism for batched disacrd (FITRIM) that
> should help speed up subsequent calls of FITRIM ioctl by skipping the
> groups that were previously trimmed. However because the FITRIM allows
> to set the minimum size of an extent to trim, ext4 stores the last
> minimum extent size and only avoids trimming the group if it was
> previously trimmed with minimum extent size equal to, or smaller than
> the current call.
> 
> [...]

Applied, thanks!

[2/2] ext4: Allow to change s_last_trim_minblks via sysfs
      commit: db19c4cdc28a8ec1241d50656991ab1bd96f5c02

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