linux-kernel - Maybe we can set default zstd compression level to 1 when SSD detected?

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Message-ID: <8c2e5d04-dbda-4b12-992e-34f0e70c7218@archlinuxcn.org>
Date: Sun, 13 Apr 2025 12:07:26 +0800
From: Integral <integral@...hlinuxcn.org>
To: Chris Mason <clm@...com>, Josef Bacik <josef@...icpanda.com>,
 David Sterba <dsterba@...e.com>
Cc: linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Maybe we can set default zstd compression level to 1 when SSD
 detected?

Hi,

When SSD is detected, maybe we can set default zstd compression level to 1.

Current default compression level for zstd is 3, which is not optimal 
for SSDs.

This GitHub Gist [1] can serve as a reference.

An example is Fedora Workstation [2], which uses `zstd:1` as default

compression option.

[1] Link: 
https://gist.github.com/braindevices/fde49c6a8f6b9aaf563fb977562aafec

[2] Link: https://fedoraproject.org/wiki/Changes/BtrfsTransparentCompression

Sincerely,

Integral