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b7fdfd29a1
[BUG] With v6.17-rc kernels, btrfs will always set 'ssd' mount option even if the block device is not a rotating one: # cat /sys/block/sdd/queue/rotational 1 # cat /etc/fstab: LABEL=DATA2 /data2 btrfs rw,relatime,space_cache=v2,subvolid=5,subvol=/,nofail,nosuid,nodev 0 0 # mount [...] /dev/sdd on /data2 type btrfs (rw,nosuid,nodev,relatime,ssd,space_cache=v2,subvolid=5,subvol=/) [CAUSE] The 'ssd' mount option is set by set_device_specific_options(), and it expects that if there is any rotating device in the btrfs, it will set fs_devices::rotating. However after commitbddf57a707("btrfs: delay btrfs_open_devices() until super block is created"), the device opening is delayed until the super block is created. But the timing of set_device_specific_options() is still left as is, this makes the function be called without any device opened. Since no device is opened, thus fs_devices::rotating will never be set, making btrfs incorrectly set 'ssd' mount option. [FIX] Only call set_device_specific_options() after btrfs_open_devices(). Also only call set_device_specific_options() after a new mount, if we're mounting a mounted btrfs, there is no need to set the device specific mount options again. Reported-by: HAN Yuwei <hrx@bupt.moe> Link: https://lore.kernel.org/linux-btrfs/C8FF75669DFFC3C5+5f93bf8a-80a0-48a6-81bf-4ec890abc99a@bupt.moe/ Fixes:bddf57a707("btrfs: delay btrfs_open_devices() until super block is created") CC: stable@vger.kernel.org # 6.17 Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.