23fd4f4dc6
bcachefs detects journal stuck conditions in a couple different places. If the logic in the journal reservation slow path happens to detect the problem, I've seen instances where the filesystem remains deadlocked even though it has been shut down. This is occasionally reproduced by generic/333, and usually manifests as one or more tasks stuck in the journal reservation slow path. To help avoid this problem, repeat the journal error check in __journal_res_get() once under spinlock to cover the case where the previous lock holder might have triggered shutdown. This also helps avoid spurious/duplicate stuck reports. Also, wake the journal from the halt code to make sure blocked callers of the journal res slowpath have a chance to wake up and observe the pending error. This survives an overnight looping run of generic/333 without the aforementioned lockups. Signed-off-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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 Restructured Text 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.