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b6903358c2
If we are processing callbacks on an iclog, nothing can be concurrently adding callbacks to the loop. We only add callbacks to the iclog when they are in ACTIVE or WANT_SYNC state, and we explicitly do not add callbacks if the iclog is already in IOERROR state. The only way to have a dequeue racing with an enqueue is to be processing a shutdown without a direct reference to an iclog in ACTIVE or WANT_SYNC state. As the enqueue avoids this race condition, we only ever need a single dequeue operation in xlog_state_do_iclog_callbacks(). Hence we can remove the loop. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Darrick J. Wong <djwong@kernel.org> |
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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.