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6b789c337a
Prior to commitdf732b29c8("xfs: call xlog_state_release_iclog with l_icloglock held"), xlog_state_release_iclog() always performed a locked check of the iclog error state before proceeding into the sync state processing code. As of this commit, part of xlog_state_release_iclog() was open-coded into xfs_log_release_iclog() and as a result the locked error state check was lost. The lockless check still exists, but this doesn't account for the possibility of a race with a shutdown being performed by another task causing the iclog state to change while the original task waits on ->l_icloglock. This has reproduced very rarely via generic/475 and manifests as an assert failure in __xlog_state_release_iclog() due to an unexpected iclog state. Restore the locked error state check in xlog_state_release_iclog() to ensure that an iclog state update via shutdown doesn't race with the iclog release state processing code. Fixes:df732b29c8("xfs: call xlog_state_release_iclog with l_icloglock held") Reported-by: Zorro Lang <zlang@redhat.com> Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.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 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.