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7b3ec2b20e
The new deferred attr patch set uncovered a double unlock in the recent port of the defer ops capture and continue code. During log recovery, we're allowed to hold buffers to a transaction that's being used to replay an intent item. When we capture the resources as part of scheduling a continuation of an intent chain, we call xfs_buf_hold to retain our reference to the buffer beyond the transaction commit, but we do /not/ call xfs_trans_bhold to maintain the buffer lock. This means that xfs_defer_ops_continue needs to relock the buffers before xfs_defer_restore_resources joins then tothe new transaction. Additionally, the buffers should not be passed back via the dres structure since they need to remain locked unlike the inodes. So simply set dr_bufs to zero after populating the dres structure. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Allison Henderson <allison.henderson@oracle.com> Reviewed-by: Chandan Babu R <chandan.babu@oracle.com> Signed-off-by: Dave Chinner <david@fromorbit.com> |
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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.