xfs: prevent recursion in xfs_buf_iorequest

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If the b_iodone handler is run in calling context in xfs_buf_iorequest we
can run into a recursion where xfs_buf_iodone_callbacks keeps calling back
into xfs_buf_iorequest because an I/O error happened, which keeps calling
back into xfs_buf_iorequest.  This chain will usually not take long
because the filesystem gets shut down because of log I/O errors, but even
over a short time it can cause stack overflows if run on the same context.

As a short term workaround make sure we always call the iodone handler in
workqueue context.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

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Christoph Hellwig 2012-07-02 06:00:04 -04:00 • committed by Ben Myers

parent eb71a12e41

commit 08023d6dbe

1 changed files with 1 additions and 1 deletions

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fs/xfs/xfs_buf.c

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