xfs: fallback to vmalloc for large buffers in xfs_getbmap

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xfs_getbmap uses for a large buffer for extents, which is kmalloc'd.
This can fail after the system has been running for some time as it
is a high order allocation. Add a fallback to vmalloc so that it
doesn't require contiguous memory and so won't randomly fail on
files with large extent lists.

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

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Dave Chinner 2012-03-07 04:50:22 +00:00 • committed by Ben Myers

parent ad650f5b27

commit f074211f60

1 changed files with 10 additions and 3 deletions

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fs/xfs/xfs_bmap.c

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