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Commit ca35dcd6 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Felix Blyakher
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xfs: switch to NOFS allocation under i_lock in xfs_getbmap 



xfs_getbmap allocates memory with i_lock held, but i_lock is taken in
reclaim context so all allocations under it must avoid recursions into
the filesystem.

Reported by the new reclaim context tracing in lockdep.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarFelix Blyakher <felixb@sgi.com>
Signed-off-by: default avatarFelix Blyakher <felixb@sgi.com>
parent 0cc6eee1

fs/xfs/xfs_bmap.c

+1 −1
Original line number Diff line number Diff line
@@ -6009,7 +6009,7 @@ xfs_getbmap( 
	 */

	error = ENOMEM;

	subnex = 16;

	map = kmem_alloc(subnex * sizeof(*map), KM_MAYFAIL);

	map = kmem_alloc(subnex * sizeof(*map), KM_MAYFAIL | KM_NOFS);

	if (!map)

		goto out_unlock_ilock;