AuxXxilium/linux_dsm_epyc7002
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xfs: switch to NOFS allocation under i_lock in xfs_getbmap

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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: Christoph Hellwig <hch@lst.de>
Reviewed-by: Felix Blyakher <felixb@sgi.com>
Signed-off-by: Felix Blyakher <felixb@sgi.com>
This commit is contained in:
Christoph Hellwig 2009-07-18 18:14:54 -04:00 committed by Felix Blyakher
parent 0cc6eee130
commit ca35dcd6ca
1 changed files with 1 additions and 1 deletions
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2
fs/xfs/xfs_bmap.c
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@ -6009,7 +6009,7 @@ xfs_getbmap(
*/ */
error = ENOMEM; error = ENOMEM;
subnex = 16; subnex = 16;
map = kmem_alloc(subnex * sizeof(*map), KM_MAYFAIL); map = kmem_alloc(subnex * sizeof(*map), KM_MAYFAIL | KM_NOFS);
if (!map) if (!map)
goto out_unlock_ilock; goto out_unlock_ilock;