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xfs: ignore extent size hints for always COW inodes

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There is no point in applying extent size hints for always COW inodes,
as we would just have to COW any extra allocation beyond the data
actually written.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Christoph Hellwig 2019-10-14 10:07:21 -07:00 committed by Darrick J. Wong
parent e5e634041b
commit bdb2ed2dbd
1 changed files with 6 additions and 0 deletions
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6
fs/xfs/xfs_inode.c
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@ -55,6 +55,12 @@ xfs_extlen_t
xfs_get_extsz_hint(
struct xfs_inode *ip)
{
/*
* No point in aligning allocations if we need to COW to actually
* write to them.
*/
if (xfs_is_always_cow_inode(ip))
return 0;
if ((ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE) && ip->i_d.di_extsize)
return ip->i_d.di_extsize;
if (XFS_IS_REALTIME_INODE(ip))