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authorLachlan McIlroy <lachlan@sgi.com>2008-06-27 13:33:11 +1000
committerNiv Sardi <xaiki@debian.org>2008-07-28 16:59:13 +1000
commit313b5c767a044c7a0db5e773cb7aea70383b2627 (patch)
tree5752234a32bbfacd7b0dd01365986af76396c18b /fs
parentb877e3d37dda0154868a3c78f02f38a1ec14ce79 (diff)
[XFS] Allow xfs_bmbt_split() to fallback to the lowspace allocator
algorithm If xfs_bmbt_split() cannot find an AG with sufficient free space to satisfy a full extent btree split then fall back to the lowspace allocator algorithm. SGI-PV: 983338 SGI-Modid: xfs-linux-melb:xfs-kern:31359a Signed-off-by: Lachlan McIlroy <lachlan@sgi.com> Signed-off-by: David Chinner <dgc@sgi.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/xfs/xfs_bmap_btree.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/fs/xfs/xfs_bmap_btree.c b/fs/xfs/xfs_bmap_btree.c
index 1140cef4ba9..23efad29a5c 100644
--- a/fs/xfs/xfs_bmap_btree.c
+++ b/fs/xfs/xfs_bmap_btree.c
@@ -1525,6 +1525,21 @@ xfs_bmbt_split(
XFS_BMBT_TRACE_CURSOR(cur, ERROR);
return error;
}
+ if (args.fsbno == NULLFSBLOCK && args.minleft) {
+ /*
+ * Could not find an AG with enough free space to satisfy
+ * a full btree split. Try again without minleft and if
+ * successful activate the lowspace algorithm.
+ */
+ args.fsbno = 0;
+ args.type = XFS_ALLOCTYPE_FIRST_AG;
+ args.minleft = 0;
+ if ((error = xfs_alloc_vextent(&args))) {
+ XFS_BMBT_TRACE_CURSOR(cur, ERROR);
+ return error;
+ }
+ cur->bc_private.b.flist->xbf_low = 1;
+ }
if (args.fsbno == NULLFSBLOCK) {
XFS_BMBT_TRACE_CURSOR(cur, EXIT);
*stat = 0;