From 313b5c767a044c7a0db5e773cb7aea70383b2627 Mon Sep 17 00:00:00 2001 From: Lachlan McIlroy Date: Fri, 27 Jun 2008 13:33:11 +1000 Subject: [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 Signed-off-by: David Chinner --- fs/xfs/xfs_bmap_btree.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'fs/xfs') diff --git a/fs/xfs/xfs_bmap_btree.c b/fs/xfs/xfs_bmap_btree.c index 1140cef4ba99..23efad29a5cd 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; -- cgit v1.2.2