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GFS2: Fall back to ignoring reservations, if there are no other blocks left

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When we get to the stage of allocating blocks, we know that the
resource group in question must contain enough free blocks, otherwise
gfs2_inplace_reserve() would have failed. So if we are left with only
free blocks which are reserved, then we must use those. This can happen
if another node has sneeked in and use some blocks reserved on this
node, for example. Generally this will happen very rarely and only
when the resouce group is nearly full.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Steven Whitehouse 2012-08-23 13:43:40 +01:00
parent 2b9731e8bb
commit 137834a696
1 changed files with 5 additions and 0 deletions
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5
fs/gfs2/rgrp.c
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@ -2012,6 +2012,11 @@ int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *nblocks,
gfs2_rbm_from_block(&rbm, goal); gfs2_rbm_from_block(&rbm, goal);
error = gfs2_rbm_find(&rbm, GFS2_BLKST_FREE, ip, false); error = gfs2_rbm_find(&rbm, GFS2_BLKST_FREE, ip, false);
if (error == -ENOSPC) {
gfs2_rbm_from_block(&rbm, goal);
error = gfs2_rbm_find(&rbm, GFS2_BLKST_FREE, NULL, false);
}
/* Since all blocks are reserved in advance, this shouldn't happen */ /* Since all blocks are reserved in advance, this shouldn't happen */
if (error) { if (error) {
fs_warn(sdp, "error=%d, nblocks=%u, full=%d\n", error, *nblocks, fs_warn(sdp, "error=%d, nblocks=%u, full=%d\n", error, *nblocks,