Commit 4a338542 authored Aug 29, 2011 by Josef Bacik

Btrfs: set truncate block rsv's size

While debugging a different issue I noticed that we were always reserving space
when we tried to use our truncate block rsv's. This is because they didn't have
a ->size value, so use_block_rsv just assumes there is nothing reserved and it
does a reserve_metadata_bytes. This is because btrfs_check_block_rsv() doesn't
actually add to the size of the block rsv. That seems to be the right thing to
do so set ->size to the minimum truncate size we need, since we will always only
refill to that size anyway, and this way everything works out correctly.

Signed-off-by: Josef Bacik <josef@redhat.com>

parent 7f701508

fs/btrfs/inode.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -3561,6 +3561,7 @@ void btrfs_evict_inode(struct inode *inode)
		btrfs_orphan_del(NULL, inode);
		goto no_delete;
		}
		rsv->size = min_size;

		btrfs_i_size_write(inode, 0);

		@@ -6530,6 +6531,7 @@ static int btrfs_truncate(struct inode *inode)
		rsv = btrfs_alloc_block_rsv(root);
		if (!rsv)
		return -ENOMEM;
		rsv->size = min_size;

		/*
		* 1 for the truncate slack space