From 16eaab839a9273ed156ebfccbd40c15d1e72f3d8 Mon Sep 17 00:00:00 2001 From: Brian Foster Date: Wed, 28 Apr 2021 15:05:50 -0700 Subject: xfs: introduce in-core global counter of allocbt blocks Introduce an in-core counter to track the sum of all allocbt blocks used by the filesystem. This value is currently tracked per-ag via the ->agf_btreeblks field in the AGF, which also happens to include rmapbt blocks. A global, in-core count of allocbt blocks is required to identify the subset of global ->m_fdblocks that consists of unavailable blocks currently used for allocation btrees. To support this calculation at block reservation time, construct a similar global counter for allocbt blocks, populate it on first read of each AGF and update it as allocbt blocks are used and released. Signed-off-by: Brian Foster Reviewed-by: Chandan Babu R Reviewed-by: Allison Henderson Reviewed-by: Darrick J. Wong Signed-off-by: Darrick J. Wong --- fs/xfs/libxfs/xfs_alloc_btree.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'fs/xfs/libxfs/xfs_alloc_btree.c') diff --git a/fs/xfs/libxfs/xfs_alloc_btree.c b/fs/xfs/libxfs/xfs_alloc_btree.c index dbe302d1cb8d..a43e4c50e69b 100644 --- a/fs/xfs/libxfs/xfs_alloc_btree.c +++ b/fs/xfs/libxfs/xfs_alloc_btree.c @@ -71,6 +71,7 @@ xfs_allocbt_alloc_block( return 0; } + atomic64_inc(&cur->bc_mp->m_allocbt_blks); xfs_extent_busy_reuse(cur->bc_mp, cur->bc_ag.agno, bno, 1, false); new->s = cpu_to_be32(bno); @@ -94,6 +95,7 @@ xfs_allocbt_free_block( if (error) return error; + atomic64_dec(&cur->bc_mp->m_allocbt_blks); xfs_extent_busy_insert(cur->bc_tp, be32_to_cpu(agf->agf_seqno), bno, 1, XFS_EXTENT_BUSY_SKIP_DISCARD); return 0; -- cgit v1.2.3