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| author |   Brian Foster <bfoster@redhat.com> | 2021-04-28 15:05:50 -0700 |
|---|---|---|
| committer |   Darrick J. Wong <djwong@kernel.org> | 2021-04-29 07:45:44 -0700 |
| commit | 16eaab839a9273ed156ebfccbd40c15d1e72f3d8 (patch) | |
| tree | a51e8e7c3879583518cdfdcd54af31503829abe7 /fs/xfs/libxfs/xfs_alloc_btree.c | |
| parent | xfs: unconditionally read all AGFs on mounts with perag reservation (diff) | |
| download | linux-dev-16eaab839a9273ed156ebfccbd40c15d1e72f3d8.tar.xz linux-dev-16eaab839a9273ed156ebfccbd40c15d1e72f3d8.zip | |
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 <bfoster@redhat.com>
Reviewed-by: Chandan Babu R <chandanrlinux@gmail.com>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Diffstat (limited to 'fs/xfs/libxfs/xfs_alloc_btree.c')
| -rw-r--r-- | fs/xfs/libxfs/xfs_alloc_btree.c | 2 |
1 files changed, 2 insertions, 0 deletions
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; |