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| author | Brian Foster <bfoster@redhat.com> | 2021-04-29 00:05:50 +0200 |
|---|---|---|
| committer | Darrick J. Wong <djwong@kernel.org> | 2021-04-29 16:45:44 +0200 |
| commit | 16eaab839a9273ed156ebfccbd40c15d1e72f3d8 (patch) | |
| tree | a51e8e7c3879583518cdfdcd54af31503829abe7 /fs/xfs/xfs_mount.h | |
| parent | xfs: unconditionally read all AGFs on mounts with perag reservation (diff) | |
| download | linux-16eaab839a9273ed156ebfccbd40c15d1e72f3d8.tar.xz linux-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/xfs_mount.h')
| -rw-r--r-- | fs/xfs/xfs_mount.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index 81829d19596e..bb67274ee23f 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -170,6 +170,12 @@ typedef struct xfs_mount { * extents or anything related to the rt device. */ struct percpu_counter m_delalloc_blks; + /* + * Global count of allocation btree blocks in use across all AGs. Only + * used when perag reservation is enabled. Helps prevent block + * reservation from attempting to reserve allocation btree blocks. + */ + atomic64_t m_allocbt_blks; struct radix_tree_root m_perag_tree; /* per-ag accounting info */ spinlock_t m_perag_lock; /* lock for m_perag_tree */ |