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| author |   Eric Dumazet <eric.dumazet@gmail.com> | 2010-10-23 11:18:01 -0400 |
|---|---|---|
| committer |   Al Viro <viro@zeniv.linux.org.uk> | 2010-10-25 21:26:11 -0400 |
| commit | f991bd2e14210fb93d722cb23e54991de20e8a3d (patch) | |
| tree | 60643fb9d828c388d963ceb26504dce9890eabbb /fs/ext4/mballoc.c | |
| parent | new helper: ihold() (diff) | |
| download | linux-dev-f991bd2e14210fb93d722cb23e54991de20e8a3d.tar.xz linux-dev-f991bd2e14210fb93d722cb23e54991de20e8a3d.zip | |
fs: introduce a per-cpu last_ino allocator
new_inode() dirties a contended cache line to get increasing
inode numbers. This limits performance on workloads that cause
significant parallel inode allocation.
Solve this problem by using a per_cpu variable fed by the shared
last_ino in batches of 1024 allocations. This reduces contention on
the shared last_ino, and give same spreading ino numbers than before
(i.e. same wraparound after 2^32 allocations).
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/ext4/mballoc.c')
0 files changed, 0 insertions, 0 deletions