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author | 2010-10-23 11:18:01 -0400 | |
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committer | 2010-10-25 21:26:11 -0400 | |
commit | f991bd2e14210fb93d722cb23e54991de20e8a3d (patch) | |
tree | 60643fb9d828c388d963ceb26504dce9890eabbb /fs/ntfs/collate.h | |
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/ntfs/collate.h')
0 files changed, 0 insertions, 0 deletions