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| author | Sangwoo <[email protected]> | 2015-10-21 17:44:30 -0400 |
|---|---|---|
| committer | Paul Moore <[email protected]> | 2015-10-21 17:44:30 -0400 |
| commit | 63205654c0e05e5ffa1c6eef2fbef21dcabd2185 (patch) | |
| tree | 52f244ee4d88b385b1bf5fd038818a383557c8c1 /tools/perf/scripts/python/bin/export-to-postgresql-report | |
| parent | 1d2a168a085f1c65b895f258ee11a52813d25af6 (diff) | |
selinux: Use a kmem_cache for allocation struct file_security_struct
The size of struct file_security_struct is 16byte at my setup.
But, the real allocation size for per each file_security_struct
is 64bytes in my setup that kmalloc min size is 64bytes
because ARCH_DMA_MINALIGN is 64.
This allocation is called every times at file allocation(alloc_file()).
So, the total slack memory size(allocated size - request size)
is increased exponentially.
E.g) Min Kmalloc Size : 64bytes, Unit : bytes
Allocated Size | Request Size | Slack Size | Allocation Count
---------------------------------------------------------------
770048 | 192512 | 577536 | 12032
At the result, this change reduce memory usage 42bytes per each
file_security_struct
Signed-off-by: Sangwoo <[email protected]>
Acked-by: Stephen Smalley <[email protected]>
[PM: removed extra subject prefix]
Signed-off-by: Paul Moore <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/bin/export-to-postgresql-report')
0 files changed, 0 insertions, 0 deletions