From: Rohit <rohit.kr@samsung.com>
Date: Wed, 15 Oct 2014 12:10:41 +0000 (+0530)
Subject: Security: smack: replace kzalloc with kmem_cache for inode_smack
X-Git-Tag: omap-for-v3.19/fixes-rc1~83^2~1^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1a5b472bde752783e0a31b59c61c9ff5b37a0983;p=pandora-kernel.git

Security: smack: replace kzalloc with kmem_cache for inode_smack

The patch use kmem_cache to allocate/free inode_smack since they are
alloced in high volumes making it a perfect case for kmem_cache.

As per analysis, 24 bytes of memory is wasted per allocation due
to internal fragmentation. With kmem_cache, this can be avoided.

Accounting of memory allocation is below :
 total       slack            net      count-alloc/free        caller
Before (with kzalloc)
1919872      719952          1919872      29998/0          new_inode_smack+0x14

After (with kmem_cache)
1201680          0           1201680      30042/0          new_inode_smack+0x18

>From above data, we found that 719952 bytes(~700 KB) of memory is
saved on allocation of 29998 smack inodes.

Signed-off-by: Rohit <rohit.kr@samsung.com>
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