tree 5e949f9f68c93ad4a487aa84aa959a5658cfd321
parent 3ae4eed34be0177a8e003411a84e4ee212adbced
author Richard Kennedy <richard@rsk.demon.co.uk> 1216975715 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1217008425 -0700

shrink struct pid by removing padding on 64 bit builds

When struct pid is built on a 64 bit platform gcc has to insert padding to
maintain the correct alignment, by simply reordering its members the
memory usage shrinks from 88 bytes to 80.

I've successfully run with this patch on my desktop AMD64 machine.

There are no significant kernel size changes to a default config.X86_64
on the latest git v2.6.26-rc1

   text    data     bss     dec     hex filename
5404828  976760  734280 7115868  6c945c vmlinux
5404811  976760  734280 7115851  6c944b vmlinux.pid-patch

Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>