Messages in this thread Patch in this message | | | Subject | [PATCH] timer_list: remove alignment padding on 64 bit when CONFIG_TIMER_STATS | From | Richard Kennedy <> | Date | Mon, 26 Jul 2010 09:54:52 +0100 |
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Re-order structure timer_list to remove 8 bytes of alignment padding on 64 bit builds when CONFIG_TIMER_STATS is selected.
timer_list is widely used across the kernel so many structures will benefit and shrink in size.
For example, with my config on x86_64 per_cpu_dm_data shrinks from 136 to 128 bytes and ahci_port_priv shrinks from 1032 to 968 bytes.
Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk>
--- patch against v2.6.35-rc6 compiled & tested on x86_64
regards Richard
diff --git a/include/linux/timer.h b/include/linux/timer.h index ea965b8..14a6fd4 100644 --- a/include/linux/timer.h +++ b/include/linux/timer.h @@ -24,9 +24,9 @@ struct timer_list { int slack; #ifdef CONFIG_TIMER_STATS + int start_pid; void *start_site; char start_comm[16]; - int start_pid; #endif #ifdef CONFIG_LOCKDEP struct lockdep_map lockdep_map;
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