Messages in this thread Patch in this message | | | Subject | [PATCH] sched: reorder root_domain to remove 64 bit alignment padding | From | Richard Kennedy <> | Date | Fri, 15 Jul 2011 11:41:31 +0100 |
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Reorder root_domain to remove 8 bytes of alignment padding on 64 bit builds, this shrinks the size from 1736 to 1728 bytes, therefore using one fewer cachelines.
Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk> ---
patch against v3.0-rc7
compiled & booted on x86_64.
I've been running this patch for 2 days without any obvious problems, but I don't have any specific RT test cases.
regards Richard
diff --git a/kernel/sched.c b/kernel/sched.c index 9769c75..4ecf9db 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -422,6 +422,7 @@ struct rt_rq { */ struct root_domain { atomic_t refcount; + atomic_t rto_count; struct rcu_head rcu; cpumask_var_t span; cpumask_var_t online; @@ -431,7 +432,6 @@ struct root_domain { * one runnable RT task. */ cpumask_var_t rto_mask; - atomic_t rto_count; struct cpupri cpupri; };
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