lkml.org 
[lkml]   [2009]   [Jun]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [tip:sched/urgent] sched: Hide runqueues from direct refer at source code level
From
From: Ingo Molnar <mingo@elte.hu>
Subject: Re: [tip:sched/urgent] sched: Hide runqueues from direct refer at source code level
Date: Mon, 22 Jun 2009 17:35:22 +0200

> >
> > Thanks for your fix, I didn't notice...
> > I wrote a patch to fix these two points.
> >
> > After applying this patch,
> > all direct reference to runqueues is in macros. How is this?
> >
> > Signed-off-by: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
> >
> > diff --git a/kernel/sched.c b/kernel/sched.c
> > index 8ec9d13..e2ca8c1 100644
> > --- a/kernel/sched.c
> > +++ b/kernel/sched.c
> > @@ -692,6 +692,7 @@ static inline int cpu_of(struct rq *rq)
> > #define this_rq() (&__get_cpu_var(runqueues))
> > #define task_rq(p) cpu_rq(task_cpu(p))
> > #define cpu_curr(cpu) (cpu_rq(cpu)->curr)
> > +#define raw_rq() (&__raw_get_cpu_var(runqueues))
> >
> > inline void update_rq_clock(struct rq *rq)
> > {
> > @@ -6625,7 +6626,7 @@ EXPORT_SYMBOL(yield);
> > */
> > void __sched io_schedule(void)
> > {
> > - struct rq *rq = &__raw_get_cpu_var(runqueues);
> > + struct rq *rq = raw_rq();
> >
> > delayacct_blkio_start();
> > atomic_inc(&rq->nr_iowait);
> > @@ -6637,7 +6638,7 @@ EXPORT_SYMBOL(io_schedule);
> >
> > long __sched io_schedule_timeout(long timeout)
> > {
> > - struct rq *rq = &__raw_get_cpu_var(runqueues);
> > + struct rq *rq = raw_rq();
> > long ret;
> >
> > delayacct_blkio_start();
>
> Looks good - mind submitting a separate patch with a changelog, etc?
>
> Ingo
>

No, I have no fix to post now. Thanks.



\
 
 \ /
  Last update: 2009-06-23 06:33    [W:0.047 / U:0.408 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site