linux-kernel - Re: [PATCH] sched: sync with the cfs

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 13 Aug 2015 10:30:49 +0800
From:	Yuyang Du <yuyang.du@...el.com>
To:	Byungchul Park <byungchul.park@....com>
Cc:	mingo@...nel.org, peterz@...radead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sched: sync with the cfs_rq when changing sched class

On Thu, Aug 13, 2015 at 04:19:04PM +0900, Byungchul Park wrote:
> > >  #ifdef CONFIG_SMP
> > >  	/* synchronize task with its prev cfs_rq */
> > > -	if (!queued)
> > > -		__update_load_avg(cfs_rq->avg.last_update_time, cpu_of(rq_of(cfs_rq)),
> > > -				&se->avg, se->on_rq * scale_load_down(se->load.weight),
> > > -				cfs_rq->curr == se, NULL);
> > > -
> > > -	/* remove our load when we leave */
> > > -	cfs_rq->avg.load_avg = max_t(long, cfs_rq->avg.load_avg - se->avg.load_avg, 0);
> > > -	cfs_rq->avg.load_sum = max_t(s64, cfs_rq->avg.load_sum - se->avg.load_sum, 0);
> > > -	cfs_rq->avg.util_avg = max_t(long, cfs_rq->avg.util_avg - se->avg.util_avg, 0);
> > > -	cfs_rq->avg.util_sum = max_t(s32, cfs_rq->avg.util_sum - se->avg.util_sum, 0);
> > > +	detach_entity_load_avg(cfs_rq, se);
> > >  #endif
> > 
> > You changed the logic.
> 
> yes, i changed it. but i think that calling __update_load_avg() is not
> a problem even in case of "queued == 1". so i didn't think that change
> seriously.
> 
> wrong? :(
> 

It is not a problem, but any good or maybe any bad? And I would suggest you
add the comment I gave you.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/