[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-ID: <011001cff827$f14b9870$d3e2c950$@alibaba-inc.com>
Date: Tue, 04 Nov 2014 20:07:44 +0800
From: "Hillf Danton" <hillf.zj@...baba-inc.com>
To: "'Vincent Guittot'" <vincent.guittot@...aro.org>
Cc: "'Wanpeng Li'" <kernellwp@...il.com>,
"'Peter Zijlstra'" <peterz@...radead.org>,
"'Ingo Molnar'" <mingo@...nel.org>,
"'linux-kernel'" <linux-kernel@...r.kernel.org>,
"'Preeti U Murthy'" <preeti@...ux.vnet.ibm.com>,
"'Morten Rasmussen'" <Morten.Rasmussen@....com>,
"'Kamalesh Babulal'" <kamalesh@...ux.vnet.ibm.com>
Subject: Re: [PATCH v8 03/10] sched: move cfs task on a CPU with higher capacity
> >> + /*
> >> + * The dst_cpu is idle and the src_cpu CPU has only 1 CFS task.
> >
> >
> > Why specify one task instead of not less than one?
>
> if cfs.h_nr_running = 0 (which should not occurs at that point), we
> don't need to do more test to check if it's worth moving the task
> because there is no task to move.
>
I wonder if you can please shed light on the case that
the dst_cpu is newly idle.
Thanks
Hillf
--
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/
Powered by blists - more mailing lists