From: Michael wang <wangyun@linux.vnet.ibm.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Sasha Levin <sasha.levin@oracle.com>,
Ingo Molnar <mingo@kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: sched: hang in migrate_swap
Date: Mon, 24 Feb 2014 18:14:24 +0800 [thread overview]
Message-ID: <530B1B80.4000307@linux.vnet.ibm.com> (raw)
In-Reply-To: <20140224071028.GW9987@twins.programming.kicks-ass.net>
On 02/24/2014 03:10 PM, Peter Zijlstra wrote:
> On Mon, Feb 24, 2014 at 01:19:15PM +0800, Michael wang wrote:
>> Peter, do we accidentally missed this commit?
>>
>> http://git.kernel.org/tip/477af336ba06ef4c32e97892bb0d2027ce30f466
>
> Ingo dropped it on Saturday because it makes locking_selftest() unhappy.
>
> That is because we call locking_selftest() way before we're ready to
> call schedule() and guess what it does :-/
>
> I'm not entirely sure what to do.. ideally I'd shoot locking_selftest in
> the head, but clearly that's not entirely desired either.
...what about move idle_balance() back to it's old position?
pull_rt_task() logical could be after idle_balance() if still no FAIR
and DL, then go into the pick loop, that may could make things more
clean & clear, should we have a try?
Regards,
Michael Wang
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next prev parent reply other threads:[~2014-02-24 10:14 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-19 18:08 sched: hang in migrate_swap Sasha Levin
2014-02-20 4:32 ` Michael wang
2014-02-21 16:43 ` Sasha Levin
2014-02-22 1:45 ` Michael wang
2014-02-24 3:23 ` Sasha Levin
2014-02-24 5:19 ` Michael wang
2014-02-24 5:54 ` Sasha Levin
2014-02-24 7:10 ` Peter Zijlstra
2014-02-24 10:14 ` Michael wang [this message]
2014-02-24 12:12 ` Peter Zijlstra
2014-02-24 13:10 ` Peter Zijlstra
2014-02-25 4:47 ` Michael wang
2014-02-25 10:49 ` Peter Zijlstra
2014-02-26 2:32 ` Michael wang
2014-02-24 18:21 ` Sasha Levin
2014-02-25 2:48 ` Michael wang
2014-02-25 11:03 ` Peter Zijlstra
2014-02-25 3:01 ` Michael wang
2014-02-27 13:33 ` [tip:sched/core] sched: Guarantee task priority in pick_next_task () tip-bot for Peter Zijlstra
2014-04-10 3:31 ` sched: hang in migrate_swap Sasha Levin
2014-04-10 6:59 ` Michael wang
2014-04-10 13:38 ` Kirill Tkhai
2014-04-11 14:32 ` Sasha Levin
2014-04-11 15:16 ` Kirill Tkhai
2014-05-12 18:48 ` Sasha Levin
2014-05-14 9:42 ` Kirill Tkhai
2014-05-14 10:13 ` Peter Zijlstra
2014-05-14 10:21 ` Kirill Tkhai
2014-05-14 10:26 ` Peter Zijlstra
2014-05-14 11:20 ` Peter Zijlstra
2015-06-15 19:38 ` Rafael David Tinoco
2015-06-15 19:47 ` Peter Zijlstra
2014-04-18 8:24 ` [tip:sched/urgent] sched: Check for stop task appearance when balancing happens tip-bot for Kirill Tkhai
2014-04-10 7:42 ` sched: hang in migrate_swap Peter Zijlstra
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