From: Guenter Roeck <linux@roeck-us.net>
To: paulmck@linux.vnet.ibm.com
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
sparclinux@vger.kernel.org, davem@davemloft.net
Subject: Re: next: Commit 'mm: Prevent __alloc_pages_nodemask() RCU CPU stall ...' causing hang on sparc32 qemu
Date: Thu, 1 Dec 2016 04:50:40 -0800 [thread overview]
Message-ID: <d489c061-00ff-2b1c-cf96-c4cf1bb7b2b6@roeck-us.net> (raw)
In-Reply-To: <20161201123409.GA3924@linux.vnet.ibm.com>
On 12/01/2016 04:34 AM, Paul E. McKenney wrote:
> On Wed, Nov 30, 2016 at 10:56:57PM -0800, Guenter Roeck wrote:
>> Hi Paul,
>>
>> On Wed, Nov 30, 2016 at 05:19:50PM -0800, Paul E. McKenney wrote:
>> [ ... ]
>>
>>>>>>
>>>>>> BUG: sleeping function called from invalid context at mm/page_alloc.c:3775
>> [ ... ]
>>>
>>> Whew! You had me going for a bit there. ;-)
>>
>> Bisect results are here ... the culprit is, again, commit 2d66cccd73 ("mm:
>> Prevent __alloc_pages_nodemask() RCU CPU stall warnings"), and reverting that
>> patch fixes the problem. Good that you dropped it already :-).
>
> "My work is done." ;-)
>
> And apologies for the hassle. I have no idea what I was thinking when
> I put the cond_resched_rcu_qs() there!
>
No worries.
Cheers,
Guenter
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prev parent reply other threads:[~2016-12-01 12:50 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-29 21:23 Guenter Roeck
2016-11-30 1:28 ` Paul E. McKenney
2016-11-30 4:32 ` Guenter Roeck
2016-11-30 7:02 ` Paul E. McKenney
2016-11-30 10:52 ` Guenter Roeck
2016-11-30 12:03 ` Paul E. McKenney
2016-11-30 19:21 ` Guenter Roeck
2016-11-30 21:01 ` Paul E. McKenney
2016-11-30 23:18 ` Guenter Roeck
2016-12-01 1:19 ` Paul E. McKenney
2016-12-01 6:56 ` Guenter Roeck
2016-12-01 12:34 ` Paul E. McKenney
2016-12-01 12:50 ` Guenter Roeck [this message]
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