From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
To: mgorman@suse.de
Cc: minchan.kim@gmail.com, abarry@cray.com,
akpm@linux-foundation.org, linux-mm@kvack.org, riel@redhat.com,
hannes@cmpxchg.org, linux-kernel@vger.kernel.org
Subject: Re: Unending loop in __alloc_pages_slowpath following OOM-kill; rfc: patch.
Date: Wed, 25 May 2011 08:53:20 +0900 [thread overview]
Message-ID: <4DDC44F0.6090809@jp.fujitsu.com> (raw)
In-Reply-To: <20110524105746.GF5279@suse.de>
>> In old days, we always call drain_all_pages() if did_some_progress!=0. But
>> current kernel only call it when get_page_from_freelist() fail. So,
>> wait_iff_congested() may help but no guarantee to help us.
>>
>> If you still strongly worry about IPI cost, I'm concern to move drain_all_pages()
>> to more unfrequently point. but to ignore pcp makes less sense, IMHO.
>>
>
> Yes, I'm worried about it because excessive time
> spent in drain_all_pages() has come up on the past
> http://lkml.org/lkml/2010/8/23/81 . The PCP lists are not being
> ignored at the moment. They are drained when direct reclaim makes
> forward progress but still fails to allocate a page.
Well, it's no priority==0 case. that's my point.
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next prev parent reply other threads:[~2011-05-24 23:53 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-13 21:31 Andrew Barry
2011-05-17 10:34 ` Minchan Kim
2011-05-17 11:34 ` Mel Gorman
2011-05-17 15:49 ` Andrew Barry
2011-05-18 22:29 ` Minchan Kim
2011-05-20 16:49 ` Minchan Kim
2011-05-20 17:16 ` Rik van Riel
2011-05-20 17:23 ` Mel Gorman
2011-05-24 4:54 ` KOSAKI Motohiro
2011-05-24 5:45 ` KOSAKI Motohiro
2011-05-24 8:30 ` Mel Gorman
2011-05-24 8:36 ` KOSAKI Motohiro
2011-05-24 8:49 ` Mel Gorman
2011-05-24 9:05 ` KOSAKI Motohiro
2011-05-24 9:16 ` Mel Gorman
2011-05-24 9:40 ` KOSAKI Motohiro
2011-05-24 10:57 ` Mel Gorman
2011-05-24 23:53 ` KOSAKI Motohiro [this message]
2011-05-24 8:34 ` Minchan Kim
2011-05-24 8:41 ` KOSAKI Motohiro
2011-05-24 8:57 ` Minchan Kim
2011-05-24 9:36 ` KOSAKI Motohiro
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