From: Christopher Lameter <cl@linux.com>
To: Andi Kleen <ak@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Peter Zijlstra <peterz@infradead.org>,
"Liang, Kan" <kan.liang@intel.com>,
Mel Gorman <mgorman@techsingularity.net>,
Mel Gorman <mgorman@suse.de>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Tim Chen <tim.c.chen@linux.intel.com>,
Ingo Molnar <mingo@elte.hu>,
Andrew Morton <akpm@linux-foundation.org>,
Johannes Weiner <hannes@cmpxchg.org>, Jan Kara <jack@suse.cz>,
linux-mm <linux-mm@kvack.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 1/2] sched/wait: Break up long wake list walk
Date: Tue, 22 Aug 2017 16:08:52 -0500 (CDT) [thread overview]
Message-ID: <alpine.DEB.2.20.1708221605220.18344@nuc-kabylake> (raw)
In-Reply-To: <20170822193714.GZ28715@tassilo.jf.intel.com>
On Tue, 22 Aug 2017, Andi Kleen wrote:
> We only see it on 4S+ today. But systems are always getting larger,
> so what's a large system today, will be a normal medium scale system
> tomorrow.
>
> BTW we also collected PT traces for the long hang cases, but it was
> hard to find a consistent pattern in them.
Hmmm... Maybe it would be wise to limit the pages autonuma can migrate?
If a page has more than 50 refcounts or so then dont migrate it. I think
high number of refcounts and a high frequewncy of calls are reached in
particular for pages of the c library. Attempting to migrate those does
not make much sense anyways because the load may shift and another
function may become popular. We may end up shifting very difficult to
migrate pages back and forth.
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next prev parent reply other threads:[~2017-08-22 21:08 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-15 0:52 Tim Chen
2017-08-15 0:52 ` [PATCH 2/2] sched/wait: Introduce lock breaker in wake_up_page_bit Tim Chen
2017-08-15 1:48 ` [PATCH 1/2] sched/wait: Break up long wake list walk Linus Torvalds
2017-08-15 2:27 ` Andi Kleen
2017-08-15 2:52 ` Linus Torvalds
2017-08-15 3:15 ` Andi Kleen
2017-08-15 3:28 ` Linus Torvalds
2017-08-15 19:05 ` Tim Chen
2017-08-15 19:41 ` Linus Torvalds
2017-08-15 19:47 ` Linus Torvalds
2017-08-15 22:47 ` Davidlohr Bueso
2017-08-15 22:56 ` Linus Torvalds
2017-08-15 22:57 ` Linus Torvalds
2017-08-15 23:50 ` Linus Torvalds
2017-08-16 23:22 ` Eric W. Biederman
2017-08-17 16:17 ` Liang, Kan
2017-08-17 16:25 ` Linus Torvalds
2017-08-17 20:18 ` Liang, Kan
2017-08-17 20:44 ` Linus Torvalds
2017-08-18 12:23 ` Mel Gorman
2017-08-18 14:20 ` Liang, Kan
2017-08-18 14:46 ` Mel Gorman
2017-08-18 16:36 ` Tim Chen
2017-08-18 16:45 ` Andi Kleen
2017-08-18 16:53 ` Liang, Kan
2017-08-18 17:48 ` Linus Torvalds
2017-08-18 18:54 ` Mel Gorman
2017-08-18 19:14 ` Linus Torvalds
2017-08-18 19:58 ` Andi Kleen
2017-08-18 20:10 ` Linus Torvalds
2017-08-21 18:32 ` Mel Gorman
2017-08-21 18:56 ` Liang, Kan
2017-08-22 17:23 ` Liang, Kan
2017-08-22 18:19 ` Linus Torvalds
2017-08-22 18:25 ` Linus Torvalds
2017-08-22 18:56 ` Peter Zijlstra
2017-08-22 19:15 ` Linus Torvalds
2017-08-22 19:08 ` Peter Zijlstra
2017-08-22 19:30 ` Linus Torvalds
2017-08-22 19:37 ` Andi Kleen
2017-08-22 21:08 ` Christopher Lameter [this message]
2017-08-22 21:24 ` Andi Kleen
2017-08-22 22:52 ` Linus Torvalds
2017-08-22 23:19 ` Linus Torvalds
2017-08-23 14:51 ` Liang, Kan
2017-08-22 19:55 ` Liang, Kan
2017-08-22 20:42 ` Linus Torvalds
2017-08-22 20:53 ` Peter Zijlstra
2017-08-22 20:58 ` Linus Torvalds
2017-08-23 14:49 ` Liang, Kan
2017-08-23 15:58 ` Tim Chen
2017-08-23 18:17 ` Linus Torvalds
2017-08-23 20:55 ` Liang, Kan
2017-08-23 23:30 ` Linus Torvalds
2017-08-24 17:49 ` Tim Chen
2017-08-24 18:16 ` Linus Torvalds
2017-08-24 20:44 ` Mel Gorman
2017-08-25 16:44 ` Tim Chen
2017-08-23 16:04 ` Mel Gorman
2017-08-18 20:05 ` Andi Kleen
2017-08-18 20:29 ` Linus Torvalds
2017-08-18 20:29 ` Liang, Kan
2017-08-18 20:34 ` Linus Torvalds
2017-08-18 16:55 ` Linus Torvalds
2017-08-18 13:06 ` Liang, Kan
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