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Message-ID: <1332157166.18960.299.camel@twins>
Subject: Re: [RFC][PATCH 00/26] sched/numa
From: Peter Zijlstra <peterz@infradead.org>
To: Avi Kivity <avi@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
        Andrew Morton <akpm@linux-foundation.org>,
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        Suresh Siddha <suresh.b.siddha@intel.com>,
        Mike Galbraith <efault@gmx.de>,
        "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
        Lai Jiangshan <laijs@cn.fujitsu.com>, Dan Smith <danms@us.ibm.com>,
        Bharata B Rao <bharata.rao@gmail.com>,
        Lee Schermerhorn <Lee.Schermerhorn@hp.com>,
        Andrea Arcangeli <aarcange@redhat.com>, Rik van Riel <riel@redhat.com>,
        Johannes Weiner <hannes@cmpxchg.org>, linux-kernel@vger.kernel.org,
        linux-mm@kvack.org
Date: Mon, 19 Mar 2012 12:39:26 +0100
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On Mon, 2012-03-19 at 12:12 +0100, Peter Zijlstra wrote:
> > - doesn't work well with large pages
> 
> That's for someone who cares about large pages to sort, isn't it? Also,
> I thought you virt people only used THP anyway, and those work just fine
> (they get broken down, and presumably something will build them back up
> on the other side). 

Note that all it would take is to make THP swap work. That on its own
might make sense too since writing a 2M stip of data is probably as fast
as a single 4K page on many of the rotating rust things. No idea on SSD,
but those things are typically fast either way.