linux-kernel - Re: [RFC PATCH 0/4] Gang scheduling in CFS

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Message-ID: <20111230095147.GA10543@elte.hu>
Date:	Fri, 30 Dec 2011 10:51:47 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Avi Kivity <avi@...hat.com>
Cc:	Nikunj A Dadhania <nikunj@...ux.vnet.ibm.com>,
	peterz@...radead.org, linux-kernel@...r.kernel.org,
	vatsa@...ux.vnet.ibm.com, bharata@...ux.vnet.ibm.com
Subject: Re: [RFC PATCH 0/4] Gang scheduling in CFS


* Avi Kivity <avi@...hat.com> wrote:

> [...]
> 
> The first part appears to be unrelated to ebizzy itself - it's 
> the kunmap_atomic() flushing ptes.  It could be eliminated by 
> switching to a non-highmem kernel, or by allocating more PTEs 
> for kmap_atomic() and batching the flush.

Nikunj, please only run pure 64-bit/64-bit combinations - by the 
time any fix goes upstream and trickles down to distros 32-bit 
guests will be even less relevant than they are today.

Thanks,

	Ingo
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