From mboxrd@z Thu Jan  1 00:00:00 1970
From: Anthony Liguori <anthony@codemonkey.ws>
Subject: Re: patch: qemu + hugetlbfs..
Date: Wed, 09 Jul 2008 12:11:50 -0500
Message-ID: <4874F156.2010708@codemonkey.ws>
References: <4873E400.4000409@third-harmonic.com> <4873F395.6030209@codemonkey.ws> <4874051A.8000802@third-harmonic.com> <48740F86.3050306@codemonkey.ws> <20080709170301.GA11439@dmt.cnet>
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Cc: john cooper <john.cooper@third-harmonic.com>, kvm@vger.kernel.org,
	john.cooper@redhat.com
To: Marcelo Tosatti <mtosatti@redhat.com>
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Marcelo Tosatti wrote:
> On Tue, Jul 08, 2008 at 08:08:22PM -0500, Anthony Liguori wrote:
>   
>> john cooper wrote:
>>     
>>> I like it even less.  MAP_POPULATE does not fault in physical
>>> hpages to the map.  Again this was a qemu-side interim bandaid.
>>>       
>> Really?  That would seem like a bug in hugetlbfs to me.
>>     
>
> This is Linux's behaviour for all filesystems. There is no error
> checking on MAP_POPULATE's attempt to prefault pages.
>   

I thought that mmap() will fail with hugetlbfs if enough large pages 
can't be reserved?

Regards,

Anthony Liguori