From: Ric Mason <ric.masonn@gmail.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: linux-mm@kvack.org, Hillf Danton <dhillf@gmail.com>
Subject: Re: Support variable-sized huge pages
Date: Sun, 24 Feb 2013 15:00:18 +0800 [thread overview]
Message-ID: <5129BA82.5070907@gmail.com> (raw)
In-Reply-To: <20130131105227.GI30577@one.firstfloor.org>
On 01/31/2013 06:52 PM, Andi Kleen wrote:
> On Thu, Jan 31, 2013 at 02:23:10AM -0600, Ric Mason wrote:
>> Hi all,
>>
>> It seems that Andi's "Support more pagesizes for
>> MAP_HUGETLB/SHM_HUGETLB" patch has already merged. According to the
>> patch, x86 will support 2MB and 1GB huge pages. But I just see
>> hugepages-2048kB under /sys/kernel/mm/hugepages/ on my x86_32 PAE desktop.
>> Where is 1GB huge pages?
> 1GB pages are only supported under 64bit kernels, and also
> only if you allocate them explicitely with boot options.
It seem that before your patch, we also can set mutiple hugepagesz, but
hugetlbfs just mount default size, correct? IIUC, how can different size
huge pages be used? If set mutiple hugepagesz, which one is default size?
>
> -Andi
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prev parent reply other threads:[~2013-02-24 7:00 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-31 8:23 Support variable-sized huge pages Ric Mason
2013-01-31 8:57 ` Jianguo Wu
2013-01-31 10:52 ` Andi Kleen
2013-02-05 5:48 ` Ric Mason
2013-02-05 9:51 ` Michal Hocko
2013-02-05 14:08 ` Andi Kleen
2013-02-24 7:00 ` Ric Mason [this message]
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