From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: Elena Ufimtseva <ufimtseva@gmail.com>,
"xen-devel@lists.xen.org" <xen-devel@lists.xen.org>
Subject: Re: xen pv hugepages
Date: Thu, 06 Feb 2014 18:59:23 -0500 [thread overview]
Message-ID: <d58a88c5-9666-40c8-b364-ff425dfd2a32@email.android.com> (raw)
In-Reply-To: <CAEr7rXhSLu8MhKjoYye5C+3Q90ikWLn184eUyTDDoyXhHmiJ2g@mail.gmail.com>
On February 6, 2014 5:17:44 PM EST, Elena Ufimtseva <ufimtseva@gmail.com> wrote:
>Hello
>
>As I can see there is no support for hugepages in Xen for PV kernels.
>Is this something in the future plans or there is no really need to
>have this implemented?
It was implemented. The UEK2 kernel (Oracle's) and SLES (I think) has this implemented. But making it upstream means adding some Xen specific code in the generic code which is a no-go.
If you use PVH you get it for free. With the patches that Mukesh posted to enable some cpuid flags I was able to boot a guest with 2MB and 1GB pages without any trouble.
>
>I came across this paper
>https://www.kernel.org/doc/ols/2011/ols2011-gadre.pdf,
>not sure if this was somehow presented to xen community, I can't find
>any code related to this.
>
>Thank you!
next prev parent reply other threads:[~2014-02-06 23:59 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-06 22:17 xen pv hugepages Elena Ufimtseva
2014-02-06 23:59 ` Konrad Rzeszutek Wilk [this message]
2014-02-07 0:12 ` Elena Ufimtseva
2014-02-07 10:41 ` Jan Beulich
2014-02-07 15:34 ` Konrad Rzeszutek Wilk
2014-02-07 10:38 ` Jan Beulich
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