From: Ingo Molnar <mingo@elte.hu>
To: Zachary Amsden <zach@vmware.com>
Cc: Linus Torvalds <torvalds@osdl.org>,
Jeffrey Sheldon <jeffshel@vmware.com>,
Ole Agesen <agesen@vmware.com>, Shai Fultheim <shai@scalex86.org>,
Andrew Morton <akpm@odsl.org>, Jack Lo <jlo@vmware.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Virtualization Mailing List <virtualization@lists.osdl.org>,
Chris Wright <chrisw@osdl.org>, Martin Bligh <mbligh@mbligh.org>,
Pratap Subrahmanyam <pratap@vmware.com>,
Christopher Li <chrisl@vmware.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Zwane Mwaikambo <zwane@arm.linux.org.uk>, Andi Kleen <ak@muc.de>
Subject: Re: [PATCH 3/3] Gdt page isolation
Date: Thu, 22 Sep 2005 10:59:31 +0200 [thread overview]
Message-ID: <20050922085931.GC25909@elte.hu> (raw)
In-Reply-To: <200509220749.j8M7nINV001001@zach-dev.vmware.com>
* Zachary Amsden <zach@vmware.com> wrote:
> Make GDT page aligned and page padded to support running inside of a
> hypervisor. This prevents false sharing of the GDT page with other
> hot data, which is not allowed in Xen, and causes performance problems
> in VMware.
>
> Rather than go back to the old method of statically allocating the GDT
> (which wastes unneded space for non-present CPUs), the GDT for APs is
> allocated dynamically.
>
> Signed-off-by: Zachary Amsden <zach@vmware.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Ingo
next prev parent reply other threads:[~2005-09-22 8:58 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-22 7:49 [PATCH 3/3] Gdt page isolation Zachary Amsden
2005-09-22 8:59 ` Ingo Molnar [this message]
2005-09-22 13:17 ` Andi Kleen
2005-09-22 13:34 ` Ingo Molnar
2005-09-22 13:38 ` Andi Kleen
2005-09-23 19:00 ` Zachary Amsden
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