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[Xen-devel] Re: [patch 13/26] Xen-paravirt_ops: Consistently wrap paravirt ops callsites to make them patchable
- To: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
- From: Andi Kleen <ak@xxxxxx>
- Date: 20 Mar 2007 20:28:18 +0100
- Date: Tue, 20 Mar 2007 20:28:18 +0100
- Cc: Zachary Amsden <zach@xxxxxxxxxx>, Jeremy Fitzhardinge <jeremy@xxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, akpm@xxxxxxxxxxxxxxxxxxxx, netdev@xxxxxxxxxxxxxxx, Rusty Russell <rusty@xxxxxxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, chrisw@xxxxxxxxxxxx, virtualization@xxxxxxxxxxxxxx, "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>, anthony@xxxxxxxxxxxxx, mingo@xxxxxxx, David Miller <davem@xxxxxxxxxxxxx>
- Delivery-date: Tue, 20 Mar 2007 12:27:24 -0700
- List-id: Xen developer discussion <xen-devel.lists.xensource.com>
> But I was throwing that out as a long-term thing. I'm not claiming it's
> trivial, but it should be doable.
One thing I was pondering was to replace the expensive popfs with
bt $IF,(%rsp)
jnc 1f
sti
1:
But would be mostly a P4 optimization again and I'm not 100% sure it is
worth it.
-Andi
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