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xen-devel
[Xen-devel] Re: [patch 2/8] Implement always-locked bit ops, for memory
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To: |
Christoph Lameter <clameter@xxxxxxx> |
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Subject: |
[Xen-devel] Re: [patch 2/8] Implement always-locked bit ops, for memory shared with an SMP hypervisor. |
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From: |
Jeremy Fitzhardinge <jeremy@xxxxxxxx> |
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Date: |
Wed, 02 Aug 2006 17:35:56 -0700 |
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Cc: |
akpm@xxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxx, Jeremy Fitzhardinge <jeremy@xxxxxxxxxxxxx>, Ian Pratt <ian.pratt@xxxxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, Chris Wright <chrisw@xxxxxxxxxxxx>, virtualization@xxxxxxxxxxxxxx, Christian Limpach <Christian.Limpach@xxxxxxxxxxxx> |
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Thu, 03 Aug 2006 03:16:55 -0700 |
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Christoph Lameter wrote:
I think I asked this before....
Would it not be simpler to always use the locked implementation on UP? At
least when the kernel is compiled with hypervisor support? This is going
to add yet another series of bit operations
You mean make the standard bit-ops atomic on UP when compiling for
CONFIG_PARAVIRT? We think its too much of a burden; there are only a
few operations which must be locked in the hypervisor case, and bit ops
are used everywhere. I'd like to get it to the point where there's no
significant overhead in configuring for PARAVIRT, even if you run on
native hardware.
J
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- [Xen-devel] [patch 0/8] Basic infrastructure patches for a paravirtualized kernel, Jeremy Fitzhardinge
- [Xen-devel] [patch 1/8] Remove locally-defined ldt structure in favour of standard type., Jeremy Fitzhardinge
- [Xen-devel] [patch 4/8] Replace sensitive instructions with macros., Jeremy Fitzhardinge
- [Xen-devel] [patch 2/8] Implement always-locked bit ops, for memory shared with an SMP hypervisor., Jeremy Fitzhardinge
- [Xen-devel] Re: [patch 2/8] Implement always-locked bit ops, for memory shared with an SMP hypervisor., Christoph Lameter
- [Xen-devel] Re: [patch 2/8] Implement always-locked bit ops, for memory shared with an SMP hypervisor.,
Jeremy Fitzhardinge <=
- [Xen-devel] Re: [patch 2/8] Implement always-locked bit ops, for memory shared with an SMP hypervisor., Christoph Lameter
- [Xen-devel] Re: [patch 2/8] Implement always-locked bit ops, for memory shared with an SMP hypervisor., Zachary Amsden
- [Xen-devel] Re: [patch 2/8] Implement always-locked bit ops, for memory shared with an SMP hypervisor., Christoph Lameter
- [Xen-devel] Re: [patch 2/8] Implement always-locked bit ops, for memory shared with an SMP hypervisor., Andi Kleen
- [Xen-devel] Re: [patch 2/8] Implement always-locked bit ops, for memory shared with an SMP hypervisor., Christoph Lameter
- [Xen-devel] Re: [patch 2/8] Implement always-locked bit ops, for memory shared with an SMP hypervisor., Andi Kleen
- [Xen-devel] Re: [patch 2/8] Implement always-locked bit ops, for memory shared with an SMP hypervisor., Andi Kleen
- [Xen-devel] Re: [patch 2/8] Implement always-locked bit ops, for memory shared with an SMP hypervisor., Christoph Lameter
- [Xen-devel] Re: [patch 2/8] Implement always-locked bit ops, for memory shared with an SMP hypervisor., Andi Kleen
- [Xen-devel] Re: [patch 2/8] Implement always-locked bit ops, for memory shared with an SMP hypervisor., Christoph Lameter
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