linux-kernel - [PATCH 0/5] x86/paravirt: clean up paravirt.h and optimise FPU context switch

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Message-Id: <1244748040-27185-1-git-send-email-jeremy@goop.org>
Date:	Thu, 11 Jun 2009 12:20:35 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	the arch/x86 maintainers <x86@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH 0/5] x86/paravirt: clean up paravirt.h and optimise FPU context switch

Hi Ingo,

This series:
 - splits asm/paravirt.h into paravirt.h and paravirt_types.h
 - splits out the context switch core of math_state_restore into __math_state_restore
 - rearranges 32 and 64 bit context switch to be the same and to properly
   batch FPU context switches when running paravirtualized

There should be no performance side-effects of these changes.  They amount
to a small rearrangement of the existing code (and bringing the 64-bit
code a bit closer to 32-bit, countering some genetic drift).

I think these are probably safe to go into this merge window, but I
don't think I've posted these before, so I understand if you're hesitant
(I've had them applied locally for some time with no ill-effects).
The paravirt cleanup is pure movement between headers, so I don't think
there's much risk there at all.

 arch/x86/include/asm/i387.h           |    1 +
 arch/x86/include/asm/paravirt.h       |  711 +--------------------------------
 arch/x86/include/asm/paravirt_types.h |  720 +++++++++++++++++++++++++++++++++
 arch/x86/kernel/process_32.c          |   27 +-
 arch/x86/kernel/process_64.c          |   33 +-
 arch/x86/kernel/traps.c               |   33 +-
 6 files changed, 782 insertions(+), 743 deletions(-)

Thanks,
	J

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