From: Ingo Molnar <mingo@elte.hu>
To: Avi Kivity <avi@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/3] Remove interrupt stack table usage from x86_64 kernel
Date: Fri, 26 Dec 2008 10:15:22 +0100 [thread overview]
Message-ID: <20081226091521.GD27747@elte.hu> (raw)
In-Reply-To: <1230238726-17506-1-git-send-email-avi@redhat.com>
* Avi Kivity <avi@redhat.com> wrote:
> The interrupt stack table (IST) mechanism is the only thing preventing
> kvm from deferring saving and reloading of some significant state. It
> is also somewhat complicated.
>
> Remove it by switching the special exceptions to use the normal irqstack.
>
> Avi Kivity (3):
> x86: drop the use of the tss interrupt stack table (IST)
> x86: Remove pda.irqcount
> x86: Switch critical exceptions and NMI to irqstack
>
> arch/x86/include/asm/desc.h | 12 -----
> arch/x86/include/asm/page_64.h | 7 ---
> arch/x86/include/asm/pda.h | 2 +-
> arch/x86/include/asm/processor.h | 11 ----
> arch/x86/kernel/asm-offsets_64.c | 1 -
> arch/x86/kernel/cpu/common.c | 35 --------------
> arch/x86/kernel/dumpstack_64.c | 96 --------------------------------------
> arch/x86/kernel/entry_64.S | 49 ++++++++-----------
> arch/x86/kernel/traps.c | 12 ++--
> 9 files changed, 27 insertions(+), 198 deletions(-)
looks good. Please base your work on the tip/master tree, we have a ton of
pending (and conflicting) changes in the lowlevel assembly area:
http://people.redhat.com/mingo/tip.git/README
Ingo
next prev parent reply other threads:[~2008-12-26 9:15 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-25 20:58 [PATCH 0/3] Remove interrupt stack table usage from x86_64 kernel Avi Kivity
2008-12-25 20:58 ` [PATCH 1/3] x86: drop the use of the tss interrupt stack table (IST) Avi Kivity
2008-12-25 20:58 ` [PATCH 2/3] x86: Remove pda.irqcount Avi Kivity
2008-12-25 20:58 ` [PATCH 3/3] x86: Switch critical exceptions and NMI to irqstack Avi Kivity
2008-12-26 9:15 ` Ingo Molnar [this message]
[not found] ` <87vdt5vfxc.fsf@basil.nowhere.org>
[not found] ` <4956A0B1.1060908@redhat.com>
[not found] ` <20081227224029.GB496@one.firstfloor.org>
[not found] ` <49573FE7.9090802@redhat.com>
[not found] ` <20081228131605.GC496@one.firstfloor.org>
2008-12-28 14:09 ` [PATCH 0/3] Remove interrupt stack table usage from x86_64 kernel Avi Kivity
2008-12-28 19:08 ` Andi Kleen
2008-12-28 19:07 ` Avi Kivity
2008-12-28 19:19 ` Avi Kivity
2008-12-28 20:08 ` Avi Kivity
2008-12-28 20:34 ` Andi Kleen
2008-12-28 20:28 ` Avi Kivity
2008-12-28 19:30 ` Andi Kleen
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