From: Rusty Russell <rusty@rustcorp.com.au>
To: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
Andi Kleen <ak@muc.de>, "H. Peter Anvin" <hpa@zytor.com>,
Chuck Ebbert <cebbert@redhat.com>,
Christoph Hellwig <hch@infradead.org>,
Jeremy Fitzhardinge <jeremy@goop.org>
Subject: Re: [patch 5/8] Immediate Values - x86 Optimization
Date: Thu, 15 Nov 2007 14:08:45 +1100 [thread overview]
Message-ID: <200711151408.46030.rusty@rustcorp.com.au> (raw)
In-Reply-To: <20071113190040.740103668@polymtl.ca>
On Wednesday 14 November 2007 05:58:05 Mathieu Desnoyers wrote:
> x86 optimization of the immediate values which uses a movl with code
> patching to set/unset the value used to populate the register used as
> variable source.
For the record, I think the patching code gross overkill.
A stop_machine (or lightweight variant using IPI) would be sufficient and
vastly simpler. Trying to patch NMI handlers while they're running is
already crazy.
I'd keep this version up your sleeve for they day when it's needed.
Rusty.
next prev parent reply other threads:[~2007-11-15 3:08 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-13 18:58 [patch 0/8] Immediate Values (now with merged x86 support) Mathieu Desnoyers
2007-11-13 18:58 ` [patch 1/8] Immediate Values - Architecture Independent Code Mathieu Desnoyers
2007-11-13 18:58 ` [patch 2/8] Immediate Values - Kconfig menu in EMBEDDED Mathieu Desnoyers
2007-11-13 18:58 ` [patch 3/8] Immediate Values - Move Kprobes x86 restore_interrupt to kdebug.h Mathieu Desnoyers
2007-11-13 18:58 ` [patch 4/8] Add asm-compat.h to x86 Mathieu Desnoyers
2007-11-13 19:05 ` H. Peter Anvin
2007-11-13 20:37 ` [patch 4/8] Add asm-compat.h to x86 -> use new asm.h instead Mathieu Desnoyers
2007-11-13 18:58 ` [patch 5/8] Immediate Values - x86 Optimization Mathieu Desnoyers
2007-11-13 19:07 ` H. Peter Anvin
2007-11-13 19:24 ` Mathieu Desnoyers
2007-11-13 19:36 ` H. Peter Anvin
2007-11-13 19:45 ` Mathieu Desnoyers
2007-11-13 19:56 ` H. Peter Anvin
2007-11-13 20:40 ` [patch 5/8] Immediate Values - x86 Optimization (update) Mathieu Desnoyers
2007-11-13 21:26 ` H. Peter Anvin
2007-11-13 22:02 ` Mathieu Desnoyers
2007-11-13 22:35 ` H. Peter Anvin
2007-11-14 0:34 ` Mathieu Desnoyers
2007-11-14 1:02 ` H. Peter Anvin
2007-11-14 1:44 ` [patch 5/8] Immediate Values - x86 Optimization (update 2) Mathieu Desnoyers
2007-11-14 2:58 ` H. Peter Anvin
2007-11-14 14:16 ` Mathieu Desnoyers
2007-11-14 18:52 ` [PATCH] Immediate Values x86 Optimization Declare Discarded Instruction Mathieu Desnoyers
2007-11-14 19:00 ` H. Peter Anvin
2007-11-14 19:16 ` [PATCH] Add __discard section to x86 Mathieu Desnoyers
2007-11-14 19:33 ` H. Peter Anvin
2007-11-15 3:08 ` Rusty Russell [this message]
2007-11-15 4:06 ` [patch 5/8] Immediate Values - x86 Optimization Mathieu Desnoyers
2007-11-15 4:45 ` Rusty Russell
2007-11-15 5:37 ` Mathieu Desnoyers
2007-11-15 11:06 ` Rusty Russell
2007-11-16 14:03 ` [patch 5/8] Immediate Values - x86 Optimization (simplified) Mathieu Desnoyers
2007-11-18 23:11 ` Rusty Russell
2007-11-19 14:28 ` Mathieu Desnoyers
2007-11-19 23:06 ` Rusty Russell
2007-11-20 17:02 ` Mathieu Desnoyers
2007-11-19 19:15 ` Mathieu Desnoyers
2007-11-13 18:58 ` [patch 6/8] Immediate Values - Powerpc Optimization Mathieu Desnoyers
2007-11-13 18:58 ` [patch 7/8] Immediate Values - Documentation Mathieu Desnoyers
2007-11-13 18:58 ` [patch 8/8] Scheduler Profiling - Use Immediate Values Mathieu Desnoyers
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