From: Anders H Kaseorg <andersk@MIT.EDU>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] x86_64: Patch paravirt inline replacements when loading modules
Date: Sat, 28 Jun 2008 18:45:29 -0400 (EDT) [thread overview]
Message-ID: <alpine.DEB.1.10.0806281836020.31023@vinegar-pot.mit.edu> (raw)
In-Reply-To: <4866BBC0.3000503@zytor.com>
On Sat, 28 Jun 2008, H. Peter Anvin wrote:
> Not having looked at this in detail, is this a *current* problem or a
> *future* problem, i.e. does it fix a bug that's currently in the kernel?
It's a current problem. The current situation is that .parainstructions
are patched into the kernel core and modules on i386, but only the kernel
core on x86_64. This results in a slight performance regression in x86_64
modules, compared to the situation before .parainstructions existed. My
patch restores full performance of x86_64 modules.
Anders
next prev parent reply other threads:[~2008-06-28 22:46 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-28 22:25 Anders H Kaseorg
2008-06-28 22:31 ` H. Peter Anvin
2008-06-28 22:45 ` Anders H Kaseorg [this message]
2008-06-28 23:15 ` H. Peter Anvin
2008-06-30 10:15 ` Ingo Molnar
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