From: Jeremy Fitzhardinge <jeremy@goop.org>
To: tim.c.chen@linux.intel.com
Cc: Virtualization Mailing List <virtualization@lists.osdl.org>,
linux-kernel@vger.kernel.org
Subject: Re: system call time increase when turning on CONFIG_PARAVIRT
Date: Wed, 07 Mar 2007 16:55:40 -0800 [thread overview]
Message-ID: <45EF5F0C.5070102@goop.org> (raw)
In-Reply-To: <1173312124.8383.35.camel@localhost.localdomain>
Tim Chen wrote:
> It turned out that VDSO was turned off by CONFIG_PARAVIRT option,
> causing the system call to use inefficient int 0x80 which led to the
> increase system_call time I was seeing. I noted that Ingo has caught
> this problem and proposed a patch to correct this issue in another mail
> thread.
Thanks for identifying this. We'll be posting a more general fix for
COMPAT_VDSO soon which will address this.
J
prev parent reply other threads:[~2007-03-08 0:55 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1172866274.4898.14.camel@localhost.localdomain>
2007-03-02 21:54 ` system call time increase when turning on CONFIG_PARAVIRT Jeremy Fitzhardinge
2007-03-02 23:11 ` Tim Chen
2007-03-03 0:16 ` Jeremy Fitzhardinge
2007-03-03 7:00 ` Zachary Amsden
2007-03-08 0:02 ` Tim Chen
2007-03-08 0:55 ` Jeremy Fitzhardinge [this message]
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