From: Andi Kleen <ak@muc.de>
To: Ashok Raj <ashok.raj@intel.com>
Cc: linux-kernel@vger.kernel.org, akpm@osdl.org, discuss@x86-64.org
Subject: Re: Dont use shortcut when using send_IPI_all in flat mode
Date: 22 Sep 2005 11:44:19 +0200
Date: Thu, 22 Sep 2005 11:44:19 +0200 [thread overview]
Message-ID: <20050922094419.GA79762@muc.de> (raw)
In-Reply-To: <20050921135215.A14439@unix-os.sc.intel.com>
On Wed, Sep 21, 2005 at 01:52:16PM -0700, Ashok Raj wrote:
> Hi
>
> This got missed during the previous update for not doing shortcut
> since it introduces race in IPI, when using flat mode.
>
> The earlier patches addressed send_IPI_allbutself, this one
> take care of the sendall() case as well.
>
> Andrew: Please consider for -mm
It's not needed because genapic always sets physflat when
CONFIG_HOTPLUG_CPU is set.
In fact the other HOTPLUG_CPU ifdefs in genapic_flat you added
can be removed now.
-Andi
prev parent reply other threads:[~2005-09-22 9:44 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-21 20:52 Dont use shortcut when using send_IPI_all in flat mode Ashok Raj
2005-09-22 9:44 ` Andi Kleen [this message]
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