From mboxrd@z Thu Jan 1 00:00:00 1970 From: Russell King - ARM Linux Subject: Re: [PATCH 5/5] ARM: smp: Skip secondary cpu calibration to speed-up boot Date: Mon, 24 Jan 2011 10:30:43 +0000 Message-ID: <20110124103043.GB18459@n2100.arm.linux.org.uk> References: <1295859080-15259-1-git-send-email-santosh.shilimkar@ti.com> <1295859080-15259-6-git-send-email-santosh.shilimkar@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from caramon.arm.linux.org.uk ([78.32.30.218]:51062 "EHLO caramon.arm.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751314Ab1AXKaz (ORCPT ); Mon, 24 Jan 2011 05:30:55 -0500 Content-Disposition: inline In-Reply-To: <1295859080-15259-6-git-send-email-santosh.shilimkar@ti.com> Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: Santosh Shilimkar Cc: linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org, ccross@android.com, catalin.marinas@arm.com, linus.ml.walleij@gmail.com On Mon, Jan 24, 2011 at 02:21:19PM +0530, Santosh Shilimkar wrote: > On some architectures, secondary cores shares clock with primiary > core and hence scale together. Hence secondary core lpj calibration > is not necessary and can be skipped to save considerable time. > > This can speed up the secondary cpu boot and hotplug cpu online > paths. I still point out that this will be a user visible change in /proc/cpuinfo. From mboxrd@z Thu Jan 1 00:00:00 1970 From: linux@arm.linux.org.uk (Russell King - ARM Linux) Date: Mon, 24 Jan 2011 10:30:43 +0000 Subject: [PATCH 5/5] ARM: smp: Skip secondary cpu calibration to speed-up boot In-Reply-To: <1295859080-15259-6-git-send-email-santosh.shilimkar@ti.com> References: <1295859080-15259-1-git-send-email-santosh.shilimkar@ti.com> <1295859080-15259-6-git-send-email-santosh.shilimkar@ti.com> Message-ID: <20110124103043.GB18459@n2100.arm.linux.org.uk> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Mon, Jan 24, 2011 at 02:21:19PM +0530, Santosh Shilimkar wrote: > On some architectures, secondary cores shares clock with primiary > core and hence scale together. Hence secondary core lpj calibration > is not necessary and can be skipped to save considerable time. > > This can speed up the secondary cpu boot and hotplug cpu online > paths. I still point out that this will be a user visible change in /proc/cpuinfo.