From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Wilcox Date: Tue, 18 Nov 2008 07:12:55 +0000 Subject: Re: [PATCH] Ensure PSR.ac is cleared for early userspace Message-Id: <20081118071255.GN1617@parisc-linux.org> List-Id: References: <200811120135.mAC1ZoSd017352@agluck-lia64.sc.intel.com> In-Reply-To: <200811120135.mAC1ZoSd017352@agluck-lia64.sc.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org On Tue, Nov 18, 2008 at 08:06:53AM +0100, Petr Tesarik wrote: > Well, then let's make it a boot option (or a sysctl). The default must > be psr.ac = 1, but if the admin sees "unaligned access" messages and > knows that there is no way of getting a (timely) fix for that particular > production system, s/he should be able to turn them off. Or how about ia64 does what every other Linux port does and turn off alignment warnings altogether? Are they *particularly* expensive on Itanium? I bet they aren't. -- Matthew Wilcox Intel Open Source Technology Centre "Bill, look, we understand that you're interested in selling us this operating system, but compare it to ours. We can't possibly take such a retrograde step."