From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ian Wienand Date: Tue, 23 Sep 2003 23:04:12 +0000 Subject: Re: NS83820 2.6.0-test5 driver seems unstable on IA64 Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org On Tue, Sep 23, 2003 at 10:27:35AM -0700, David S. Miller wrote: > As I understand it, you even do this stupid printk for user apps > as well, that makes it more than rediculious. Just as a point of interest, as an application programmer I think it's the type of thing you want to know about quite loudly. The only benchmark style figure on this I've ever seen is in this paper http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dv_vstechart/html/vcconWindowsDataAlignmentOnIPFX86X86-64.asp (forgive the long url) which, if you scroll down to the little graph, shows OS fixup is about 450 times slower that an aligned access. That sucks, and if I didn't realise I'd done it, it would suck even more. Oh, and I think fixing it up automatically & warning is much more useful than sending a (by default) terminating signal to the program; though I'm sure others might disagree. -i ianw@gelato.unsw.edu.au http://www.gelato.unsw.edu.au