From mboxrd@z Thu Jan 1 00:00:00 1970 From: bgat@billgatliff.com (Bill Gatliff) Date: Fri, 13 Nov 2009 08:00:27 -0600 Subject: ARM: big performance waste in memcpy_{from,to}io In-Reply-To: <20091113122438.GB29008@n2100.arm.linux.org.uk> References: <200911121749.49676.h.feurstein@gmail.com> <200911131232.41716.h.feurstein@gmail.com> <20091113122438.GB29008@n2100.arm.linux.org.uk> Message-ID: <4AFD667B.3020505@billgatliff.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Russell King - ARM Linux wrote: > The problem is whether optimising it will end up breaking existing users. > I say we throw in the optimized version and enable it by default, along with a Kconfig to defeat it upon user request at build time (or maybe a module parameter). And then see who complains. b.g. -- Bill Gatliff bgat at billgatliff.com