From mboxrd@z Thu Jan 1 00:00:00 1970 From: pasha.tatashin@oracle.com (Pasha Tatashin) Date: Tue, 3 Oct 2017 11:34:25 -0400 Subject: [PATCH v9 12/12] mm: stop zeroing memory during allocation in vmemmap In-Reply-To: <20171003131952.aqq377pjug5me6go@dhcp22.suse.cz> References: <20170920201714.19817-1-pasha.tatashin@oracle.com> <20170920201714.19817-13-pasha.tatashin@oracle.com> <20171003131952.aqq377pjug5me6go@dhcp22.suse.cz> Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 10/03/2017 09:19 AM, Michal Hocko wrote: > On Wed 20-09-17 16:17:14, Pavel Tatashin wrote: >> vmemmap_alloc_block() will no longer zero the block, so zero memory >> at its call sites for everything except struct pages. Struct page memory >> is zero'd by struct page initialization. >> >> Replace allocators in sprase-vmemmap to use the non-zeroing version. So, >> we will get the performance improvement by zeroing the memory in parallel >> when struct pages are zeroed. > > Is it possible to merge this patch with http://lkml.kernel.org/r/20170920201714.19817-7-pasha.tatashin at oracle.com Yes, I will do that. It would also require re-arranging [PATCH v9 07/12] sparc64: optimized struct page zeroing optimization to come after this patch. Pasha