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Tue, 14 Apr 2020 05:24:52 -0700 (PDT) Date: Tue, 14 Apr 2020 22:23:11 +1000 From: Nicholas Piggin Subject: Re: [PATCH v2 0/4] huge vmalloc mappings To: David Rientjes References: <20200413125303.423864-1-npiggin@gmail.com> In-Reply-To: MIME-Version: 1.0 Message-Id: <1586866432.g0r7udmtjr.astroid@bobo.none> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200414_052454_024835_69D68FAD X-CRM114-Status: UNSURE ( 8.87 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arch@vger.kernel.org, Will Deacon , Catalin Marinas , x86@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , Thomas Gleixner , linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Excerpts from David Rientjes's message of April 14, 2020 10:27 am: > On Mon, 13 Apr 2020, Nicholas Piggin wrote: > >> We can get a significant win with larger mappings for some of the big >> global hashes. >> >> Since RFC, relevant architectures have added p?d_leaf accessors so no >> real arch changes required, and I changed it not to allocate huge >> mappings for modules and a bunch of other fixes. >> > > Hi Nicholas, > > Any performance numbers to share besides the git diff in the last patch in > the series? I'm wondering if anything from mmtests or lkp-tests makes > sense to try? Hey, no I don't have any other tests I've run. Some of the networking hashes do make use of it as well though, and might see a few % in the right kind of workload. There's probably a bunch of other stuff where it could help a little bit, looking through the tree, I just don't have anything specific. Thanks, Nick _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel