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Peter Anvin" , linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, Ingo Molnar , Thomas Gleixner , Will Deacon , x86@kernel.org References: <20200413125303.423864-1-npiggin@gmail.com> <20200413125303.423864-5-npiggin@gmail.com> <20200414072316.GA5503@infradead.org> <1586864403.0qfilei2ft.astroid@bobo.none> <20200414130203.GA20867@infradead.org> In-Reply-To: <20200414130203.GA20867@infradead.org> MIME-Version: 1.0 Message-Id: <1586875675.f8q1grbltc.astroid@bobo.none> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Excerpts from Christoph Hellwig's message of April 14, 2020 11:02 pm: > On Tue, Apr 14, 2020 at 10:13:44PM +1000, Nicholas Piggin wrote: >> Which case? Usually the answer would be because you don't want to use >> contiguous physical memory and/or you don't want to use the linear=20 >> mapping. >=20 > But with huge pages you do by definition already use large contiguous > areas. So you want allocations larger than "small" huge pages but not > using gigantic pages using vmalloc? Yes. Thanks, Nick