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Wong" , mcgrof@kernel.org, gost.dev@samsung.com, hch@lst.de, Pankaj Raghav Subject: Re: [PATCH v3 0/5] add persistent huge zero folio support Message-ID: References: <20250811084113.647267-1-kernel@pankajraghav.com> <112b4bcd-230a-4482-ae2e-67fa22b3596f@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Queue-Id: 6F91840005 X-Stat-Signature: bouz5oiw5pgshhqmd1j3z9fyhryg1zmj X-Rspam-User: X-Rspamd-Server: rspam11 X-HE-Tag: 1754907607-804748 X-HE-Meta: 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 6Gjj+aIT li613Cc8VZuvvNG3o903MHPRNPW1wYdBfhTND1sAhuJ6IZkOIs6G2NdDNfX72JBwtXdp88n1CejpPE/VjW8nvnfaGKYdr33dzHoczAQp/w3/D3/7y/JB2m6zl1bPQxDWKVadzqjqROx+gzKPwgptNF6UfeRORNEJU2gyVZMVOjaMuLxONxlm7xd8L+lfdhkAHghnnIOXkojKDdXRFgEaR/Yphl7CMiYvVDPEsYXOZ4VgKB6m7rQ1mBe20rSgMZ/4rL/86rFFudQvrNOipv8V3Q6zzvAmNLfDvf0vviAVAib5FTwlINglhwIVY0E06dey5fETx4dBrLEXLbXEPEuHP4yh58LCStJWqWewDm1HhYl3P2fsIPrdbOpt4jQ== 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: List-Subscribe: List-Unsubscribe: > > Sorry, RFC v2 I think. It got a bit confusing with series names/versions. > > Well, my worry is that 2M can be a high tax for smaller machines. > Compile-time might be cleaner, but it has downsides. > > It is also not clear if these users actually need physical HZP or virtual > is enough. Virtual is cheap. We do need physical as the main usecase was for block IO where we will be DMAing. The main reason I was seeing an improvement in perf was we were sending bigger chunks of memory in a single bio_vec instead of using multiple bio_vec. -- Pankaj