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Fri, 02 Feb 2024 11:15:12 -0800 (PST) MIME-Version: 1.0 References: <20240201193014.2785570-1-tatashin@google.com> <02610629-05ef-4956-a122-36b6ac98fbc2@arm.com> <84c7e816-f749-48d8-a429-8b0ef799cdbb@arm.com> In-Reply-To: From: Pasha Tatashin Date: Fri, 2 Feb 2024 14:14:35 -0500 Message-ID: Subject: Re: [PATCH] iommu/iova: use named kmem_cache for iova magazines To: Robin Murphy Cc: joro@8bytes.org, will@kernel.org, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org, rientjes@google.com Content-Type: text/plain; charset="UTF-8" X-Rspam-User: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: EEB604001B X-Stat-Signature: ufk7bjpwmok4qxdsrupn4rzxiqwfrb45 X-HE-Tag: 1706901312-207061 X-HE-Meta: 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 c5Y3Dg24 +7M2RnHuTL0Sz14V9VBClcpj7pIZcO/4caKP4S/MY0d7rsMk6vikY4v1hnNRVSB/L3JaKHO5CUP7gIekPpbJG2e9D+iWSJ0HXd79yrJGIVOsEh9XTJSxyceOiat4tTzyF2Bz929pp3x/DYmQK+XdiAjh+AW+X3/nQqxJoOyOvxsmLev9E6QHdwmzFWwe03UP2AKB63D4H0kX3znw= X-Bogosity: Ham, tests=bogofilter, spamicity=0.001524, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: > Yikes, so it really does just have that many IOMMU groups? OK, fair > enough, call me convinced :) > > On balance though, I think I'd prefer to just stick the lifecycle > management into iova_cache_{get,put} for simplicity - spending ~256 > bytes on another kmem_cache we might not use can hardly be significantly > more than the extra code and static data necessary to track its usage > separately anyway. Sure, I will send a v2 soon. Pasha