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b=Icc+yBF9iEVdOQHGaudcVAk6tV3qCNsbT0le0OrwwXdZU08uJYz7xYtx1+xYruhqY wTH0BvMUge2wcxp629t8T8+GJV+LzNFJi6Q8UP7vD2eBQmFUgIgqfzT4QMi1v5TOeC Y9joDRY5WzKlxyCnvA7R8Ki/8PWRHIVM/w8smzirYVXYlFYPVAkeSlgAMCD6nBDmtG EeoeKRQaiq/UIpIE1rgqqvpQRXs2eCSS3yGK8jCTWEF9UA7+xJFW89QCNOtB7uSQAJ xXgOnIccFtxDO2eJns/mHK5t0/BdLq4+pY3vKwgwsPDmidHQdVRGkT68FQJMnhZmyE geFFOKGjAKkzA== Date: Wed, 20 Nov 2024 11:51:57 -0700 From: Keith Busch To: Christoph Hellwig Cc: Brian Johannesmeyer , Andrew Morton , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org, Raphael Isemann , Cristiano Giuffrida , Herbert Bos , Greg KH Subject: Re: [RFC v2 0/2] dmapool: Mitigate device-controllable mem. corruption Message-ID: References: <20241119205529.3871048-1-bjohannesmeyer@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 4D39040011 X-Stat-Signature: oaj15dbukzptkyzw3dxoih1dwniyghu7 X-Rspam-User: X-HE-Tag: 1732128650-386385 X-HE-Meta: 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 goXJkCQg XNbeHzA+Gb6PQDWBDVsFNJNjH/vZyrHbnr0tMazELGGnZUj3i6jYp4em2rcqIMJkU81dphOLEctZTjQvDzCkbFKxhK1h9Atp7uDfw7lgNPcYccLdXw6hbEfF/Q4/nIN6gSDy0w96heMqCamXOOTG/fZVy6LNnHYNmWgS5zz+R4etuqtk+ZNdRW/06rHzfP/eOMojTaddJ/GLRXB3Vr354p07qbdTOPjtXfz3XfYDFeF6h04Ms3MDR9Azrw3NiVegzUqan 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: On Wed, Nov 20, 2024 at 01:29:19AM -0800, Christoph Hellwig wrote: > On Tue, Nov 19, 2024 at 09:55:27PM +0100, Brian Johannesmeyer wrote: > > **Performance**. I evaluated the patch set's performance by running the > > `DMAPOOL_TEST` test with `DMAPOOL_DEBUG` enabled and with/without the > > patches applied. Here is its output *without* the patches applied: Could you rerun your tests without DMAPOOL_DEBUG enabled? That's the more interesting kernel setup for performance comparisions.