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Sun, 11 Feb 2024 20:38:16 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id kmM4DzgwyWVAUAAAD6G6ig (envelope-from ); Sun, 11 Feb 2024 20:38:16 +0000 Date: Sun, 11 Feb 2024 21:39:24 +0100 From: Oscar Salvador To: Marco Elver Cc: Andrew Morton , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Michal Hocko , Vlastimil Babka , Andrey Konovalov , Alexander Potapenko Subject: Re: [PATCH v7 3/4] mm,page_owner: Display all stacks and their count Message-ID: References: <20240208234539.19113-1-osalvador@suse.de> <20240208234539.19113-4-osalvador@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspam-User: X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: A0038100009 X-Stat-Signature: tkfc41iwkxjzr83eczrkr7enjawa6gdc X-HE-Tag: 1707683898-683023 X-HE-Meta: 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 d2c8jiHy ux67cM678wELz5zglytNgzmYh6TkxHwXNFp7VA0pZ+zTf5CpFsbefagjqMteuXxLFM4hFFtGvH3gVFsiqKwD1YvRxv7kYBAJB1dsspLkVNgy3mhE7uBLKXOGD4Yzbs8TSloAVtFmaHr5HN4h65cX6FOAr0r+Qk6XzBwvsY+6ys9UxI74lv3WkxueA2DGvcFE9IGYjbPePlOzDxpRVptZcg4IAW+YPBzw+vinpzdaca3dKHdRb/h9RTjWTjXMxldJoJPNy 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 Sat, Feb 10, 2024 at 08:52:25AM +0100, Marco Elver wrote: > The extra bits are used by KMSAN, and might conflict if enabled at the > same time. I think the safest option is to keep your own list. I think > that will also be more performant if there are other stackdepot users > because you do not have to traverse any of the other entries. Ok, I thought we had spare bits for other users. But thinking about it some more, yes, it makes sense for page_owner to maintain its own list, so traversing it is faster and we do not have to place code to traverse the buckets in stackdepot. -- Oscar Salvador SUSE Labs