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Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Matthew Wilcox , Christoph Hellwig , Yosry Ahmed , Chengming Zhou , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 3/6] mm/page_io: use swap entries directly in zeromap helpers Message-ID: References: <20260806-b4-page_io-folios-v1-0-0899bac3b826@columbia.edu> <20260806-b4-page_io-folios-v1-3-0899bac3b826@columbia.edu> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260806-b4-page_io-folios-v1-3-0899bac3b826@columbia.edu> On Thu, Aug 06, 2026 at 06:55:35PM -0400, Tal Zussman wrote: > Increment swp_entry_t::val directly instead of recomputing each entry > with page_swap_entry(). This removes the last struct page usage in > page_io.c and saves one call to compound_head() per page. > > Signed-off-by: Tal Zussman ...plus that unholy dance in folio_page_idx() for every +1. Acked-by: Johannes Weiner