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From: Yosry Ahmed To: Sergey Senozhatsky Cc: Andrew Morton , Minchan Kim , Johannes Weiner , Nhat Pham , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [RFC PATCH 5/6] zsmalloc: introduce handle mapping API Message-ID: References: <20250127080254.1302026-1-senozhatsky@chromium.org> <20250127080254.1302026-6-senozhatsky@chromium.org> <5nhnrq753euz3exuirvkpvq5ycrpik7er6mgpu66zp2emt5xf4@7n2vzbghlzmd> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5nhnrq753euz3exuirvkpvq5ycrpik7er6mgpu66zp2emt5xf4@7n2vzbghlzmd> X-Migadu-Flow: FLOW_OUT X-Rspamd-Queue-Id: B00241C000B X-Rspam-User: X-Rspamd-Server: rspam11 X-Stat-Signature: sew7xmfbxx7cqfswpoa9zu6ug5mgbw3y X-HE-Tag: 1738084955-76780 X-HE-Meta: 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 P9NeIr6p rxUUdTX9osOrA7e/9E49r36fpPsBzj2dlZIc0qXWWX3qCdvi7uruMMeXMNGSHr08/wHBctivmfJybHrrwhoLjAebxFkZVZx8LMD1WmY4q/DX1BXUggJHmClOSCf3tcO5yJJ/iUWPoa75C8N5KEE1bpe4ZVQvIJVG/v/+keWVztyQHbkfroLwfvH3PszHTZ1hBD557gF5htNSj9efCFniZeV9cXpyixR7sG1zAARSCK/P9Vo8= 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 Tue, Jan 28, 2025 at 08:10:10PM +0900, Sergey Senozhatsky wrote: > On (25/01/28 14:29), Sergey Senozhatsky wrote: > > Maybe we can teach compaction and migration to try-WRITE and > > bail out if the page is locked, but I don't know. > > This seems to be working just fine. Does this mean we won't need as much locking changes to get zsmalloc to be preemtible? I am slightly worried about how these changes will affect performance tbh.