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Received: from willy by casper.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1uShhk-0000000DV6o-3QPz; Fri, 20 Jun 2025 19:47:17 +0000 Date: Fri, 20 Jun 2025 20:47:16 +0100 From: Matthew Wilcox To: Vitaly Wool Cc: linux-mm@kvack.org, akpm@linux-foundation.org, linux-kernel@vger.kernel.org, Igor Belousov Subject: Re: [PATCH] mm/zswap: export zswap API to modules Message-ID: References: <20250620193552.2772125-1-vitaly.wool@konsulko.se> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250620193552.2772125-1-vitaly.wool@konsulko.se> X-Stat-Signature: jumgumuj3x1p8pt4bu7nb6ikc6m75ahr X-Rspamd-Queue-Id: 6E091C000B X-Rspam-User: X-Rspamd-Server: rspam06 X-HE-Tag: 1750448841-389064 X-HE-Meta: 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 rDY4kR8Z sp4KPkQpCqz7H/nhd28qVDZNdAtYeXzAU862207mxQvgbB7nwj9kLeWvim3YET3L5+ClgevKOU5O2E9lQrDmePpAVjEx5EFmzEaRp2mV6+fTXcO9QhyyHFvyuNHEFe4Qu8yCL5GT0sA4v3//Pg6cY+Q5o38OYEAYXvmgZMvvJZ97INTjPFa5jdN5KdgdxL4APm01sjHo0dUQ5VLtde+T55nMFGJJht64RF80H 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 Fri, Jun 20, 2025 at 09:35:52PM +0200, Vitaly Wool wrote: > There is no reason to not let modules use zswap capabilies to > densely store unused pages in RAM. This will allow to remove some > homebrew solutions for e.g. GPU drivers in favor of plainly using > zswap pool. I really think these should be _GPL exports. And I'm not sure why the GPU drivers are using "homebrew solutions" instead of using the shmem APIs which work whether zswap is configured in or not.