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bh=KnPUfGz5HCEPrHdpxix6s8phXI5/yxsCHOSTi1sP9XY=; b=ScYfqAMnYwtJHz463Q1pp3iTre4db8Kod/U6A90QIpn2MI5ir900vZKUm4pPqkJddq883+ +l6/uLUvD3oRi4GL32YOJzqE3724lQeOdU4BeweUukOOE+4/RER7vGw9SSMi1W6I0YKKbc kbX5Hx6YbKm5k14Sd4SAP1OUo8eAsXWhAhuU++4ZvQ3cbyl24rtXHBzHNaErr73Xupfc0o +R/b1bc3rgy0RK9hcEFy3QQ/U6VzCCyNQaTDu4F8Vy4S9V2kS1FQPP+Knp4HnOZgLs4R8R kDdpnxdqO8w9mxrT8GsBWZL/StPpu61gP5TI0kvGc8/9lixh5yQFVWIAg/aJ+Q== From: "Pankaj Raghav (Samsung)" To: willy@infradead.org Cc: akpm@linux-foundation.org, hare@suse.com, hughd@google.com, kirill.shutemov@linux.intel.com, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, mcgrof@kernel.org, slava@dubeyko.com, p.raghav@samsung.com, gost.dev@samsung.com Subject: Re: [PATCH] mm: Support order-1 folios in the page cache Date: Mon, 5 Feb 2024 13:00:39 +0100 Message-ID: <20240205120039.4053661-1-kernel@pankajraghav.com> In-Reply-To: <20231206204442.771430-1-willy@infradead.org> References: <20231206204442.771430-1-willy@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 055FF4002A X-Rspam-User: X-Rspamd-Server: rspam02 X-Stat-Signature: uypnxs6dbna9atgxkm3497rinhusijj7 X-HE-Tag: 1707134450-848366 X-HE-Meta: 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 nFhCHYc9 I1zviPuOTGaRZ+yZUsbSF/blIynAdFh6IvXOB9M01oFErXMe9wBWfpf2jmenX8QFx7bdbyr7bLH1fX5un7a/VfAUpDWnAISZ2JTpK8DtrGJpH6Uv0N+SHoBn34O6ywo161b7CG7oU3vlHUQ+jZoStNsQHFMwEmIsa5jttXG/4dxY8rMIT6mBIZBFw7WFnXto9x9gngM+EMIOvfFi0ea4iiXF/zYJRkwohyuPb0zuUSUdd3aQHFbsFsGjdJiHrsYfN2qpnUTv4Q8sAAW2/4rVmZwVCDv6UeQqFkIh0GcIhqHvz2VBuekNUBH1cnHcrML6dCRR2WVURyrEMDkE= 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: > Folios of order 1 have no space to store the deferred list. This is > not a problem for the page cache as file-backed folios are never > placed on the deferred list. All we need to do is prevent the core > MM from touching the deferred list for order 1 folios and remove the > code which prevented us from allocating order 1 folios. I rebased this patch on top of the lbs tree[1] and ran 3 xfstests loop with 8k XFS blocksize on a 4k PAGE_SIZE machine. The tests ran fine and nothing stood out apart from some known failures. Are you planning to send a new version of this patch (there are some conflicts with the latest baseline)? I can also add it along with the LBS minorder series that I will be sending out in a week or so, if you are busy. -- Pankaj [1] https://github.com/Panky-codes/linux/commits/large-block-minorder-6.8.0-rc2-v1-8k/