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Wed, 12 Jun 2024 09:02:19 +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 L20dGBtkaWaVZgAAD6G6ig (envelope-from ); Wed, 12 Jun 2024 09:02:19 +0000 Message-ID: <5a6335a6-80b8-4874-b526-a88269f8879f@suse.de> Date: Wed, 12 Jun 2024 11:02:19 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v7 05/11] mm: split a folio in minimum folio order chunks To: "Pankaj Raghav (Samsung)" , david@fromorbit.com, djwong@kernel.org, chandan.babu@oracle.com, brauner@kernel.org, akpm@linux-foundation.org, willy@infradead.org Cc: mcgrof@kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, yang@os.amperecomputing.com, Zi Yan , linux-xfs@vger.kernel.org, p.raghav@samsung.com, linux-fsdevel@vger.kernel.org, hch@lst.de, gost.dev@samsung.com, cl@os.amperecomputing.com, john.g.garry@oracle.com References: <20240607145902.1137853-1-kernel@pankajraghav.com> <20240607145902.1137853-6-kernel@pankajraghav.com> Content-Language: en-US From: Hannes Reinecke In-Reply-To: <20240607145902.1137853-6-kernel@pankajraghav.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Rspamd-Action: no action X-Rspam-User: X-Rspamd-Queue-Id: 0BFCD20016 X-Rspamd-Server: rspam01 X-Stat-Signature: jzgzz3m9ufnwrnfkxazko8mtfhmng8es X-HE-Tag: 1718182940-599348 X-HE-Meta: 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 4uj4jtC5 FuqtVB/0BIMvoL2hPZeUUOcm0MyiEeZlfqdCLGToRJr18RBmJ2G0B1kDWOiDAGOg/gaMkEiBeb/zq9o+5g8fJ6ZW7m8vlgqzTEhPOTxjvWs9D8ZdiAQ9nV29gFi04k3ojdb8G6IuHmptBi/806vwl1tsBhOh5FLIGviXZiUXy8yT7L6ItPl/rKd5J93OLIqpozMGz0OyYKH5ZPQIIV0KfBe4gRb9gkh4lAWC20gxP5LiThUtSsqpkZuyqbu+SGGLOQcL4teuTZNjtO6zyUYADAgOhYV2xFQXyWkq4P1Xmxfoi8f+kMfSSk4L9n4ESINN67jyAN04TaQMSfeCoYrIr2zo08cvsQFFkaxJAY8FrnUSnGAfA8Yi6aT6aG2BbzzO75O7dEEt9jsEqzBw= 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 6/7/24 16:58, Pankaj Raghav (Samsung) wrote: > From: Luis Chamberlain > > split_folio() and split_folio_to_list() assume order 0, to support > minorder for non-anonymous folios, we must expand these to check the > folio mapping order and use that. > > Set new_order to be at least minimum folio order if it is set in > split_huge_page_to_list() so that we can maintain minimum folio order > requirement in the page cache. > > Update the debugfs write files used for testing to ensure the order > is respected as well. We simply enforce the min order when a file > mapping is used. > > Signed-off-by: Luis Chamberlain > Signed-off-by: Pankaj Raghav > --- > include/linux/huge_mm.h | 14 ++++++++--- > mm/huge_memory.c | 55 ++++++++++++++++++++++++++++++++++++++--- > 2 files changed, 61 insertions(+), 8 deletions(-) > Reviewed-by: Hannes Reinecke Cheers, Hannes -- Dr. Hannes Reinecke Kernel Storage Architect hare@suse.de +49 911 74053 688 SUSE Software Solutions GmbH, Frankenstr. 146, 90461 Nürnberg HRB 36809 (AG Nürnberg), GF: I. Totev, A. McDonald, W. Knoblich