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Tue, 17 Dec 2024 10:04:23 +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 MbntLqdMYWdMOwAAD6G6ig (envelope-from ); Tue, 17 Dec 2024 10:04:23 +0000 Message-ID: <89b3e0fd-6ff8-4427-b895-a7c63f70723c@suse.de> Date: Tue, 17 Dec 2024 11:04:23 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC v2 04/11] fs/buffer: reduce stack usage on bh_read_iter() To: Luis Chamberlain , willy@infradead.org, hch@lst.de, dave@stgolabs.net, david@fromorbit.com, djwong@kernel.org Cc: john.g.garry@oracle.com, ritesh.list@gmail.com, kbusch@kernel.org, linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org, linux-mm@kvack.org, linux-block@vger.kernel.org, gost.dev@samsung.com, p.raghav@samsung.com, da.gomez@samsung.com, kernel@pankajraghav.com References: <20241214031050.1337920-1-mcgrof@kernel.org> <20241214031050.1337920-5-mcgrof@kernel.org> Content-Language: en-US From: Hannes Reinecke In-Reply-To: <20241214031050.1337920-5-mcgrof@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 5004AA000C X-Rspamd-Server: rspam12 X-Stat-Signature: 3xgmusmroh18nyr76amce69dto7zc64e X-Rspam-User: X-HE-Tag: 1734429844-891748 X-HE-Meta: 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 zaoZV4Pc 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000217, 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 12/14/24 04:10, Luis Chamberlain wrote: > Now that we can read asynchronously buffer heads from a folio in > chunks, we can chop up bh_read_iter() with a smaller array size. > Use an array of 8 to avoid stack growth warnings on systems with > huge base page sizes. > > Signed-off-by: Luis Chamberlain > --- > fs/buffer.c | 18 ++++++++++++------ > 1 file changed, 12 insertions(+), 6 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