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Tue, 08 Jun 2021 10:48:52 +0000 Subject: Re: [RFC 07/26] mm, slub: return slab page from get_partial() and set c->page afterwards To: Christoph Lameter Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, David Rientjes , Pekka Enberg , Joonsoo Kim , Sebastian Andrzej Siewior , Thomas Gleixner , Mel Gorman , Jesper Dangaard Brouer , Peter Zijlstra , Jann Horn References: <20210524233946.20352-1-vbabka@suse.cz> <20210524233946.20352-8-vbabka@suse.cz> From: Vlastimil Babka Message-ID: Date: Tue, 8 Jun 2021 12:48:52 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.10.2 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Authentication-Results: imf24.hostedemail.com; dkim=pass header.d=suse.cz header.s=susede2_rsa header.b=zLyORY0J; dkim=pass header.d=suse.cz header.s=susede2_ed25519 header.b=daeq+qAp; dkim=pass header.d=suse.cz header.s=susede2_rsa header.b=zLyORY0J; dkim=pass header.d=suse.cz header.s=susede2_ed25519 header.b=daeq+qAp; spf=pass (imf24.hostedemail.com: domain of vbabka@suse.cz designates 195.135.220.28 as permitted sender) smtp.mailfrom=vbabka@suse.cz; dmarc=none X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: BD13BA000259 X-Stat-Signature: ukzoztqsusfzufx1w4tggow688fjbp55 X-HE-Tag: 1623149330-391231 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: On 5/25/21 11:12 AM, Christoph Lameter wrote: > On Tue, 25 May 2021, Vlastimil Babka wrote: > >> The function get_partial() finds a suitable page on a partial list, acquires >> and returns its freelist and assigns the page pointer to kmem_cache_node. > in kmem_cache_cpu ?? > >> In later patch we will need more control over the kmem_cache_node assignment, > > kmem_cache_cpu? > >> so instead return the page pointer to get_partial()'s caller and assign it >> there. No functional change as all of this still happens with disabled irq. > > Instead of passing a kmem_cache_cpu pointer pass a pointer to a pointer to > a page .... You're right, confused the two structures here. Fixed, thanks.