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Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.5.0 Subject: Re: [PATCH 03/12] mm, slub: disable SYSFS support with CONFIG_SLUB_TINY Content-Language: en-US To: Roman Gushchin Cc: Christoph Lameter , David Rientjes , Joonsoo Kim , Pekka Enberg , Hyeonggon Yoo <42.hyeyoo@gmail.com>, Andrew Morton , Linus Torvalds , Matthew Wilcox , patches@lists.linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org References: <20221121171202.22080-1-vbabka@suse.cz> <20221121171202.22080-4-vbabka@suse.cz> From: Vlastimil Babka In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit ARC-Authentication-Results: i=1; imf13.hostedemail.com; dkim=pass header.d=suse.cz header.s=susede2_rsa header.b=rqTkvg4c; dkim=pass header.d=suse.cz header.s=susede2_ed25519 header.b=lMVHKR7Z; spf=pass (imf13.hostedemail.com: domain of vbabka@suse.cz designates 195.135.220.28 as permitted sender) smtp.mailfrom=vbabka@suse.cz; dmarc=none ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; 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dkim=pass header.d=suse.cz header.s=susede2_ed25519 header.b=lMVHKR7Z; spf=pass (imf13.hostedemail.com: domain of vbabka@suse.cz designates 195.135.220.28 as permitted sender) smtp.mailfrom=vbabka@suse.cz; dmarc=none X-Rspamd-Queue-Id: DBC9F2000D X-HE-Tag: 1669280440-969710 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 11/24/22 02:12, Roman Gushchin wrote: > On Mon, Nov 21, 2022 at 06:11:53PM +0100, Vlastimil Babka wrote: >> Currently SLUB enables its sysfs support depending unconditionally on >> the general CONFIG_SYSFS setting. To reduce the configuration >> combination space, make CONFIG_SLUB_TINY disable SLUB's sysfs support by >> reusing the existing SLAB_SUPPORTS_SYSFS define. It is unlikely that >> real tiny systems would combine CONFIG_SLUB_TINY with CONFIG_SYSFS, but >> a randconfig might. > > Hm, don't we want to introduce CONFIG_SLAB_SYSFS instead? > I believe many users don't really need it, even if they don't > need CONFIG_SLUB_TINY and they do have CONFIG_SYSFS. Dunno, adding more and more config options is generally frowned upon. Also tools might be using it to get more details than /proc/slabinfo does - i.e. tools/vm/slabinfo.c > Thanks!