From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 63437224DF for ; Tue, 14 Nov 2023 11:18:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=suse.com header.i=@suse.com header.b="W7QLIXbC" Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.220.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 358FA12C; Tue, 14 Nov 2023 03:18:43 -0800 (PST) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id CC6E621898; Tue, 14 Nov 2023 11:18:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1699960721; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=siI4v49ul10sLUO0tQMqvHE05UpMxGy63FAFDTFOHMw=; b=W7QLIXbC3gZQoK3/1WsClhrdvkrB7hbMm2lAIMx3zE1aWvZea2b4DbcFV47m1CUj7x0kRw 9O7aBh/1Ja0upqq+lfJRVjoUBg6ZijVtbw5tEkvQv8pNXk9FfqkNYHSAVcFtSztqpkCa6w aJtmisjCXgWHQnNU/nEDUSKTF+bZjhQ= Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id A6B2013460; Tue, 14 Nov 2023 11:18:41 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id V97lJZFXU2WyRgAAMHmgww (envelope-from ); Tue, 14 Nov 2023 11:18:41 +0000 Date: Tue, 14 Nov 2023 12:18:40 +0100 From: Michal Hocko To: Vlastimil Babka Cc: David Rientjes , Christoph Lameter , Pekka Enberg , Joonsoo Kim , Andrew Morton , Hyeonggon Yoo <42.hyeyoo@gmail.com>, Roman Gushchin , linux-mm@kvack.org, linux-kernel@vger.kernel.org, patches@lists.linux.dev, Andrey Ryabinin , Alexander Potapenko , Andrey Konovalov , Dmitry Vyukov , Vincenzo Frascino , Marco Elver , Johannes Weiner , Shakeel Butt , Muchun Song , Kees Cook , kasan-dev@googlegroups.com, cgroups@vger.kernel.org Subject: Re: [PATCH 00/20] remove the SLAB allocator Message-ID: References: <20231113191340.17482-22-vbabka@suse.cz> Precedence: bulk X-Mailing-List: cgroups@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20231113191340.17482-22-vbabka@suse.cz> Authentication-Results: smtp-out1.suse.de; none X-Spam-Level: X-Spam-Score: -3.43 X-Spamd-Result: default: False [-3.43 / 50.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; RCVD_TLS_ALL(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; TO_MATCH_ENVRCPT_ALL(0.00)[]; TAGGED_RCPT(0.00)[]; MIME_GOOD(-0.10)[text/plain]; NEURAL_HAM_LONG(-3.00)[-1.000]; BAYES_HAM(-1.33)[90.32%]; DKIM_SIGNED(0.00)[suse.com:s=susede1]; NEURAL_HAM_SHORT(-1.00)[-1.000]; RCPT_COUNT_TWELVE(0.00)[23]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; MID_RHS_NOT_FQDN(0.50)[]; FREEMAIL_CC(0.00)[google.com,linux.com,kernel.org,lge.com,linux-foundation.org,gmail.com,linux.dev,kvack.org,vger.kernel.org,lists.linux.dev,arm.com,cmpxchg.org,chromium.org,googlegroups.com]; RCVD_COUNT_TWO(0.00)[2]; SUSPICIOUS_RECIPS(1.50)[] On Mon 13-11-23 20:13:41, Vlastimil Babka wrote: > The SLAB allocator has been deprecated since 6.5 and nobody has objected > so far. As we agreed at LSF/MM, we should wait with the removal until > the next LTS kernel is released. AFAIK that version hasn't been > announced yet, but assuming it would be 6.7, we can aim for 6.8 and > start exposing the removal to linux-next during the 6.7 cycle. Makes sense to me. [...] > 27 files changed, 784 insertions(+), 5122 deletions(-) This is just too much of a maintenance burden to have a comfort of multiple low level allocators. So it is good to see it go. Not that I would have anything against SLAB allocator as such but if we need to choose SLUB seems like a better choice. Thanks for all the work! -- Michal Hocko SUSE Labs