From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f41.google.com (mail-wm1-f41.google.com [209.85.128.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4301E7C for ; Mon, 3 Apr 2023 04:04:16 +0000 (UTC) Received: by mail-wm1-f41.google.com with SMTP id v20-20020a05600c471400b003ed8826253aso6371434wmo.0 for ; Sun, 02 Apr 2023 21:04:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; t=1680494654; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=dfpcCyJlBWrQogdsMi05FfYrfZ2wEfN0si9pF5mmMEo=; b=oN9vYChtrdLr6qfCCWuW5oLYxj0PGkE2qXn3Y35L0hH2MHGG2Vwe/tbq1lpBe/Xy6k TaaAdfp0xNENIfGPcTRpM7OVjbx2oHh/yFgBGdf+9rOQTzFCNT+YhAGOUy7J7MWRkgk+ kcCZP/Du3jWWGykZfag67wmizfbzOq9XN/ZpuV9KoObb2BJiQANwBuhKrb4h/aNTYz0G y546vvfl59yhr/dnGewZxUk8+NWpTIajQfV2/cD9fT0Zg30Pv4TfSbXHNDWshzsqFnkN 0p06vdRAu/MJR4ZNUfBK/QsMw4Fb4SA/RqL+jW1nFDPqA2aAHDrRAQoiiBu5ibYu/mpc zAhQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1680494654; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=dfpcCyJlBWrQogdsMi05FfYrfZ2wEfN0si9pF5mmMEo=; b=qDmnIPAjWuQiDkzLucq3o1zRk5QrZM97PftXkD0QbejMcBlZ8vYH8nF7474NMCNtGX R674KSBUY1ltaxrIcahs+OBvOYMsvk+PNBBi8deIqNUfUvUkCRwJ50ICw8FYrk/GCyEA yuFT5EdVot4oh5VtBKiOaIDyCmhKh4TagwVA4s+AWW5wnZi84js9+y5rX459rz0PUwoz 8cpMJFS+UrQQlTJGWuu3NrUAqA3hQx27s+pD0LkFtJ/9SSP4LjIFJPftldYTpiwFVe3m hmKVlb9enzXqb25+RL+SD/NSTa5LCbXg2my+s+5nk+LGF7zSs7czqt4ME1JX1OB2QVlb Rpzg== X-Gm-Message-State: AO0yUKX3xror3VDEcgC2dRAQgjeQ4Le6AabH6t+5xvj+PGKVnvEDTAUX QsJQpOUZz9tfFvcfxUTjFlpRf1cWfPo= X-Google-Smtp-Source: AK7set/nuMZskSO45lzGuF2YA589VfMcTt3xCFkljUrgjlBp1p0kQt63kTk+o+vX/k1vreZicE6aig== X-Received: by 2002:a7b:ce0a:0:b0:3ed:237f:3da with SMTP id m10-20020a7bce0a000000b003ed237f03damr27017095wmc.22.1680494654247; Sun, 02 Apr 2023 21:04:14 -0700 (PDT) Received: from suse.localnet (a-pi8-84.tin.it. [212.216.222.51]) by smtp.gmail.com with ESMTPSA id u25-20020a7bc059000000b003ede06f3178sm10696915wmc.31.2023.04.02.21.04.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 02 Apr 2023 21:04:13 -0700 (PDT) From: "Fabio M. De Francesco" To: Matthew Wilcox Cc: =?utf-8?B?6YOt6L6J?= , Vlastimil Babka , Linux-MM , LKML , patches@lists.linux.dev Subject: Re: [PATCH] mm: remove all the slab allocators Date: Mon, 03 Apr 2023 06:04:12 +0200 Message-ID: <3566797.hdfAi7Kttb@suse> In-Reply-To: References: <20230401094658.11146-1-vbabka@suse.cz> Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" On luned=C3=AC 3 aprile 2023 05:51:42 CEST Fabio M. De Francesco wrote: > On Sun, 2 Apr 2023, 13:04 Matthew Wilcox, wrote: > > On Sun, Apr 02, 2023 at 05:09:14PM +0800, =E9=83=AD=E8=BE=89 wrote: > > > On 4/1/23 5:46 PM, Vlastimil Babka wrote: > > > > As the SLOB removal is on track and the SLAB removal is planned, I= =20 have > > > > realized - why should we stop there and not remove also SLUB? What'= s a > > > > slab allocator good for in 2023? The RAM sizes are getting larger a= nd > > > > the modules cheaper [1]. The object constructor trick was perhaps > > > > interesting in 1994, but not with contemporary CPUs. So all the slab > > > > allocator does today is just adding an unnecessary layer of complex= ity > > > > over the page allocator. > > >=20 > > > The slab allocator is very core and very important to the Linux kerne= l. > > > After the patch is merged into the mainline, it will have a very=20 profound > > > impact on the development of the Linux kernel. > >=20 > > https://en.wikipedia.org/wiki/April_Fools%27_Day >=20 > Wow! >=20 > The most interesting implication of this "patch" is that you noticed that > some people may actually need the link above to be able to distinguish > between foolishness and reality... >=20 > Thanks :-) >=20 > Fabio Ah, I was so shocked that didn't realize was responding with the GMail app= =20 from the tablet... :-) =46abio