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[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> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" X-Stat-Signature: uj41fw3dfkq5ijphw9cup98ddjrpt4ox X-Rspam-User: X-Rspamd-Queue-Id: E4FE5140003 X-Rspamd-Server: rspam06 X-HE-Tag: 1680494655-422169 X-HE-Meta: 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 +tWtrDIa 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000011, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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