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a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1695131299; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=X9FYlNJCAzHRQI3aFcq+8MStAveBkI/b/TXrkMx0Ahc=; b=ldaJHTWcKyIZqSnoGSIJ+sIG8QCTX6SFa3EExMrLiyz85pzrdsLq01aX7DRHadVG5WW1wU Xr2BPgV7d5W1q0p+V6rxutdh5w8dJfQ+XQLyrSKQ+djlPzjrAYUZTnMEYj42a4lncQACcX BeuWG5vxs4V1NpO6xtfvLfgynFQT3Yw= Received: from inpost2.zedat.fu-berlin.de ([130.133.4.69]) by outpost.zedat.fu-berlin.de (Exim 4.95) with esmtps (TLS1.3) tls TLS_AES_256_GCM_SHA384 (envelope-from ) id 1qib5H-000y1u-E7; Tue, 19 Sep 2023 15:48:11 +0200 Received: from p5b13a40a.dip0.t-ipconnect.de ([91.19.164.10] helo=[192.168.178.81]) by inpost2.zedat.fu-berlin.de (Exim 4.95) with esmtpsa (TLS1.3) tls TLS_AES_256_GCM_SHA384 (envelope-from ) id 1qib5H-001yAy-4e; Tue, 19 Sep 2023 15:48:11 +0200 Message-ID: Subject: Re: Arches that don't support PREEMPT From: John Paul Adrian Glaubitz To: Peter Zijlstra Cc: Matthew Wilcox , Thomas Gleixner , Linus Torvalds , Ankur Arora , linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, akpm@linux-foundation.org, luto@kernel.org, bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, mingo@redhat.com, juri.lelli@redhat.com, vincent.guittot@linaro.org, mgorman@suse.de, rostedt@goodmis.org, jon.grimm@amd.com, bharata@amd.com, raghavendra.kt@amd.com, boris.ostrovsky@oracle.com, konrad.wilk@oracle.com, jgross@suse.com, andrew.cooper3@citrix.com, Geert Uytterhoeven , linux-m68k@lists.linux-m68k.org, Richard Weinberger , Anton Ivanov , Johannes Berg , linux-um@lists.infradead.org, Brian Cain , linux-hexagon@vger.kernel.org, Richard Henderson , Ivan Kokshaysky , Matt Turner , linux-alpha@vger.kernel.org Date: Tue, 19 Sep 2023 15:48:09 +0200 In-Reply-To: <20230919134218.GA39281@noisy.programming.kicks-ass.net> References: <87zg1u1h5t.fsf@oracle.com> <20230911150410.GC9098@noisy.programming.kicks-ass.net> <87h6o01w1a.fsf@oracle.com> <20230912082606.GB35261@noisy.programming.kicks-ass.net> <87cyyfxd4k.ffs@tglx> <87led2wdj0.ffs@tglx> <0e69f7df80dc5878071deb0d80938138d19de1d1.camel@physik.fu-berlin.de> <20230919134218.GA39281@noisy.programming.kicks-ass.net> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.48.4 MIME-Version: 1.0 X-Original-Sender: glaubitz@physik.fu-berlin.de X-Originating-IP: 91.19.164.10 X-ZEDAT-Hint: PO X-Rspam-User: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 3011D100011 X-Stat-Signature: ebcbntcr1fwdwkw5fxhmn8jxsowicdjk X-HE-Tag: 1695131298-690728 X-HE-Meta: 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 Gw1GqJde mmAGPnz7fJSb1C43vCYY2X7R3cHVhQMxMEltFi32Wlbd8ZbQzgRWBLH63Mkuiv6eWNVS/xB5m2hTPiHgdmEQuXXE+muRrWX/ZWrD1X4Bcwy3v6V4o7p2u8rrpfiGaAGOEtc0/Of7dw0iLmESUju01U/+KnHNsweOXG/MD5lVd1GdCmuirMwlphtb+RcHW6AIdJxoCUtH+5nNBqz8Ac/fdxMjrAa55smjUNP6UQBdpLNtKfea0skdZZZBQEscYZ7dEPV0qPcsvbTY2pJ/0qNIwAsZhdllUKfoAvc8vYltr03B8V97ulmO/ux6/B2Hha6D4lelKU1q58eRcTQA= 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 Tue, 2023-09-19 at 15:42 +0200, Peter Zijlstra wrote: > > The agreement to kill off ia64 wasn't an invitation to kill off other s= tuff > > that people are still working on! Can we please not do this? >=20 > If you're working on one of them, then surely it's a simple matter of > working on adding CONFIG_PREEMPT support :-) As Geert poined out, I'm not seeing anything particular problematic with th= e architectures lacking CONFIG_PREEMPT at the moment. This seems to be more something about organizing KConfig files. I find it a bit unfair that maintainers of architectures that have huge com= panies behind them use their manpower to urge less popular architectures for remov= al just because they don't have 150 people working on the port so they can keep up = with design changes quickly. Adrian --=20 .''`. John Paul Adrian Glaubitz : :' : Debian Developer `. `' Physicist `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913