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Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1qibll-0008Rn-TQ; Tue, 19 Sep 2023 14:32:05 +0000 Date: Tue, 19 Sep 2023 15:32:05 +0100 From: Matthew Wilcox To: John Paul Adrian Glaubitz Cc: Peter Zijlstra , 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 Subject: Re: Arches that don't support PREEMPT Message-ID: References: <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> <20230919141627.GB39281@noisy.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Queue-Id: D44D740014 X-Rspam-User: X-Rspamd-Server: rspam02 X-Stat-Signature: qusesbj4eued3z6dbshmmuh33si647m5 X-HE-Tag: 1695133943-227373 X-HE-Meta: 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 qaGUOW/l Oh/mToUS0nUU4i9k+95WVLN4RkYIH/DxzvdP3QO3zi6DqeW1b8NC+0U3TrR7Iifydu2IY68t988qgOLz7Yjv4dVPlWDdj49VGeInLHuiCN3smUHQlxn6EdRAFgI6LRFdStpdX6p1GM7LwEqg= 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, Sep 19, 2023 at 04:24:48PM +0200, John Paul Adrian Glaubitz wrote: > If the conversion isn't hard, why is the first reflex the urge to remove an architecture > instead of offering advise how to get the conversion done? Because PREEMPT has been around since before 2005 (cc19ca86a023 created Kconfig.preempt and I don't need to go back further than that to make my point), and you haven't done the work yet. Clearly it takes the threat of removal to get some kind of motion.