From mboxrd@z Thu Jan 1 00:00:00 1970 From: Steven Rostedt Subject: Re: Arches that don't support PREEMPT Date: Tue, 19 Sep 2023 11:31:08 -0400 Message-ID: <20230919113108.1c988906@gandalf.local.home> 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-Transfer-Encoding: 7bit Return-path: In-Reply-To: List-ID: Content-Type: text/plain; charset="us-ascii" To: Matthew Wilcox Cc: John Paul Adrian Glaubitz , 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, 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 On Tue, 19 Sep 2023 15:32:05 +0100 Matthew Wilcox wrote: > 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. Or the use case of a preempt kernel on said arch has never been a request. Just because it was available doesn't necessarily mean it's required. Please, let's not jump to threats of removal just to get a feature in. Simply ask first. I didn't see anyone reaching out to the maintainers asking for this as it will be needed for a new feature that will likely make maintaining said arch easier. Everything is still in brainstorming mode. -- Steve