From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Wilcox Subject: Re: Arches that don't support PREEMPT Date: Tue, 19 Sep 2023 15:32:05 +0100 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-Transfer-Encoding: 7bit Return-path: DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=3qzZ5QqVlcO5mNfNGbmbRviUaDRQSDEdLZbqk184E1A=; b=xtUPR8v2fWZ9UX Kue1AZKdRwpF5gg5JzHwbpVtgIfYqTxVCb084Ot5Wwa2rt866WRxePy22TMT2e54+WwUo0mOjXXaB mI0gUaDCUQ7+sf3uBmBkenWsii91P02CHL6sjW2jl/GdpX5nFIzKyUK8W30NkNM/If8qAGfw0s7/u 8KLmARxbBI1hS4GMweJGoCG8OmZntIeJqUW7WupW7y0uvItJcY/aUWcld84PrMnTwsZWEQGkRHdeh TH5Iwijt7zxgwUn0PKmaXppcHLhswkdZ9CThVYyMOKd1NELSrJVrBvS0qDv+OY/wX61sgb2YbOTvu AukqgfSWqceOwjiUSccg==; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=SidCZEV6eW0lcJ6NuB/uLvR734BxaKgfVBoDR9i1ilY=; b=wU6JouyF8Bxm56RpaenERGdpUO uCvAVUpRAqLEsiOGlctL7ZupHDmJIFbEljv7BpsiWCt0P+Eu8m9up5lt1qMWnxNwnJbtaVWvn2FQO 4pKdpCBLaE5AaX6Gst2Xuv0aasi95ZnKa4+CkMPcsqW3PJEhR/eMlp/4usTSnSmznL5I2UfrU1dem V9TSusY7h9TQCeE1ORzWfmKqeJBq5CEAIc84YqLmNerMa9UNwMBCfOxHRGWc+rMCfeIV01jDcHqaB /apAzpnS4eTJSYIuKueYpJsctmmF6g8UbjSkd+Xp1I9U0O/06u6cqRSZD5goB0T09jgJOfd51cvIn 2UW3Y5Cw==; Content-Disposition: inline In-Reply-To: List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-um" Errors-To: linux-um-bounces+glud-user-mode-linux-devel=m.gmane-mx.org@lists.infradead.org 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@vge 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.