From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 62889CE79AB for ; Wed, 20 Sep 2023 08:26:34 +0000 (UTC) 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:MIME-Version:Message-ID:Date:References :In-Reply-To:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=SKAC5KjF3c9ZejtvuS0by6WDs2nouec54tRUYpSQMLM=; b=q0N7ANUULF8TOP m204dMMI/AnngtVfujaJRaqE1+a6I2HgryeTvejBKpK+9tUZB5/2br3eeXP7KYCrsoQzXD/L56Uu5 cAPSL+0kyzBlj3Hh8hnJlxm/hF3iZnlTn7xSo4WmifbCCC/j4csHi6wX4ImnKrJ/cQ5PeT3VWhB+j 6EdT77vyaddLW/nl2BIazTKlQUVfevBFY8JVtxefM31weNT5Z/thFUe1C9vGtI8Xco+aLCpIIaaj2 3YAGqPU/TL0IJwho29CT2rdgxdhUc+ZvbwkS7UJjodrwVLtWFpamKPRBVGJhjcPMnmLzZyLoFPQaY fi89/AnrqgIQkb5+7LQw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qisXZ-002HhB-1K; Wed, 20 Sep 2023 08:26:33 +0000 Received: from galois.linutronix.de ([193.142.43.55]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qisXX-002Hg1-0Z for linux-um@lists.infradead.org; Wed, 20 Sep 2023 08:26:32 +0000 From: Thomas Gleixner DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1695198386; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=Cz3ybOd/ypkcGDuMCJQdl0UFouGTxpARZATHk1efhH0=; b=EGx2EBigs6+KVxSISL/lO4SeWI2/p5U3N6zV5areodcDyVNQT2YbEaxonhjEzXP7/szlID TMqjKMwwRJVKmQfn51MUW9KIbWl9E19kzugQpYPh1RqXMdMqyHRHId8GsHbiYMY1gupCr9 inWCgekLEVw9LLIxUEhX+SjOdAKmXLyfbATOE5SKrIhGQ6opMrTgQNDBWj6h+pupcy9mQY IAtJFpC+IZrsZhADhx21jPYjN4cUEmbdknYpq1yaFpD3q1JUKeyYvZEasHaRFyuKPfCocG sb/JjJcoHFqbdHPNLrqct85JyOKGX/90xcldUD95gAEiF72EcQ3euVx2thUmyg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1695198386; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=Cz3ybOd/ypkcGDuMCJQdl0UFouGTxpARZATHk1efhH0=; b=Zhs312twDc9TbsbkF5GT2tuvKzW8ClBRyZtMimieaTdcJbOGBK7CVUU6mFwCowxAhHysBo 5AdimDwJAjJms3Ag== To: Linus Torvalds , John Paul Adrian Glaubitz Cc: Peter Zijlstra , Matthew Wilcox , 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 In-Reply-To: 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> Date: Wed, 20 Sep 2023 10:26:25 +0200 Message-ID: <87edituu6m.ffs@tglx> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230920_012631_353854_91EF2411 X-CRM114-Status: GOOD ( 12.06 ) X-BeenThere: linux-um@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-um" Errors-To: linux-um-bounces+linux-um=archiver.kernel.org@lists.infradead.org On Tue, Sep 19 2023 at 10:25, Linus Torvalds wrote: > PeterZ mentioned the generic entry code, which does this for the entry > path. But it actually goes much deeper: just do a > > git grep preempt_disable arch/x86/kernel > > and then do the same for some other architectures. > > Looking at alpha, for example, there *are* hits for it, so at least > some of the code there clearly *tries* to do it. But does it cover all > the required parts? If it's never been tested, I'd be surprised if > it's all just ready to go. Interestingly enough m68k has zero instances, but it supports PREEMPT on the COLDFIRE subarchitecture... _______________________________________________ linux-um mailing list linux-um@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-um