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 8A4B3CD5BCD for ; Tue, 19 Sep 2023 15:17:31 +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=10Edmgrg0laaIwxHzvg4Kk4mmnvvWpzveYCXBFe8JLg=; b=l1evXCtEqWjLM+ xwNYgLynGep1ecaN2KDVRh8qbKnItAMBWwSRSXOzgHGqPLTR4vXSB3YhDLXGmrrU2um1756+miMx3 fA4SyEl9Wc/njsamcCbX17sfO+l5WGYxpYisds+04Mrr8qmgKZpJXpT7qnOjygMZXCsY5dPu2jztS d32iAUIZh01EnrmxEplhebW27Ymod+RwSFkGjMzHEKpvIg32yG22pmtkArmIy9OKzjtd24iuJCt10 DH7PkYGSL3cMNkbl+95jyk4Je3nbPdM5uh9lHJrjml2xxYT2pQ7T0NIdFTvEZVI5NKQDiZvt2Zex1 jqYw6lkw8JjVeJeZwSKg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qicTh-000kQG-2p; Tue, 19 Sep 2023 15:17:29 +0000 Received: from galois.linutronix.de ([193.142.43.55]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qicTf-000kPW-1k for linux-um@lists.infradead.org; Tue, 19 Sep 2023 15:17:28 +0000 From: Thomas Gleixner DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1695136644; 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=ziuwOLCbw6a4ZLSyQtFECkdi5DpyFdO1Yq7Iy0MyDm0=; b=xfTYwe+EZSOhJ5ZWyANndueq2hUu/L4a8CM1/oAoRZtzh4dXrcGLYGZmFDRlRbbmYt7Vk5 q2a8s67GoVgkH/vtyTkmPv/zMoH9BYGxAEHj2NTitWpnBbFutuNDI6H1JPYV43N7FKxaoQ 4hC/61NGBBGSMcuN2eSwwtsASqR3q3H06Cy7Z7rF614qv6pL1DZ+t3J4cwWM4+dA2YExPS Yj2UGnTJ24Wa6zHkGlCKoO+Zi6tBfDavDhwHUDdHZm3LfgYdhB7jLgydTPgxJk5eQXI5DE 90AM6SeB7t4A+rORL9BVHHLD86RdMOvst214XGduAHjS54S1ZtgQLqiA15ULdw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1695136644; 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=ziuwOLCbw6a4ZLSyQtFECkdi5DpyFdO1Yq7Iy0MyDm0=; b=1eCCtDGKEUrDxtL8LY3g3sZgbE2u2Gi+z3OLPbxme25w5xD5smNfNB+DrDuC//vli78Ete kk+DBO2N6UphuqAw== To: Anton Ivanov , Peter Zijlstra , John Paul Adrian Glaubitz Cc: Matthew Wilcox , 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 , 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: Tue, 19 Sep 2023 17:17:23 +0200 Message-ID: <87y1h2ur98.ffs@tglx> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230919_081727_742767_BBC000FF X-CRM114-Status: UNSURE ( 7.90 ) X-CRM114-Notice: Please train this message. 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 15:21, Anton Ivanov wrote: > On 19/09/2023 14:42, Peter Zijlstra wrote: >> If you're working on one of them, then surely it's a simple matter of >> working on adding CONFIG_PREEMPT support :-) > > In the case of UML adding preempt will be quite difficult. I looked at > this a few years back. What's so difficult about it? Thanks, tglx _______________________________________________ linux-um mailing list linux-um@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-um