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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 52DC3C4708E for ; Tue, 3 Jan 2023 09:48:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236812AbjACJsA (ORCPT ); Tue, 3 Jan 2023 04:48:00 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33278 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237278AbjACJrm (ORCPT ); Tue, 3 Jan 2023 04:47:42 -0500 X-Greylist: delayed 479 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Tue, 03 Jan 2023 01:47:39 PST Received: from outbound-smtp25.blacknight.com (outbound-smtp25.blacknight.com [81.17.249.193]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C8DA9E0DE for ; Tue, 3 Jan 2023 01:47:39 -0800 (PST) Received: from mail.blacknight.com (pemlinmail05.blacknight.ie [81.17.254.26]) by outbound-smtp25.blacknight.com (Postfix) with ESMTPS id 30700CAC7C for ; Tue, 3 Jan 2023 09:39:39 +0000 (GMT) Received: (qmail 10971 invoked from network); 3 Jan 2023 09:39:39 -0000 Received: from unknown (HELO techsingularity.net) (mgorman@techsingularity.net@[84.203.198.246]) by 81.17.254.9 with ESMTPSA (AES256-SHA encrypted, authenticated); 3 Jan 2023 09:39:38 -0000 Date: Tue, 3 Jan 2023 09:39:37 +0000 From: Mel Gorman To: gregkh@linuxfoundation.org Cc: jack@suse.cz, tglx@linutronix.de, stable@vger.kernel.org Subject: Re: FAILED: patch "[PATCH] rtmutex: Add acquire semantics for rtmutex lock acquisition" failed to apply to 5.15-stable tree Message-ID: <20230103093937.enoobqqkdoumdmcc@techsingularity.net> References: <167265568418742@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: <167265568418742@kroah.com> Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org On Mon, Jan 02, 2023 at 11:34:44AM +0100, gregkh@linuxfoundation.org wrote: > > The patch below does not apply to the 5.15-stable tree. > If someone wants it applied there, or to any other stable or longterm > tree, then please email the backport, including the original git commit > id to . > > Possible dependencies: > > 1c0908d8e441 ("rtmutex: Add acquire semantics for rtmutex lock acquisition slow path") > ee042be16cb4 ("locking: Apply contention tracepoints in the slow path") > d257cc8cb8d5 ("locking/rwsem: Make handoff bit handling more consistent") > 7cdacc5f52d6 ("locking/rwsem: Disable preemption for spinning region") > > thanks, > > greg k-h > Hi Greg, I don't plan to backport this to -stable. It's PREEMPT_RT-specific so anyone how needs it are managing their own OOT patches. The prerequisites are not -stable material so ideally anyone backporting would be functionally verifying their target workloads still works ok and meets deadlines. Normal users of stable kernels are not impacted by the bug this patch fixes. -- Mel Gorman SUSE Labs