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 2E5C8C4332F for ; Tue, 5 Apr 2022 08:04:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233352AbiDEIGS (ORCPT ); Tue, 5 Apr 2022 04:06:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55674 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232452AbiDEHyC (ORCPT ); Tue, 5 Apr 2022 03:54:02 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5B5011EEF2 for ; Tue, 5 Apr 2022 00:49:14 -0700 (PDT) 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=qqcBayd3twgxHDzuUCfiVsnYaxI4OFRrgGSkwQ01Fos=; b=AgtzSG9LVE8WJXJrlLh1SM5akI 05wDS7s7sM9L/4VBp3vjfCCuF1l73A466G8l5bkfkpvDcrD5DbIQrsDf9/jiORRaofVnUEfxExuKP 8JoQ/7RUWSLZCSDz7em+jXPuYpoc9GEgyyGDpu6cGDSR4P0qvBUxl4JhN2kcr10HuqpvrKGD3tDY8 LEZEw0aP5J2rv/bCjcZG/OCcUWwajk59uFPzuF4b1WPZXcq2aZ9tzrxKEd3ztkbHY7xURo4hekmUR 9a1JKR7lGu6ncIJz1KeRn9jtYARUW1rSFJ9Q6VDAvy6d5xOekd9al9WRYAJXwbMJadMqXWCTtGoBv z9bIE6ag==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=worktop.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1nbdvu-006TKy-H3; Tue, 05 Apr 2022 07:48:58 +0000 Received: by worktop.programming.kicks-ass.net (Postfix, from userid 1000) id 14053986B5B; Tue, 5 Apr 2022 09:48:56 +0200 (CEST) Date: Tue, 5 Apr 2022 09:48:55 +0200 From: Peter Zijlstra To: "T.J. Alumbaugh" Cc: Steven Rostedt , LKML , Thomas Gleixner , Sebastian Andrzej Siewior , joel@joelfernandes.org Subject: Re: sched_core_balance() releasing interrupts with pi_lock held Message-ID: <20220405074855.GA30877@worktop.programming.kicks-ass.net> References: <20220308161455.036e9933@gandalf.local.home> <20220315174606.02959816@gandalf.local.home> <20220316202734.GJ8939@worktop.programming.kicks-ass.net> <20220316210341.GD14330@worktop.programming.kicks-ass.net> <20220321133037.7d0d0c7f@gandalf.local.home> <20220329172236.48683eb5@gandalf.local.home> <51b21470-cd72-7ae3-6f33-2dd2e1d6b716@chromium.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <51b21470-cd72-7ae3-6f33-2dd2e1d6b716@chromium.org> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Apr 04, 2022 at 04:17:54PM -0400, T.J. Alumbaugh wrote: > > On 3/29/22 17:22, Steven Rostedt wrote: > > On Mon, 21 Mar 2022 13:30:37 -0400 > > Steven Rostedt wrote: > > > > > On Wed, 16 Mar 2022 22:03:41 +0100 > > > Peter Zijlstra wrote: > > > > > > > Does something like the below (untested in the extreme) help? > > > Hi Peter, > > > > > > This has been tested extensively by the ChromeOS team and said that it does > > > appear to fix the problem. > > > > > > Could you get this into mainline, and tag it for stable so that it can be > > > backported to the appropriate stable releases? > > > > > > Thanks for the fix! > > > > > Hi Peter, > > > > I just don't want you to forget about this :-) > > > > -- Steve > > > Hi Peter, > > Just a note that if/when you send this out as a patch, feel free to add: > > Tested-by: T.J. Alumbaugh https://lkml.kernel.org/r/20220330160535.GN8939@worktop.programming.kicks-ass.net