Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753604AbbDRXk4 (ORCPT ); Sat, 18 Apr 2015 19:40:56 -0400 Received: from bh-25.webhostbox.net ([208.91.199.152]:54731 "EHLO bh-25.webhostbox.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751197AbbDRXkx (ORCPT ); Sat, 18 Apr 2015 19:40:53 -0400 Date: Sat, 18 Apr 2015 16:40:50 -0700 From: Guenter Roeck To: linux-kernel@vger.kernel.org Cc: Linus Torvalds , Peter Zijlstra , Ingo Molnar Subject: Re: qemu:arm test failure due to commit 8053871d0f7f (smp: Fix smp_call_function_single_async() locking) Message-ID: <20150418234050.GA5987@roeck-us.net> References: <20150418232325.GA22411@roeck-us.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20150418232325.GA22411@roeck-us.net> User-Agent: Mutt/1.5.23 (2014-03-12) X-Authenticated_sender: guenter@roeck-us.net X-OutGoing-Spam-Status: No, score=-1.0 X-CTCH-PVer: 0000001 X-CTCH-Spam: Unknown X-CTCH-VOD: Unknown X-CTCH-Flags: 0 X-CTCH-RefID: str=0001.0A020204.5532EB85.000D,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0 X-CTCH-Score: 0.000 X-CTCH-ScoreCust: 0.000 X-CTCH-Rules: X-CTCH-SenderID: linux@roeck-us.net X-CTCH-SenderID-Flags: 0 X-CTCH-SenderID-TotalMessages: 1 X-CTCH-SenderID-TotalSpam: 0 X-CTCH-SenderID-TotalSuspected: 0 X-CTCH-SenderID-TotalConfirmed: 0 X-CTCH-SenderID-TotalBulk: 0 X-CTCH-SenderID-TotalVirus: 0 X-CTCH-SenderID-TotalRecipients: 0 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - bh-25.webhostbox.net X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - roeck-us.net X-Get-Message-Sender-Via: bh-25.webhostbox.net: mailgid no entry from get_relayhosts_entry X-Source: X-Source-Args: X-Source-Dir: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 753 Lines: 18 On Sat, Apr 18, 2015 at 04:23:25PM -0700, Guenter Roeck wrote: > Hi all, > > my qemu test for arm:vexpress fails with the latest upstream kernel. It fails > hard - I don't get any output from the console. Bisect points to commit > 8053871d0f7f ("smp: Fix smp_call_function_single_async() locking"). > Reverting this commit fixes the problem. > Additional observation: The system boots if I add "-smp cpus=4" to the qemu options. It does still hang, however, with "-smp cpus=2" and "-smp cpus=3". Guenter -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/