From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sog-mx-4.v43.ch3.sourceforge.com ([172.29.43.194] helo=mx.sourceforge.net) by sfs-ml-1.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1ZsY16-0002ci-D3 for user-mode-linux-devel@lists.sourceforge.net; Sat, 31 Oct 2015 15:24:28 +0000 Received: from www17.your-server.de ([213.133.104.17]) by sog-mx-4.v43.ch3.sourceforge.com with esmtps (TLSv1:AES256-SHA:256) (Exim 4.76) id 1ZsY15-0008Ri-1P for user-mode-linux-devel@lists.sourceforge.net; Sat, 31 Oct 2015 15:24:28 +0000 Message-ID: <1446305051.3238.13.camel@m3y3r.de> From: Thomas Meyer Date: Sat, 31 Oct 2015 16:24:11 +0100 In-Reply-To: <5634DC7B.3010707@nod.at> References: <1445416947-824802-1-git-send-email-aivanov@brocade.com> <562D236E.7020108@kot-begemot.co.uk> <562DFC90.9030308@nod.at> <5631BB4E.4010301@kot-begemot.co.uk> <1446304232.3238.8.camel@m3y3r.de> <5634DAA4.70308@nod.at> <1446304594.3238.11.camel@m3y3r.de> <5634DC7B.3010707@nod.at> Mime-Version: 1.0 List-Id: The user-mode Linux development list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: user-mode-linux-devel-bounces@lists.sourceforge.net Subject: Re: [uml-devel] [PATCH v3] um: Switch clocksource to hrtimers To: Richard Weinberger , Anton Ivanov Cc: "user-mode-linux-devel@lists.sourceforge.net" Am Samstag, den 31.10.2015, 16:21 +0100 schrieb Richard Weinberger: > Am 31.10.2015 um 16:16 schrieb Thomas Meyer: > > mhh. strange. I didn't see this behaviour on my machine, but my > > machine > > is a rare single core system so, likely a race condition while > > relaying > > the timer interrupt to the userspace process. > > Here I can trigger it by starting UML, logging in and waiting ~5min. > Then i try to run "top" --> top hangs forever. > > > But I'm out of ideas how this could happen! > > Maybe some stupid timeslice over/underflow. > > > what happens when you send the hanging process a SIGVTALRM signal? > > does > > it proceed correctly? > > You mean sending SIGVTALRM to the UML host process? No, to the hanging userspace process, maybe the uml host process did receive a timer interrupt, but failed to relay this signal to the correct userspace process. > It runs normally, I can also login on other ttys. > > Thanks, > //richard ------------------------------------------------------------------------------ _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel