From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Serge E. Hallyn" Subject: Re: [RFC v8][PATCH 0/12] Kernel based checkpoint/restart Date: Tue, 4 Nov 2008 12:44:36 -0600 Message-ID: <20081104184436.GA16328@us.ibm.com> References: <1225374675-22850-1-git-send-email-orenl@cs.columbia.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1225374675-22850-1-git-send-email-orenl-eQaUEPhvms7ENvBUuze7eA@public.gmane.org> Sender: linux-api-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Oren Laadan Cc: Linus Torvalds , containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org, linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Thomas Gleixner , Dave Hansen , Ingo Molnar , "H. Peter Anvin" , Alexander Viro List-Id: linux-api@vger.kernel.org Quoting Oren Laadan (orenl-eQaUEPhvms7ENvBUuze7eA@public.gmane.org): > Basic checkpoint-restart [C/R]: v8 adds support for "external" checkpoint > and improves documentation. Older announcements below. The following test-program seems to reliably trigger a bug. Run it in a new set of namespaces, i.e. ns_exec -cmpiuU ./runme > /tmp/o then control-c it. The second time I do that, I get the dcache.c:666 BUG(). #include #include #include #include #include #define __NR_checkpoint 333 int main (int argc, char *argv[]) { pid_t pid = getpid(); int ret; close(0); close(2); ret = syscall (__NR_checkpoint, pid, STDOUT_FILENO, 0); if (ret < 0) perror ("checkpoint"); else printf ("checkpoint id %d\n", ret); sleep(200); return (ret > 0 ? 0 : 1); } -serge -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756536AbYKDSox (ORCPT ); Tue, 4 Nov 2008 13:44:53 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754571AbYKDSol (ORCPT ); Tue, 4 Nov 2008 13:44:41 -0500 Received: from e35.co.us.ibm.com ([32.97.110.153]:37829 "EHLO e35.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754370AbYKDSok (ORCPT ); Tue, 4 Nov 2008 13:44:40 -0500 Date: Tue, 4 Nov 2008 12:44:36 -0600 From: "Serge E. Hallyn" To: Oren Laadan Cc: Linus Torvalds , containers@lists.linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-api@vger.kernel.org, Thomas Gleixner , Dave Hansen , Ingo Molnar , "H. Peter Anvin" , Alexander Viro Subject: Re: [RFC v8][PATCH 0/12] Kernel based checkpoint/restart Message-ID: <20081104184436.GA16328@us.ibm.com> References: <1225374675-22850-1-git-send-email-orenl@cs.columbia.edu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1225374675-22850-1-git-send-email-orenl@cs.columbia.edu> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Quoting Oren Laadan (orenl@cs.columbia.edu): > Basic checkpoint-restart [C/R]: v8 adds support for "external" checkpoint > and improves documentation. Older announcements below. The following test-program seems to reliably trigger a bug. Run it in a new set of namespaces, i.e. ns_exec -cmpiuU ./runme > /tmp/o then control-c it. The second time I do that, I get the dcache.c:666 BUG(). #include #include #include #include #include #define __NR_checkpoint 333 int main (int argc, char *argv[]) { pid_t pid = getpid(); int ret; close(0); close(2); ret = syscall (__NR_checkpoint, pid, STDOUT_FILENO, 0); if (ret < 0) perror ("checkpoint"); else printf ("checkpoint id %d\n", ret); sleep(200); return (ret > 0 ? 0 : 1); } -serge From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from d03relay02.boulder.ibm.com (d03relay02.boulder.ibm.com [9.17.195.227]) by e33.co.us.ibm.com (8.13.1/8.13.1) with ESMTP id mA4IiGHI000868 for ; Tue, 4 Nov 2008 11:44:16 -0700 Received: from d03av02.boulder.ibm.com (d03av02.boulder.ibm.com [9.17.195.168]) by d03relay02.boulder.ibm.com (8.13.8/8.13.8/NCO v9.1) with ESMTP id mA4Iic48149868 for ; Tue, 4 Nov 2008 11:44:38 -0700 Received: from d03av02.boulder.ibm.com (loopback [127.0.0.1]) by d03av02.boulder.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id mA4Ii8Pn005398 for ; Tue, 4 Nov 2008 11:44:09 -0700 Date: Tue, 4 Nov 2008 12:44:36 -0600 From: "Serge E. Hallyn" Subject: Re: [RFC v8][PATCH 0/12] Kernel based checkpoint/restart Message-ID: <20081104184436.GA16328@us.ibm.com> References: <1225374675-22850-1-git-send-email-orenl@cs.columbia.edu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1225374675-22850-1-git-send-email-orenl@cs.columbia.edu> Sender: owner-linux-mm@kvack.org Return-Path: To: Oren Laadan Cc: Linus Torvalds , containers@lists.linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-api@vger.kernel.org, Thomas Gleixner , Dave Hansen , Ingo Molnar , "H. Peter Anvin" , Alexander Viro List-ID: Quoting Oren Laadan (orenl@cs.columbia.edu): > Basic checkpoint-restart [C/R]: v8 adds support for "external" checkpoint > and improves documentation. Older announcements below. The following test-program seems to reliably trigger a bug. Run it in a new set of namespaces, i.e. ns_exec -cmpiuU ./runme > /tmp/o then control-c it. The second time I do that, I get the dcache.c:666 BUG(). #include #include #include #include #include #define __NR_checkpoint 333 int main (int argc, char *argv[]) { pid_t pid = getpid(); int ret; close(0); close(2); ret = syscall (__NR_checkpoint, pid, STDOUT_FILENO, 0); if (ret < 0) perror ("checkpoint"); else printf ("checkpoint id %d\n", ret); sleep(200); return (ret > 0 ? 0 : 1); } -serge -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org