Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756944AbXEQQYn (ORCPT ); Thu, 17 May 2007 12:24:43 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755555AbXEQQYf (ORCPT ); Thu, 17 May 2007 12:24:35 -0400 Received: from as4.cineca.com ([130.186.84.213]:43209 "EHLO as4.cineca.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755472AbXEQQYf (ORCPT ); Thu, 17 May 2007 12:24:35 -0400 Message-ID: <464C81B5.8070101@users.sourceforge.net> From: Andrea Righi Reply-To: righiandr@users.sourceforge.net User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.3) Gecko/20070326 Thunderbird/2.0.0.0 Mnenhy/0.7.5.666 MIME-Version: 1.0 To: LKML , linux-mm@kvack.org Subject: [RFC] log out-of-virtual-memory events X-Enigmail-Version: 0.95.0 OpenPGP: id=77CEF397; url=keyserver.veridis.com Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Date: Thu, 17 May 2007 18:24:28 +0200 (MEST) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1654 Lines: 52 I'm looking for a way to keep track of the processes that fail to allocate new virtual memory. What do you think about the following approach (untested)? -- Print informations about the processes that fail to allocate virtual memory. Signed-off-by: Andrea Righi diff -urpN linux-2.6.21/mm/mmap.c linux-2.6.21-vm-log-enomem/mm/mmap.c --- linux-2.6.21/mm/mmap.c 2007-04-26 05:08:32.000000000 +0200 +++ linux-2.6.21-vm-log-enomem/mm/mmap.c 2007-05-17 18:05:39.000000000 +0200 @@ -77,6 +77,26 @@ int sysctl_max_map_count __read_mostly = atomic_t vm_committed_space = ATOMIC_INIT(0); /* + * Print current process informations when it fails to allocate new virtual + * memory. + */ +static inline void log_vm_enomem(void) +{ + unsigned long total_vm = 0; + struct mm_struct *mm; + + task_lock(current); + mm = current->mm; + if (mm) + total_vm = mm->total_vm; + task_unlock(current); + + printk(KERN_INFO + "out of virtual memory for process %d (%s): total_vm=%lu, uid=%d\n", + current->pid, current->comm, total_vm, current->uid); +} + +/* * Check that a process has enough memory to allocate a new virtual * mapping. 0 means there is enough memory for the allocation to * succeed and -ENOMEM implies there is not. @@ -175,6 +195,7 @@ int __vm_enough_memory(long pages, int c return 0; error: vm_unacct_memory(pages); + log_vm_enomem(); return -ENOMEM; } - 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/