Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754677Ab2FSTE1 (ORCPT ); Tue, 19 Jun 2012 15:04:27 -0400 Received: from mail.renton.name ([90.155.165.44]:33998 "EHLO beaver.old-horrors.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753043Ab2FSTE0 (ORCPT ); Tue, 19 Jun 2012 15:04:26 -0400 X-Greylist: delayed 321 seconds by postgrey-1.27 at vger.kernel.org; Tue, 19 Jun 2012 15:04:26 EDT Date: Tue, 19 Jun 2012 22:58:56 +0400 From: Alexey Vlasov To: linux-kernel@vger.kernel.org Subject: Attaching a process to cgroups Message-ID: <20120619185856.GC31797@beaver> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1656 Lines: 32 Hi. Is it possible to somehow fasten a process of pid attaching to cgroup? The problem is the pid attaches to a task-file with some strange delay: 22:28:00.788224 open("/sys/fs/cgroup/memory/virtwww/w_test-l24-apache1_4bdf3d13/apache/tasks", O_WRONLY|O_CREAT|O_APPEND, 0666) = 3 <0.000035> 22:28:00.788289 fstat(3, {st_mode=S_IFREG|0644, st_size=0, ...}) = 0 <0.000004> 22:28:00.788326 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5e78074000 <0.000005> 22:28:00.788355 fstat(3, {st_mode=S_IFREG|0644, st_size=0, ...}) = 0 <0.000004> 22:28:00.788389 lseek(3, 0, SEEK_SET) = 0 <0.000004> 22:28:00.788426 write(3, "16317\n", 6) = 6 <0.128094> 22:28:00.916578 close(3) = 0 <0.000006> For a comparison here's a test attaching pid-file in placed tmpfs: 22:24:41.892562 open("/tmp/w_test-l24-apache1_4bdf3d13/tasks", O_WRONLY|O_CREAT|O_APPEND, 0666) = 3 <0.000010> 22:24:41.892597 fstat(3, {st_mode=S_IFREG|0644, st_size=6, ...}) = 0 <0.000004> 22:24:41.892631 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f5685b6f000 <0.000006> 22:24:41.892664 fstat(3, {st_mode=S_IFREG|0644, st_size=6, ...}) = 0 <0.000004> 22:24:41.892701 lseek(3, 6, SEEK_SET) = 6 <0.000004> 22:24:41.892738 write(3, "25966\n", 6) = 6 <0.000008> 22:24:41.892767 close(3) = 0 <0.000005> Here goes it immediately. -- BRGDS. Alexey Vlasov. -- 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/