From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx200.postini.com [74.125.245.200]) by kanga.kvack.org (Postfix) with SMTP id 277B76B005A for ; Thu, 11 Oct 2012 18:14:15 -0400 (EDT) Date: Thu, 11 Oct 2012 15:14:13 -0700 From: Andrew Morton Subject: Re: kswapd0: wxcessive CPU usage Message-Id: <20121011151413.3ab58542.akpm@linux-foundation.org> In-Reply-To: <507688CC.9000104@suse.cz> References: <507688CC.9000104@suse.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Jiri Slaby Cc: linux-mm@kvack.org, LKML , Jiri Slaby On Thu, 11 Oct 2012 10:52:28 +0200 Jiri Slaby wrote: > with 3.6.0-next-20121008, kswapd0 is spinning my CPU at 100% for 1 > minute or so. If I try to suspend to RAM, this trace appears: > kswapd0 R running task 0 577 2 0x00000000 > 0000000000000000 00000000000000c0 cccccccccccccccd ffff8801c4146800 > ffff8801c4b15c88 ffffffff8116ee05 0000000000003e32 ffff8801c3a79000 > ffff8801c4b15ca8 ffffffff8116fdf8 ffff8801c480f398 ffff8801c3a79000 > Call Trace: > [] ? put_super+0x25/0x40 > [] ? grab_super_passive+0x24/0xa0 > [] ? prune_super+0x149/0x1b0 > [] ? shrink_slab+0xa1/0x2d0 > [] ? kswapd+0x66d/0xb60 > [] ? try_to_free_pages+0x180/0x180 > [] ? kthread+0xc0/0xd0 > [] ? kthread_create_on_node+0x130/0x130 > [] ? ret_from_fork+0x7c/0x90 > [] ? kthread_create_on_node+0x130/0x130 Could you please do a sysrq-T a few times while it's spinning, to confirm that this trace is consistently the culprit? -- 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