Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758121Ab0FISgE (ORCPT ); Wed, 9 Jun 2010 14:36:04 -0400 Received: from THUNK.ORG ([69.25.196.29]:41267 "EHLO thunker.thunk.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758067Ab0FISgD (ORCPT ); Wed, 9 Jun 2010 14:36:03 -0400 Date: Wed, 09 Jun 2010 14:36:00 -0400 Message-Id: To: Dave Airlie , David Howells cc: linux-kernel@vger.kernel.org Subject: Why is kslowd accumulating so much CPU time? From: "Theodore Ts'o" Phone: (781) 391-3464 X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: tytso@thunk.org X-SA-Exim-Scanned: No (on thunker.thunk.org); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1308 Lines: 29 My laptop is running 2.6.35-rc2 (plus a few patches) and after not quite four hours of beeing booted (3:45 to be precise), top shows that kslowd has accumulated as surprising amount of CPU time. From top display: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 6173 root 15 -5 0 0 0 S 6 0.0 10:42.91 kslowd001 1219 root 15 -5 0 0 0 S 5 0.0 11:00.68 kslowd000 1765 root 15 -5 0 0 0 S 5 0.0 10:59.20 kslowd002 6784 root 15 -5 0 0 0 S 4 0.0 10:34.37 kslowd003 4946 root 20 0 144m 34m 17m S 3 0.9 2:24.62 Xorg This came up because I was trying to figure out why mouse response was being so jerky. There aren't that many users of slow-work, and given that I'm not using cifs, fscache, gfs2, my suspicions are falling on drivers/gpu/drm/drm_crtc_helper.c (Would this be something that would be in use on a Lenovo T400 laptop?) Is there any way to easily see what is scheduling themselves to use the slow workqueue? Thanks, - Ted -- 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/