From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.12] helo=sc8-sf-mx2.sourceforge.net) by sc8-sf-list1.sourceforge.net with esmtp (Exim 4.30) id 1Diwz0-00043S-So for user-mode-linux-devel@lists.sourceforge.net; Thu, 16 Jun 2005 09:12:46 -0700 Received: from lakshmi.addtoit.com ([198.99.130.6] helo=lakshmi.solana.com) by sc8-sf-mx2.sourceforge.net with esmtp (Exim 4.41) id 1Diwz0-0007kd-9f for user-mode-linux-devel@lists.sourceforge.net; Thu, 16 Jun 2005 09:12:46 -0700 Received: from ccure.user-mode-linux.org (lakshmi.solana.com [127.0.0.1]) by lakshmi.solana.com (8.11.2/8.11.2) with ESMTP id j5GFHCm01018 for ; Thu, 16 Jun 2005 11:17:13 -0400 Received: from ccure.user-mode-linux.org (localhost.localdomain [127.0.0.1]) j5GG7U5H006362 for ; Thu, 16 Jun 2005 12:07:30 -0400 From: Jeff Dike Message-ID: <20050616160728.GA6040@ccure.user-mode-linux.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Subject: [uml-devel] Recent patches of note Sender: user-mode-linux-devel-admin@lists.sourceforge.net Errors-To: user-mode-linux-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: The user-mode Linux development list List-Post: List-Help: List-Subscribe: , List-Archive: Date: Thu, 16 Jun 2005 12:07:28 -0400 To: user-mode-linux-devel@lists.sourceforge.net I'd like to call attention to some recent patches that may be of interest to people before they hit mainline. These are all on my incremental patches page, http://user-mode-linux.sf.net/patches.html First, sched-starve (http://user-mode-linux.sourceforge.net/work/current/2.6/2.6.12-rc6-mm1/patches/sched-starve) This fixes a timer initialization botch which resulted in soft lockup warnings in recent kernels, total non-responsiveness (i.e. nothing else would be scheduled) under any workload which avoided idling the kernel, and may be responsible for the load average >= 1 problem. I don't see that last here for some reason, so I'd like some confirmation (or not) that this patch fixes that. Second, I implemented soft interrupts, which reimplements interrupt enabling and disabling with a flag rather than with sigprocmask. This cuts down hugely on the number of system calls that UML makes, resulting in a very noticable performance increase. This patch, plus the other system call reducing patches which immediately follow it, speed up my kernel builds by 20-25%. By far the largest piece of this is softints, although skas-no-flush-kernel also is noticable. I'd like people to check out softints, at least, and report any problems. It's running fine here, but interrupt handling is a sensitive area, so I'd like to know people are running it without problems before pushing it to mainline. Jeff ------------------------------------------------------- SF.Net email is sponsored by: Discover Easy Linux Migration Strategies from IBM. Find simple to follow Roadmaps, straightforward articles, informative Webcasts and more! Get everything you need to get up to speed, fast. http://ads.osdn.com/?ad_id=7477&alloc_id=16492&op=click _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel