From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.92] helo=mail.sourceforge.net) by sc8-sf-list1.sourceforge.net with esmtp (Exim 4.30) id 1E7F9U-0003jL-4H for user-mode-linux-devel@lists.sourceforge.net; Mon, 22 Aug 2005 09:28:00 -0700 Received: from smtp002.mail.ukl.yahoo.com ([217.12.11.33]) by mail.sourceforge.net with smtp (Exim 4.44) id 1E7F9Q-0005eu-CW for user-mode-linux-devel@lists.sourceforge.net; Mon, 22 Aug 2005 09:28:00 -0700 From: Blaisorblade Subject: Re: [uml-devel] Re: [RFC] [patch 0/39] remap_file_pages protection support, try 2 References: <200508122033.06385.blaisorblade@yahoo.it> <20050814013849.GA23795@elte.hu> In-Reply-To: <20050814013849.GA23795@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200508221807.58354.blaisorblade@yahoo.it> 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: Mon, 22 Aug 2005 18:07:57 +0200 To: user-mode-linux-devel@lists.sourceforge.net Cc: Ingo Molnar , Andrew Morton , LKML , Jeff Dike , Bodo Stroesser On Sunday 14 August 2005 03:38, Ingo Molnar wrote: > * Blaisorblade wrote: > > Ok, I've been working for the past two weeks learning well the Linux > > VM, understanding the Ingo's remap_file_pages protection support and > > its various weakness (due to lack of time on his part), and splitting > > and finishing it. > > Here follow a series of 39 _little_ patches against the git-commit-id > > 889371f61fd5bb914d0331268f12432590cf7e85, which means between > > 2.6.13-rc4 and -rc5. > > Actually, the first 7 ones are unrelated trivial cleanups which > > somehow get in the way on this work and that can probably be merged > > even now (many are just comment fixes). > > Since I was a VM newbie until two weeks ago, I've separated my changes > > into many little patches. > hi. Great work! I'm wondering about this comment in Thanks for your appreciation. > rfp-fix-unmap-linear.patch: > > Additionally, add a missing TLB flush in both locations. However, > > there'is some excess of flushes in these functions. > excess TLB flushes one of the reasons of bad UML performance, so you > should really review them and not do spurious TLB flushes. After a bit of thought I realized that there was no spurious flush in those function, and that I didn't need to add any, because after setting a PTE as missing and flushing the TLB, I can freely alter it if I don't make it present again (right?), without other TLB flushes. -- Inform me of my mistakes, so I can keep imitating Homer Simpson's "Doh!". Paolo Giarrusso, aka Blaisorblade (Skype ID "PaoloGiarrusso", ICQ 215621894) http://www.user-mode-linux.org/~blaisorblade ___________________________________ Yahoo! Messenger: chiamate gratuite in tutto il mondo http://it.beta.messenger.yahoo.com ------------------------------------------------------- SF.Net email is Sponsored by the Better Software Conference & EXPO September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel