From mboxrd@z Thu Jan 1 00:00:00 1970 Subject: Re: [patch] mm: fix race in COW logic From: Peter Zijlstra In-Reply-To: <20080623121831.GA26555@wotan.suse.de> References: <20080622153035.GA31114@wotan.suse.de> <20080623014940.GA29413@wotan.suse.de> <20080623121831.GA26555@wotan.suse.de> Content-Type: text/plain Date: Fri, 27 Jun 2008 11:13:12 +0200 Message-Id: <1214557992.2801.24.camel@twins.programming.kicks-ass.net> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Nick Piggin Cc: Hugh Dickins , Linus Torvalds , Linux Memory Management List , Andrew Morton List-ID: On Mon, 2008-06-23 at 14:18 +0200, Nick Piggin wrote: > BTW. Yes, the race identified is pretty slim, requiring a lot to happen > on other CPUs between a small non-preemptible window of instructions, > it *might* actually happen in practice on larger systems where cachelines > might be highly contended or take a long time to get from one place to > another... > and the -rt patchset where I assume ptl is preemptible too. Indeed. -- 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