From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Tue, 13 May 2003 16:29:30 -0700 From: William Lee Irwin III Subject: Re: Race between vmtruncate and mapped areas? Message-ID: <20030513232930.GD8978@holomorphy.com> References: <154080000.1052858685@baldur.austin.ibm.com> <3EC15C6D.1040403@kolumbus.fi> <199610000.1052864784@baldur.austin.ibm.com> <20030513224929.GX8978@holomorphy.com> <220550000.1052866808@baldur.austin.ibm.com> <20030513231139.GZ8978@holomorphy.com> <247390000.1052867776@baldur.austin.ibm.com> <20030513232038.GB8978@holomorphy.com> <266860000.1052868500@baldur.austin.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <266860000.1052868500@baldur.austin.ibm.com> Sender: owner-linux-mm@kvack.org Return-Path: To: Dave McCracken Cc: Mika Penttil? , Linux Memory Management , Linux Kernel List-ID: On Tuesday, May 13, 2003 16:20:38 -0700 William Lee Irwin III wrote: >> The mmap_sem works because then ->i_size can't be sampled by >> filemap_nopage() before the pagetable wiping operation starts. On Tue, May 13, 2003 at 06:28:20PM -0500, Dave McCracken wrote: > So why isn't that the right way to do it? Waiting for mmap_sem guarantees > we won't catch a page fault in flight, which is the cause of the problem in > the first place. Oh it works fine, it's just the explanation for why it's sufficient I was looking for. -- wli -- 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: aart@kvack.org