From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Sat, 5 Jun 2004 12:21:35 -0700 (PDT) From: Ron Maeder Subject: Re: mmap() > phys mem problem In-Reply-To: <40B9A855.3030102@yahoo.com.au> Message-ID: References: <40B9A855.3030102@yahoo.com.au> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Sender: owner-linux-mm@kvack.org Return-Path: To: Nick Piggin Cc: Rik van Riel , linux-mm@kvack.org List-ID: Thanks very much for your response. I have had some help trying out the patch and running recent versions of the kernel. The problem is not fixed in 2.6.6+patch or in 2.6.7-rc2. Any other suggestions? Ron On Sun, 30 May 2004, Nick Piggin wrote: > Ron Maeder wrote: >> On Fri, 28 May 2004, Rik van Riel wrote: >> >>> On Tue, 25 May 2004, Ron Maeder wrote: >>> >>>> Is this an "undocumented feature" or is this a linux error? I would >>>> expect pages of the mmap()'d file would get paged back to the original >>>> file. I know this won't be fast, but the performance is not an issue >>>> for >>>> this application. >>> >>> >>> It looks like a kernel bug. Can you reproduce this problem >>> with the latest 2.6 kernel or is it still there ? >>> >>> Rik >> >> >> I was able to reproduce the problem with the code that I posted on a 2.6.6 >> kernel. >> > > Can you give this NFS patch (from Trond) a try please? > > (I don't think it is a very good idea for NFS to be using > WRITEPAGE_ACTIVATE here. If NFS needs to have good write > clustering off the end of the LRU, we need to go about it > some other way.) > > -- 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