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 1BPkBi-0005du-53 for user-mode-linux-devel@lists.sourceforge.net; Mon, 17 May 2004 08:37:58 -0700 Received: from zrc2s0jx.nortelnetworks.com ([47.103.122.112]) by sc8-sf-mx2.sourceforge.net with esmtp (Exim 4.30) id 1BPkBg-0001pC-A6 for user-mode-linux-devel@lists.sourceforge.net; Mon, 17 May 2004 08:37:56 -0700 Message-ID: <40A8DC43.5060001@nortelnetworks.com> From: Joe Marzot MIME-Version: 1.0 References: <200405122208.i4CM8cCe008920@ccure.user-mode-linux.org> <40A3E217.2080104@nortelnetworks.com> <200405140143.i4E1hWZB005226@ccure.user-mode-linux.org> <40A4B26F.8080507@nortelnetworks.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Subject: [uml-devel] 2.4.24-2 UML problems with hostfs ClearCase mounts [ was Re: [uml-devel] uml-patch-2.4.24-3] 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, 17 May 2004 11:37:39 -0400 To: Jeff Dike Cc: user-mode-linux-devel@lists.sourceforge.net A little more data on this one - the behaviour I see with these mounts is that mount -t hostfs none /mnt/mybob -o /view/myview/vob/myvob succeeds but mounts the hosts / dir instead of the desired view extended pathname of the ClearCase vob. very strange - 2.4.24-1 patch seems to work fine with these Clearcase host filesystems. I tries with 2.4.24-3 but did not even get it too boot but this is likely some other issue. regards, GSM Joe Marzot wrote: > Jeff Dike wrote: > >> gmarzot@nortelnetworks.com said: >> >>> I wonder based on what you say here if two UMLs that hostfs mount the >>> same directory and access the same file...one for reading, and the >>> other for writing, if the first will see the updates written by the >>> second....or maybe I am misinterpretting. >> >> >> >> You are correct, the writer will cache the new data, and the reader >> won't see >> it until it's flushed out somehow. If you can arrange to have the >> writer sync the filesystem before the reader reads the files, then it >> will get up-to-date information. >> >> Otherwise, if this is a problem, we need to make hostfs optionally >> synchronous. > > > Yes - I think there is value in that. > > On a different but related topic. I am trying the 2.4.24-2 patch to see > if it helps with the kernel panics I posted about in a previous thread > but I am now seeing some odd failures with hostfs. Granted my seetup is > a bit odd (i.e., atypical). > > I am mounting Clearcase vobs using view extended pathnames. I have a > little script that mounts a whole series of Clearcase vobs...after the > script some are mounted and some are not...Clearcase implements these > view extended pathnames as a virtual filsystem (mvfs) and there must be > something about that which makes the mounting fail > occasionally...mouinting other host filesystems works as before. note: > mounting the CC mvfs vobs worked in 2.4.24-1 with no problem. > > I will try again with 2.4.24-3 (w/ fsync - hopefully I can find the > right place(s)) and report on that... > > regards, GSM > >> >> Jeff >> >> > > > ------------------------------------------------------- This SF.Net email is sponsored by: SourceForge.net Broadband Sign-up now for SourceForge Broadband and get the fastest 6.0/768 connection for only $19.95/mo for the first 3 months! http://ads.osdn.com/?ad_id=2562&alloc_id=6184&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