From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sc8-sf-mx1-b.sourceforge.net ([10.3.1.11] helo=sc8-sf-mx1.sourceforge.net) by sc8-sf-list1.sourceforge.net with esmtp (Cipher TLSv1:DES-CBC3-SHA:168) (Exim 3.31-VA-mm2 #1 (Debian)) id 1ANcCL-0000YR-00 for ; Sat, 22 Nov 2003 10:09:33 -0800 Received: from smtp001.mail.ukl.yahoo.com ([217.12.11.32]) by sc8-sf-mx1.sourceforge.net with smtp (Exim 4.24) id 1ANcCJ-0006iK-JI for user-mode-linux-devel@lists.sourceforge.net; Sat, 22 Nov 2003 10:09:31 -0800 From: BlaisorBlade Subject: Re: [uml-devel] Host panic when UML reads host /dev/shm References: <200311201915.29188.blaisorblade_spam@yahoo.it> <200311202037.14480.blaisorblade_spam@yahoo.it> <200311210222.hAL2Mt4L004145@ccure.user-mode-linux.org> In-Reply-To: <200311210222.hAL2Mt4L004145@ccure.user-mode-linux.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Disposition: inline Message-Id: <200311221912.44945.blaisorblade_spam@yahoo.it> Sender: user-mode-linux-devel-admin@lists.sourceforge.net Errors-To: user-mode-linux-devel-admin@lists.sourceforge.net List-Help: List-Post: List-Subscribe: , List-Id: The user-mode Linux development list List-Unsubscribe: , List-Archive: Date: Sat, 22 Nov 2003 19:12:44 +0100 Content-Transfer-Encoding: quoted-printable To: user-mode-linux-devel@lists.sourceforge.net Alle 03:22, venerd=EC 21 novembre 2003, Jeff Dike ha scritto: > blaisorblade_spam@yahoo.it said: > > I think hostfs reads files just as any normal process on the host, > > right? Or it does anything special or at least unusual? > > Nothing unusual, just normal file IO. > > > Could the unusual thing be the context switching of SKAS? I'll test if > > it happens within TT mode. > > I doubt there's any difference. Hmmm... maybe the VM code handling this does some VM assumption... false wi= th=20 SKAS. And then, I saw that mm/shmem.c, to create shared memory, creates an = "unlinked file under tmpfs"(quote from a function description I read there)= .=20 And maybe, there are even other operations which could, then, be relevant=20 here. Does UML uses shared memory? Or maybe just threading could be the issue? --=20 cat <