Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755131Ab2HTUwn (ORCPT ); Mon, 20 Aug 2012 16:52:43 -0400 Received: from fieldses.org ([174.143.236.118]:43205 "EHLO fieldses.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751302Ab2HTUwl (ORCPT ); Mon, 20 Aug 2012 16:52:41 -0400 Date: Mon, 20 Aug 2012 16:52:31 -0400 To: Namjae Jeon Cc: OGAWA Hirofumi , Al Viro , akpm@linux-foundation.org, linux-kernel@vger.kernel.org, Namjae Jeon Subject: Re: [PATCH 0/4] fat: fix ESTALE errors Message-ID: <20120820205231.GG5779@fieldses.org> References: <1345282899-7534-1-git-send-email-linkinjeon@gmail.com> <20120818132524.GW23464@ZenIV.linux.org.uk> <87pq6op9zz.fsf@devron.myhome.or.jp> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) From: "J. Bruce Fields" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1494 Lines: 37 On Mon, Aug 20, 2012 at 01:19:51PM +0900, Namjae Jeon wrote: > 2012/8/18, OGAWA Hirofumi : > > Al Viro writes: > > > >> On Sat, Aug 18, 2012 at 05:41:39AM -0400, Namjae Jeon wrote: > >>> From: Namjae Jeon > >>> > >>> This patch-set eliminates the client side ESTALE errors when > >>> a FAT partition exported over NFS has its dentries evicted > >>> from the cache. > >>> > >>> One of the reasons for this error is lack of permanent inode > >>> numbers on FAT which makes it difficult to construct persistent > >>> file handles.This can be overcome by using the on-disk location > >>> of the directory entries (i_pos) as the inode number. > >> > >> The hell it can. You've just made them unstable on rename(2). > > > > As more hint. We can't use i_pos as the inode number. > > > > E.g. inode is unlinked but is still opened (orphaned inode), the dir > > entry is free and you can create the inode on same i_pos. After that, > > both inodes have same i_pos (so inode number). > > > > Thanks. > Hi. Ogawa. > Thanks for specific explanation. I will check it. Fo somebody that knows more about fat than me--is there really any hope of making it play well with nfs? --b. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/