From mboxrd@z Thu Jan 1 00:00:00 1970 From: Miklos Szeredi Subject: Re: overlayfs patches for ovl_copy_up & ovl_rename Date: Thu, 19 May 2011 10:49:31 +0200 Message-ID: <87zkmjxeg4.fsf@tucsk.pomaz.szeredi.hu> References: <201105041659.38427.jordipujolp@gmail.com> <201105180944.35027.jordipujolp@gmail.com> <87zkmkmmb6.fsf@tucsk.pomaz.szeredi.hu> <201105190947.17303.jordipujolp@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linux-fsdevel@vger.kernel.org To: Jordi Pujol Return-path: Received: from mail-bw0-f46.google.com ([209.85.214.46]:59015 "EHLO mail-bw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753944Ab1ESIt0 (ORCPT ); Thu, 19 May 2011 04:49:26 -0400 Received: by bwz15 with SMTP id 15so2162406bwz.19 for ; Thu, 19 May 2011 01:49:24 -0700 (PDT) In-Reply-To: <201105190947.17303.jordipujolp@gmail.com> (Jordi Pujol's message of "Thu, 19 May 2011 09:47:16 +0200") Sender: linux-fsdevel-owner@vger.kernel.org List-ID: Jordi Pujol writes: > A Dimecres 18 Maig 2011 10:42:53, Miklos Szeredi va escriure: >> Documentation/filesystems/directory-locking >> >> for all the gory details. > > ok, i'll look this, > >> So, is there a minimal test case that I can try to replicate the bad >> behavior? > > it's an occasional error, occurs when the system is occupied > processing diverse tasks at the same time, for example when startpar > is running in parallel the initialization of system daemons, this is > detected because some changes done by the same daemon program are > lost, (the case of consecutive sed instructions) This file, which modifications are lost, is this on the upper filesystem, the lower filesystem or both, before the modification? And after the modification? > or when doing a big > upgrade of the system packages, some files are lost. How are they lost? They don't exist when they should? What's the contents of the upper and lower filesystems? Thanks, Miklos