From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Darcy Subject: Re: [Gluster-devel] regressions due to 64-bit ext4 directory cookies Date: Thu, 28 Mar 2013 15:43:48 -0400 Message-ID: <51549D74.1060703@redhat.com> References: <20130213224720.GE5938@thunk.org> <20130213230511.GW14195@fieldses.org> <20130213234430.GF5938@thunk.org> <5151BD5F.30607@itwm.fraunhofer.de> <5151C33E.2070008@redhat.com> <20130328140744.GA4989@thunk.org> <20130328175205.GD16651@lenny.home.zabbo.net> <20130328183153.GG7080@fieldses.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: "J. Bruce Fields" , Eric Sandeen , linux-nfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, "Theodore Ts'o" , Zach Brown , Bernd Schubert , linux-ext4-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, gluster-devel-qX2TKyscuCcdnm+yROfE0A@public.gmane.org To: Anand Avati Return-path: In-Reply-To: Sender: linux-nfs-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-ext4.vger.kernel.org On 03/28/2013 02:49 PM, Anand Avati wrote: > Yes, it should, based on the theory of how ext4 was generating the > 63bits. But Jeff's test finds that the experiment is not matching the > theory. FWIW, I was able to re-run my test in between stuff related to That Other Problem. What seems to be happening is that we read correctly until just after d_off 0x4000000000000000, then we suddenly wrap around - not to the very first d_off we saw, but to a pretty early one (e.g. 0x0041b6340689a32e). This is all on a single brick, BTW, so it's pretty easy to line up the back-end and front-end d_off values which match perfectly up to this point. I haven't had a chance to ponder what this all means and debug it further. Hopefully I'll be able to do so soon, but I figured I'd mention it in case something about those numbers rang a bell. -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html