From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from plane.gmane.org ([80.91.229.3]:41268 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965455AbbJ1Mql (ORCPT ); Wed, 28 Oct 2015 08:46:41 -0400 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1ZrQ7h-0003IQ-1Z for linux-btrfs@vger.kernel.org; Wed, 28 Oct 2015 13:46:37 +0100 Received: from ip98-167-165-199.ph.ph.cox.net ([98.167.165.199]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 28 Oct 2015 13:46:37 +0100 Received: from 1i5t5.duncan by ip98-167-165-199.ph.ph.cox.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 28 Oct 2015 13:46:37 +0100 To: linux-btrfs@vger.kernel.org From: Duncan <1i5t5.duncan@cox.net> Subject: Re: random i/o error without error in dmesg Date: Wed, 28 Oct 2015 12:46:22 +0000 (UTC) Message-ID: References: <562E0D31.2080003@dblaci.hu> <5339076.FcC2BAjqs5@thetick> <56308ADC.5060207@dblaci.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-btrfs-owner@vger.kernel.org List-ID: Szalma László posted on Wed, 28 Oct 2015 09:44:12 +0100 as excerpted: > The umount/mount ALWAYS solved the problem for me, mount -o remount,ro > was tried for the first time, but it was not enought. Reboot was not > needed. > (kernel 4.2.4) So that means it's filesystem state that's tracked thru a remount, not something like deleted/orphan files that a remount should square away. But a full unmount clears the state, without having to unload the btrfs kernel module or reboot. Which at least limits the active zone of the problem. Unfortunately, I'm not a dev and don't have a clue where to go from there... unless it's related to the recent delayed-refs bug, in which case I believe a late 4.3 rc, or 4.3.0 when released, should fix it. That fix should be CCed to stable and thus appear there eventually, but I normally track pre- releases, not stable, so don't know how long it might be... And again, I don't know it's even related, but it does appear to be the active bug of the moment, so in the absence of knowing, one can hope. -- Duncan - List replies preferred. No HTML msgs. "Every nonfree program has a lord, a master -- and if you use the program, he is your master." Richard Stallman