From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from acsinet15.oracle.com ([141.146.126.227]:23680 "EHLO acsinet15.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753643Ab2IUDxe (ORCPT ); Thu, 20 Sep 2012 23:53:34 -0400 Message-ID: <505BE4AF.60809@oracle.com> Date: Fri, 21 Sep 2012 11:53:19 +0800 From: Liu Bo MIME-Version: 1.0 To: Marc MERLIN CC: linux-btrfs@vger.kernel.org Subject: Re: kernel BUG at fs/btrfs/extent_io.c:1884! References: <20120920171747.GG26105@merlins.org> <20120921034652.GA871@merlins.org> In-Reply-To: <20120921034652.GA871@merlins.org> Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-btrfs-owner@vger.kernel.org List-ID: On 09/21/2012 11:46 AM, Marc MERLIN wrote: > On Thu, Sep 20, 2012 at 10:17:47AM -0700, Marc MERLIN wrote: >> I had a btrfs built on top of 5 drives (dmcrypt devices). >> >> The drive then died while I was writing to the filesystem and my system >> crashed and rebooted: >> >> [384555.534020] sd 10:0:0:0: rejecting I/O to offline device >> [384555.535057] sd 10:0:0:0: rejecting I/O to offline device >> [384556.666885] ------------[ cut here ]------------ >> [384556.667909] sd 10:0:0:0: [sdj] Synchronizing SCSI cache >> [384556.677509] kernel BUG at fs/btrfs/ctree.c:3451! >> [384556.682551] invalid opcode: 0000 [#1] PREEMPT SMP >> [384556.687878] CPU 2 >> > > Oh my, now I'm trying again with a new drive, and a big cp from an > existing array to a new one dies with: > [32042.079411] ------------[ cut here ]------------ > [32042.085799] kernel BUG at fs/btrfs/extent_io.c:1884! > [32042.092528] invalid opcode: 0000 [#1] PREEMPT SMP > [32042.099227] CPU 1 > [32042.101095] Modules linked in:[32042.105950] raid456 async_raid6_recov async > _pq raid6_pq async_xor xor async_memcpy async_tx ppdev lp tun autofs4 kl5kusb105 > ftdi_sio keyspan nfsd nfs lockd fscache auth_rpcgss nfs_acl sunrpc rc_ati_x10 s > nd_timer i915 usbserial snd drm_kms_helper eeepc_wmi drm ati_remote asus_wmi rc_ > core sparse_keymap > > int repair_io_failure(struct btrfs_mapping_tree *map_tree, u64 start, > u64 length, u64 logical, struct page *page, > int mirror_num) > { > struct bio *bio; > struct btrfs_device *dev; > DECLARE_COMPLETION_ONSTACK(compl); > u64 map_length = 0; > u64 sector; > struct btrfs_bio *bbio = NULL; > int ret; > > BUG_ON(!mirror_num); <<<<< > > This is more of a problem since I can't backup my filesystem (source is > ext4 and destination is btrfs). > > Any suggestion on what went wrong here? > Could you please show us the complete stack info? thanks, liubo > Thanks, > Marc >