Hi, Yurii Kolesnykov > -----Original Message----- > From: Yurii Kolesnykov [mailto:yuriko...@gmail.com] > Sent: Wednesday, August 26, 2015 5:44 PM > To: Zhao Lei <zhao...@cn.fujitsu.com>; 'Chris Murphy' > <li...@colorremedies.com>; 'Btrfs BTRFS' <linux-btrfs@vger.kernel.org> > Cc: 'Qu Wenruo' <quwen...@cn.fujitsu.com> > Subject: Re: [BUG] kernel BUG at fs/btrfs/scrub.c:1956!, when scrubbing > freshly converted ext4 > > Hi, Zhao Lei > > > > > I reproduced above bug too, with following command: > > mkfs.ext4 /dev/vdh > > btrfs-convert /dev/vdh > > mount /dev/vdh /mnt/tmp1 > > btrfs scrub start -B /dev/vdh > > (panic) > > > > The reason is: > > 1: In some case, metadata(leaf) created by btrfs-convert was split into 2 > strips. > > 2: Then scrub bypassed part of leaf data, and left data caused panic in > > scrub_checksum_tree_block(). > > > > For above 1: > > we can get following information after some simple operation. > > a. mkfs.ext4 /dev/vdh > > btrfs-convert /dev/vdh > > b. btrfs-debug-tree /dev/vdh > > we can see following item in extent tree: > > item 25 key (27054080 METADATA_ITEM 0) itemoff 15083 itemsize 33 > > Its logical address is [27054080, 27070464) > > and acrossed 2 strips: > > [27000832, 27066368) > > [27066368, 27131904) > > Qu Wenruo <quwen...@cn.fujitsu.com> is fixing above problem. > > > > For above 2: > > scrub is trying to do a "bypass" in this case, but the result is "panic". > > I'll fix it. > > > > Thanks > > Zhaolei > > Could you please share an update on this bug status?
Above 1 is fixed in patch titled: [PATCH] btrfs: Fix scrub panic when leaf accross stripes in btrfs maillist. This patch is in integration-4.3 branch, and will be merged into linux 4.3. For above 2, it is fixed by Qu Wenruo <quwen...@cn.fujitsu.com>, patch set is btrfs maillist named: [PATCH 0/4] Metadata crossing stripe boundary fixes ... These patch are already in new version of btrfs-progs now. > Also, please use bugzilla. I failed to close the bug in Bugzilla, maybe no permission, or oher problem for newbee as I. Maybe 'Chris Murphy' <li...@colorremedies.com> can close it. Thanks Zhaolei -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
