Date: Sat, 17 Nov 2012 00:44:26 +0200 From: Andriy Gapon <avg@FreeBSD.org> To: Peter Jeremy <peter@rulingia.com> Cc: freebsd-fs@FreeBSD.org Subject: Re: zfs diff deadlock Message-ID: <50A6C1CA.50508@FreeBSD.org> In-Reply-To: <20121116223544.GA99247@server.rulingia.com> References: <20121110223249.GB506@server.rulingia.com> <20121111072739.GA4814@server.rulingia.com> <509F5E0A.1020501@FreeBSD.org> <20121113202730.GA42238@server.rulingia.com> <20121116223544.GA99247@server.rulingia.com>
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on 17/11/2012 00:35 Peter Jeremy said the following: > On 2012-Nov-14 07:27:30 +1100, Peter Jeremy <peter@server.rulingia.com> > wrote: >> On head, I get some normal differences terminated by: Unable to >> determine path or stats for object 2128453 in tank/beckett/home@20120518: >> Invalid argument > > I've done some more digging and got the following. Does it make sense for > an object that is a "ZFS plain file" to have another "ZFS plain file" as a > parent? It doesn't sound right to me. There was a bug that could result in a problem like this (because of corrupted znode attributes) after certain operations. What version of FreeBSD do you run there (branch+rev) ? > root@FB10-64:~ # zdb -vvv tank/beckett/home@20120518 2128453 Dataset > tank/beckett/home@20120518 [ZPL], ID 605, cr_txg 8379, 143G, 2026419 > objects, rootbp DVA[0]=<0:266a0efa00:200> DVA[1]=<0:31b07fbc00:200> [L0 > DMU objset] fletcher4 lzjb LE contiguous unique double size=800L/200P > birth=8375L/8375P fill=2026419 > cksum=1acdb1fbd9:93bf9c61e94:1b35c72eb8adb:389743898e4f79 > > Object lvl iblk dblk dsize lsize %full type 2128453 1 16K > 1.50K 1.50K 1.50K 100.00 ZFS plain file 264 bonus ZFS znode dnode > flags: USED_BYTES USERUSED_ACCOUNTED dnode maxblkid: 0 path > ???<object#2128453> uid 1000 gid 1000 atime Fri Mar 23 16:34:52 > 2012 mtime Sat Oct 22 16:13:42 2011 ctime Sun Oct 23 21:09:02 2011 > crtime Sat Oct 22 16:13:42 2011 gen 2237174 mode 100444 size 1089 > parent 2242171 links 1 pflags 40800000004 xattr 0 rdev > 0x0000000000000000 > > root@FB10-64:~ # zdb -vvv tank/beckett/home@20120518 2242171 Dataset > tank/beckett/home@20120518 [ZPL], ID 605, cr_txg 8379, 143G, 2026419 > objects, rootbp DVA[0]=<0:266a0efa00:200> DVA[1]=<0:31b07fbc00:200> [L0 > DMU objset] fletcher4 lzjb LE contiguous unique double size=800L/200P > birth=8375L/8375P fill=2026419 > cksum=1acdb1fbd9:93bf9c61e94:1b35c72eb8adb:389743898e4f79 > > Object lvl iblk dblk dsize lsize %full type 2242171 3 16K > 128K 25.4M 25.5M 100.00 ZFS plain file 264 bonus ZFS znode dnode > flags: USED_BYTES USERUSED_ACCOUNTED dnode maxblkid: 203 path > /jashank/Pictures/sch/pdm-a4-11/stereo-pair-2.png uid 1000 gid 1000 > atime Fri Mar 23 16:41:53 2012 mtime Mon Oct 24 21:15:56 2011 ctime > Mon Oct 24 21:15:56 2011 crtime Mon Oct 24 21:15:37 2011 gen 2286679 mode > 100644 size 26625731 parent 7001490 links 1 pflags 40800000004 xattr > 0 rdev 0x0000000000000000 > > root@FB10-64:~ # zdb -vvv tank/beckett/home@20120518 7001490 Dataset > tank/beckett/home@20120518 [ZPL], ID 605, cr_txg 8379, 143G, 2026419 > objects, rootbp DVA[0]=<0:266a0efa00:200> DVA[1]=<0:31b07fbc00:200> [L0 > DMU objset] fletcher4 lzjb LE contiguous unique double size=800L/200P > birth=8375L/8375P fill=2026419 > cksum=1acdb1fbd9:93bf9c61e94:1b35c72eb8adb:389743898e4f79 > > Object lvl iblk dblk dsize lsize %full type 7001490 1 16K > 512 1K 512 100.00 ZFS directory 264 bonus ZFS znode dnode > flags: USED_BYTES USERUSED_ACCOUNTED dnode maxblkid: 0 path > /jashank/Pictures/sch/pdm-a4-11 uid 1000 gid 1000 atime Thu May > 17 03:38:32 2012 mtime Mon Oct 24 21:15:37 2011 ctime Mon Oct 24 > 21:15:37 2011 crtime Fri Oct 14 22:17:44 2011 gen 2088407 mode 40755 > size 6 parent 6370559 links 2 pflags 40800000144 xattr 0 rdev > 0x0000000000000000 microzap: 512 bytes, 4 entries > > stereo-pair-2.png = 2242171 (type: Regular File) stereo-pair-2.xcf = > 7002074 (type: Regular File) stereo-pair-1.xcf = 7001512 (type: Regular > File) stereo-pair-1.png = 2241802 (type: Regular File) > > root@FB10-64:~ # > -- Andriy Gapon
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