ZFS v28 is ready for wider testing.

[Josh Paetzel]

On Tuesday 31 August 2010 16:59:15 Pawel Jakub Dawidek wrote:
> Hello.
> 
> I'd like to give you ZFS v28 for testing. If you are neither brave nor
> mad, you can stop here.
> 
> The patchset is very experimental. It can eat your cookie and hurt your
> teddy bear, so be warned. Don't try it for anything except testing.
> 
> This patchset is also a message we, as the FreeBSD project, would like
> to send to our users: Eventhough OpenSolaris is dead, the ZFS file
> system is going to stay in FreeBSD. At this point we have quite a few
> developers involved in ZFS on FreeBSD as well as serveral companies.
> We are also looking forward to work with IllumOS.
> 
> So, what this new ZFS brings?
> 
> - Data deduplication. Read more here:
> 
> 	http://blogs.sun.com/bonwick/entry/zfs_dedup
> 
> - Triple parity RAIDZ (RAIDZ3). Read more here:
> 
> 	http://dtrace.org/blogs/ahl/2009/07/21/triple-parity-raid-z/
> 
> - zfs diff. Read more here:
> 
> 	http://arc.opensolaris.org/caselog/PSARC/2010/105/20100328_tim.haley
> 
> - zpool split. Read more here:
> 
> 	http://arc.opensolaris.org/caselog/PSARC/2009/511/20090924_mark.musante
> 
> - Snapshot holds. Read more here:
> 
> 	http://arc.opensolaris.org/caselog/PSARC/2009/297/20090511_chris.kirby
> 
> - zpool import -F. Allows to rewind corrupted pool to earlier
>   transaction group.
> 
> - Possibility to import pool in read-only mode.
> 
> And much, much more, including plenty of preformance improvements and bug
> fixes.
> 
> So test whatever you can and report back. Look for regressions, strange
> behaviour, missing features, deadlocks, livelocks, preformance
> degradation, etc.
> 
> The boot code is not updated at all, so booting off of ZFS doesn't
> currently work.
> 
> The patch is against today's FreeBSD HEAD.
> 
> The patch enables (in sys/modules/zfs/Makefile) ZFS internal debugging,
> please don't turn it off. Also, compile your kernel with the following
> options:
> 
> 	options 	KDB
> 	options 	DDB
> 	options 	INVARIANTS
> 	options 	INVARIANT_SUPPORT
> 	options 	WITNESS
> 	options 	WITNESS_SKIPSPIN
> 	options 	DEBUG_LOCKS
> 	options 	DEBUG_VFS_LOCKS
> 
> Ignore all the LOR (Lock Order Reversal) reports from WITNESS. There will
> be plenty of those, and you'll desperately want to report them, but please
> don't.
> 
> The best way to report a problem is to answer to this e-mail with as short
> as possible procedure of how to reproduce it and debugging info. I'd
> prefer textdump if possible. Below you can find quick procedure how to
> setup textdumps:
> 
> 	Choose spare/swap disk/partition in your system, let's say it is
> 	/dev/ad0s1b.
> 
> 	Add the following line to /etc/fstab:
> 
> 		/dev/ad0s1b	none	swap	sw	0	0
> 
> 	Add the following line to /etc/rc.conf:
> 
> 		ddb_enable="YES"
> 
> 	Run the following commands:
> 
> 		# /etc/rc.d/swap1 start
> 		# /etc/rc.d/dumpon start
> 		# /etc/rc.d/ddb start
> 
> 	This will setup swap, mark it as dump device and setup some DDB
> 	scripts. Or you can just reboot.
> 
> 	Now when your system panic or deadlock, enter DDB and call the
> 	following command:
> 
> 		ddb> run kdb.enter.panic
> 
> 	It will execute all the commands I need, dump them in text format to
> 	your swap device and reboot machine.
> 
> 	After the reboot, you should find textdump.tar.0 file in /var/crash/
> 	directory. This is the debug info I need.
> 
> End of textdumps procedure.
> 
> Ok, now that I know you read everything carefully, here is the patch:
> 
> 	http://people.freebsd.org/~pjd/patches/zfs_20100831.patch.bz2
> 
> Good luck! >:>

I get the following error from make buildworld after applying the patch.  I 
checked twice to make sure the patch applied cleanly, which it did.  

cc -O2 -pipe -
I/usr/src/cddl/usr.bin/ctfconvert/../../../sys/cddl/compat/opensolaris  -
I/usr/src/cddl/usr.bin/ctfconvert/../../../cddl/compat/opensolaris/include  -
I/usr/src/cddl/usr.bin/ctfconvert/../../../cddl/contrib/opensolaris  -
I/usr/src/cddl/usr.bin/ctfconvert/../../../sys/cddl/contrib/opensolaris  -
I/usr/src/cddl/usr.bin/ctfconvert/../../../cddl/contrib/opensolaris/head  -
I/usr/src/cddl/usr.bin/ctfconvert/../../../cddl/contrib/opensolaris/tools/ctf/common  
-
I/usr/src/cddl/usr.bin/ctfconvert/../../../cddl/contrib/opensolaris/tools/ctf/cvt  
-
I/usr/src/cddl/usr.bin/ctfconvert/../../../sys/cddl/contrib/opensolaris/uts/common 
-DNEED_SOLARIS_BOOLEAN -g -std=gnu89  -Wno-unknown-pragmas -
I/usr/obj/usr/src/tmp/legacy/usr/include  -static -
L/usr/obj/usr/src/tmp/legacy/usr/lib -o ctfconvert alist.o ctf.o ctfconvert.o 
dwarf.o fixup_tdescs.o hash.o iidesc.o input.o list.o memory.o merge.o 
output.o st_parse.o stabs.o stack.o strtab.o symbol.o tdata.o traverse.o 
util.o -lctf -ldwarf -lelf -lz -lpthread -legacy
strtab.o(.text+0x109): In function `strtab_print':
/usr/src/cddl/usr.bin/ctfconvert/../../../cddl/contrib/opensolaris/tools/ctf/cvt/strtab.c:249: 
undefined reference to `MIN'
strtab.o(.text+0x28d): In function `strtab_insert':
/usr/src/cddl/usr.bin/ctfconvert/../../../cddl/contrib/opensolaris/tools/ctf/cvt/strtab.c:119: 
undefined reference to `MIN'
strtab.o(.text+0x3a1):/usr/src/cddl/usr.bin/ctfconvert/../../../cddl/contrib/opensolaris/tools/ctf/cvt/strtab.c:145: 
undefined reference to `MIN'
*** Error code 1
1 error
*** Error code 2
1 error
*** Error code 2
1 error
*** Error code 2
1 error

# uname -a
FreeBSD head.tcbug.org 9.0-CURRENT FreeBSD 9.0-CURRENT #3: Tue Aug 31 16:30:57 
UTC 2010     root at head.tcbug.org:/usr/obj/usr/src/sys/HEAD  amd64

-- 
Thanks,

Josh Paetzel