freebsd stable - Aug 2008 - recent regression with REL7 and Zfs

Hello,

I am using a recent 7.0-Stable (x86) and a Zfs pool for my data.

After the dtrace import, I have updated my sources (and make buildworld, make 
buildkernel) and I no longer have access to my Zfs pool (just to be sure, I 
have since updated twice more to work around the announced issues).

With the new kernel, the Zpool is listed as "failed" (bad checksum ?).

Reverting to the old kernel is sufficient to recover the Zfs pool (which was 
scrubed last week), and it is declared healthy.

	cheers and thanks for the good work

	TfH

Thierry Herbelot wrote:
> Hello,
> 
> I am using a recent 7.0-Stable (x86) and a Zfs pool for my data.
> 
> After the dtrace import, I have updated my sources (and make buildworld,
make
> buildkernel) and I no longer have access to my Zfs pool (just to be sure, I
> have since updated twice more to work around the announced issues).
Probably same problem here:

With new kernel (7.1-PRERELEASE) and a root file system under zfs, the 
root can't be mounted and system stop with

message saying can't mount zfs:pool0

Manual root filesystem specification:
   <fstype>:<device>  Mount <device> using filesystem
<fstype>
                        eg. ufs:da0s1a
   ?                  List valid disk boot devices
   <empty line>       Abort manual input

mountroot>

I revert to previous kernel and all is OK now.

Henri
> 
> With the new kernel, the Zpool is listed as "failed" (bad
checksum ?).
> 
> Reverting to the old kernel is sufficient to recover the Zfs pool (which
was
> scrubed last week), and it is declared healthy.
> 
> 	cheers and thanks for the good work
> 
> 	TfH
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