behlendorf
commented
8 years ago @OrdinaryMagician I'm sorry to hear you've run in to problems. The good news is that based on the backtrace and the fact that you were able to import the pool it appears to be intact. But before starting to debug this further I suggest you make a backup of your data by booting in to a rescue image and importing the pool read-only. You should be able to copy off all of your data somewhere safe.
zpool import -o readonly=on <pool>Once that's done you can either just recreate the pool and copy the data back, or we can debug this further by building a debug version of ZFS and enabling some additional logging.
To build a debug version you'll want to start from source as follows (roughly).
$ git clone https://github.com/zfsonlinux/spl.git
$ git clone https://github.com/zfsonlinux/zfs.git
$ cd spl
$ ./autogen.sh
$ ./configure --enable-debug
$ make -s -j$(nproc)
$ cd ../zfs
$ ./autogen.sh
$ ./configure --enable-debug --with-spl=<path to spl> --with-spl-obj=<path to spl>
$ make -s -j$(nproc)At this point you'll be able to load the debug modules by running scripts/zfs.sh in the ZFS source tree. You'll also be able to to execute the zfs, zpool, zdb commands directly from the ZFS source tree. So go ahead and load the debug modules and then import the pool. This time you may see an VERIFY error on the console before it panics which should give us some additional information and we can go from there enabling adding logging as needed.
tuxoko
OrdinaryMagician
ryao
mstromb
Today I was just installing system updates as usual when all of a sudden my entire system froze. Naturally I rebooted and when I came back, I was greeted by a kernel oops (which I couldn't do anything about because it interrupted the boot process entirely). I decided to boot into systemrescuecd and check it out, and noticed the oops would show up again if I tried to mount my root filesystem. I lost two weeks of work rolling back to a snapshot and tried again. Same thing happened.
I've managed to isolate the oops message, though, and saved it to a file on an usb stick.
It will happen every single time. During the updates it suddenly gets stuck after a few packages, and most running programs just freeze. I've scrubbed the pool just in case, but there are no errors whatsoever.
I will help in any way I can to have this fixed. My only computer is now unusable due to this issue.