Re: Updated performance results

Chris Mason
2009-09-16T18:20:22Z

On Wed, Sep 16, 2009 at 01:16:56PM -0500, Steven Pratt wrote:
> Chris Mason wrote:
> >On Wed, Sep 16, 2009 at 12:57:22PM -0500, Steven Pratt wrote:
> >>Steven Pratt wrote:
> >>>Chris Mason wrote:
> >>>>On Mon, Sep 14, 2009 at 04:41:48PM -0500, Steven Pratt wrote:
> >>>>>Only bit of bad news is I did get one error that crashed the system
> >>>>>on single threaded nocow run. So that data point is missing.
> >>>>>Output below:
> >>>>I hope I've got this fixed. If you pull from the master branch of
> >>>>btrfs-unstable there are fixes for async thread races. The single
> >>>>patch I sent before is included, but not enough.
> >>>Glad you said that. Keeps me from sending the email that said the
> >>>patch didn't help :-)
> >>>
> >>>Steve
> >>Well, still getting oopses even with new code.
> >>
> >>Lots of:
> >>Sep 16 11:07:27 btrfs1 kernel: [ 1862.942754] BUG: soft lockup -
> >>CPU#10 stuck for 61s! [btrfs-endio-1:30250]
> >>Sep 16 11:07:27 btrfs1 kernel: [ 1862.942754] Pid: 30250, comm:
> >>btrfs-endio-1 Not tainted 2.6.31-autokern1 #1 IBM x3950-[88726RU]-
> >>Sep 16 11:07:27 btrfs1 kernel: [ 1862.942754] RIP:
> >>0010:[<ffffffff81153920>] [<ffffffff81153920>] crc32c+0x20/0x26
> >
> >If I'm reading this right, you've got a softlockup in crc32c? Something
> >has gone really wrong here. Are you reusing datasets from old runs?
> From the second machine a single bug:
> Sep 16 11:53:42 btrfs2 kernel: [ 3769.298240] ------------[ cut here

Ok, which mount options and job file is this from?

-chris