HAMMER goes to nirvana

[Andrey Oktyabrskiy]

On 21.09.2014 18:46, Justin Sherrill wrote:
> On Sun, Sep 21, 2014 at 8:20 AM, Andrey Oktyabrskiy <ano at bestmx.net> wrote:
>> My home server cannot mount one of the hammer filesystems. I see 4 kernel
>> messages and OS does not respond any more:
>
> The 'man 5 hammer' page mentions it's possible to turn off redo by
> setting vfs.hammer.skip_redo to 1 (mount despite errors) or 2 (don't
> even try redo).
Thank you, I'll try it when will make backup...

> If that doesn't get anywhere, you can boot to single user mode (one of
> the boot menu options) or boot from a LiveCD/USB image, and try
> mounting the volume then.  If you can get it online, 'hammer show -f
> /dev/thatdrivedevice | grep B' will  I think filter for errors.  See
> man 8 hammer.  I have not tried this directly, so your mileage may
> vary.
Yes, I can't get it online in single user mode too.

I switched to 3.8.2, recompiled world and kernel and can mount that FS! 
So this bug is in the recent -master (compiled yesterday).