panic: wm_page_unwire

[Dmitry Sivachenko]

> On 20 июня 2015 г., at 13:01, Konstantin Belousov <kostikbel at gmail.com> wrote:
> 
> 
> I was able to reproduce something related, this may be very well your
> problem.  Take the attached program.  Select a scratch file on UFS mount
> point, say x.  Run the following commands:
> mlock_modify x&
> dd if=/dev/zero of=x bs=1 count=1
> fg
> ^C <- system might panic at this point, if buffers are in short supply
> dd if=/dev/zero of=x bs=1 count=1 <- at this point, the system must panic


Yes, that is exactly two cases when I was able to reproduce a panic, so it is apparently my issue.

I tried your patch and I can confirm that it does fix the problem.

Thanks!