> On 19 ???? 2015 ?., at 22:57, Dmitry Sivachenko <trtrmitya at
gmail.com> wrote:
>
> Hello,
>
> got this panic today on my 10.1-STABLE #0 r279956 box:
>
> <Screen Shot 2015-06-19 at 22.52.57.png>
Well, I tracked this down a bit. Rather easy way to panic -stable box (mine is
r279956), but I can't reliably reproduce this.
It happens when there is a process running which mmap()+mlock() some file, and
while it is running this file is modified on disk
(not rm+mv, but open the same file, truncate and write some other data into it).
After process exits, system will panic with high probability.
So far I got 2 cases:
1) run process which mlock()'s a file; modify that file; stop process and
system panics
2) run process which mlock()'s a file; modify that file; stop process [no
panic so far]; modify that file again and system panics.
Panic message is the same: panic: vm_page_unwire: page <xxxx>'s wire
count is zero