amd64 head -r329465 (non-debug build, but with symbols): "panic: spin lock held too long" during make check-old, reported during a sys_vfork

[Mateusz Guzik]

 I committed the fix in
https://svnweb.freebsd.org/base?view=revision&revision=329542

i.e. should be stable from this point on.

On Sun, Feb 18, 2018 at 11:55 PM, Mateusz Guzik <mjguzik at gmail.com> wrote:

> On Sun, Feb 18, 2018 at 11:24 PM, Trond Endrestøl <
> Trond.Endrestol at fagskolen.gjovik.no> wrote:
>
>> On Sun, 18 Feb 2018 22:33+0100, Mateusz Guzik wrote:
>>
>> > On Sun, Feb 18, 2018 at 9:38 PM, Trond Endrestøl <
>> > Trond.Endrestol at fagskolen.gjovik.no> wrote:
>> >
>> > > On Sun, 18 Feb 2018 11:51-0800, Mark Millard wrote:
>> > >
>> > > > Note: -r329448 was reverted in -r329461 : racy.
>> > >
>> > > True. I got a crash when compiling r329451 while running r329449.
>> > > I've now booted the r329422 ZFS BE and I'm attempting to build
>> > > r329529.
>> > >
>> >
>> > Looking around strongly suggests r329448 is the culprit. If you can
>> verify
>> > 329447 works fine we are mostly done here.
>>
>> I noticed no errors in r329447. When r329529 is built and installed,
>> I'll try to incrementally build and install r329531.
>>
>
> Can you grab a panicking kernel and apply this:
> https://people.freebsd.org/~mjg/wait_unlocked.diff
>
> there may be debug printfs signifying the problem condition was hit,
> however the patch should fix the panic
>
> --
> Mateusz Guzik <mjguzik gmail.com>
>



-- 
Mateusz Guzik <mjguzik gmail.com>