Re: crash in timerfd building pandoc / ghc94 related

[PHO <pho%cielonegro.org@localhost>]

Committed a workaround to lang/ghc94. I hope it can avoid the panic. You 
can remove the workaround simply by deleting lang/ghc94/hacks.mk.


On 2/7/23 12:36 AM, Greg Troxel wrote:
> PHO <pho%cielonegro.org@localhost> writes:
>
> > On 2/6/23 5:27 PM, Nikita Ronja Gillmann wrote:
> > > I encountered this on some version of 10.99.2 and last night again on
> > > 10.99.2 from Friday morning.
> > > This is an obvious blocker for me for making 9.4.4 the default.
> > > I propose to either revert to the last version or make the default GHC
> > > version setable.
> >
> > I wish I could do the latter, but unfortunately not all Haskell
> > packages are buildable with 2 major versions of GHC at the same time
> > (most are, but there are a few exceptions).
> >
> > Alternatively, I think I can patch GHC 9.4 so that it won't use
> > timerfd. It appears to be an optional feature after all; if its
> > ./configure doesn't find timerfd it won't use it. Let me try that.
>
> If it's possible to only do this on NetBSD 10.99, that would be good.

Yeah I did exactly that.


> It seems so far, from not really paying attention, that there is nothing
> wrong with ghc but that there is a bug in the kernel.   It would also
> be good to get a reproduction recipe without haskell.

Yes of course no userland code should be able to crash the kernel :D