On 15/09/2020 21:24, Linus Torvalds wrote:
On Tue, Sep 15, 2020 at 12:01 PM Matthieu Baerts
<matthieu.baerts@xxxxxxxxxxxx> wrote:
>
I forgot one important thing, I was on top of David Miller's net-next
branch by reflex. I can redo the traces on top of linux-next if needed.
Not likely an issue.
I'll go stare at the page lock code again to see if I've missed
anything. I still suspect it's a latent ABBA deadlock that is just
much *much* easier to trigger with the synchronous lock handoff, but I
don't see where it is.
I guess this is all fairly theoretical since we apparently need to do
that hybrid "limited fairness" patch anyway, and it fixes your issue,
but I hate not understanding the problem.
I understand :)
Thank you again for looking at this issue!
Cheers,
Matt
--
Tessares | Belgium | Hybrid Access Solutions
www.tessares.net
