On (02/01/16 10:45), Byungchul Park wrote:
> But avoiding an unnecessary recursive cycle is better than panic(). What I
> handled
> in this patch is the warning case which causes unnecessary lockup and don't
> need to
> happen.
Hello,
correct, that was one of the reasons why I proposed to
return back to discussion. it's a bit hard to tell if
we have any chance to survive a "lockup suspected"
spin_dump() recursion; even if we have one, it's a race
spin_unlock on CPUA vs. stack overflow on CPUB. we can
be more certain with ->magic mismatch, for example, but
"lockup suspected" is tricky.
-ss
