X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=rts%2FThreadPaused.c;fp=rts%2FThreadPaused.c;h=2a3f3559966006b2435c526b93352a741ce75da5;hb=b15b4a179922b1d9fe34c33ee15a25d515d56367;hp=674d0d9ca37cee622ef7cb23bb3ecf18edb95dae;hpb=db12b8eaab53788cf29c589beca82511e48249e4;p=ghc-hetmet.git

diff --git a/rts/ThreadPaused.c b/rts/ThreadPaused.c
index 674d0d9..2a3f355 100644
--- a/rts/ThreadPaused.c
+++ b/rts/ThreadPaused.c
@@ -195,6 +195,10 @@ threadPaused(Capability *cap, StgTSO *tso)
     maybePerformBlockedException (cap, tso);
     if (tso->what_next == ThreadKilled) { return; }
 
+    // NB. Blackholing is *not* optional, we must either do lazy
+    // blackholing, or eager blackholing consistently.  See Note
+    // [upd-black-hole] in sm/Scav.c.
+
     stack_end = &tso->stack[tso->stack_size];
     
     frame = (StgClosure *)tso->sp;