tweak the totally-bogus arbitrary stack-squeezing heuristic to fix #2797

[ghc-hetmet.git] / rts / ThreadPaused.c

diff --git a/rts/ThreadPaused.c b/rts/ThreadPaused.c
index 93ec960..75712b0 100644 (file)
--- a/rts/ThreadPaused.c
+++ b/rts/ThreadPaused.c
@@ -315,7 +315,8 @@ end:
     // the number of words we have to shift down is less than the
     // number of stack words we squeeze away by doing so.
     if (RtsFlags.GcFlags.squeezeUpdFrames == rtsTrue &&
-       ((weight <= 5 && words_to_squeeze > 0) || weight < words_to_squeeze)) {
+       ((weight <= 8 && words_to_squeeze > 0) || weight < words_to_squeeze)) {
+        // threshold above bumped from 5 to 8 as a result of #2797
        stackSqueeze(cap, tso, (StgPtr)frame);
         tso->flags |= TSO_SQUEEZED;
         // This flag tells threadStackOverflow() that the stack was