[sgen] Don't increase degraded_mode in alloc_degraded().

Mature allocation uses the degraded allocation machinery to allocate
objects in the major space.  Modifying degraded_mode in those cases
will actually put us into degraded mode which slows us down immensely.

diff --git a/mono/metadata/sgen-gc.c b/mono/metadata/sgen-gc.c
index b48baae2f0431bfae5af4c1e92e9aa97ec2cafc4..89235c670e5e253987051392e6dfed4e3a877e83 100644 (file)
--- a/mono/metadata/sgen-gc.c
+++ b/mono/metadata/sgen-gc.c
@@ -3564,7 +3564,6 @@ alloc_degraded (MonoVTable *vtable, size_t size)
                mono_profiler_gc_event (MONO_GC_EVENT_END, 1);
        }
 
-       degraded_mode += size;
        return major_collector.alloc_degraded (vtable, size);
 }