This libgo patch disables memory profiling in one of the tests of the garbage collector. This test measures the amount of memory allocated after a loop that allocates and then forgets about a large number of large slices. The test was failing on PPC64 GNU/Linux because that system uses a much larger page size, causing the blocks allocated by the memory profiler to push up system memory usage. This change disables the memory profiler, since it is irrelevant to the test. Ran Go testsuite on x86_64-unknown-linux-gnu and powerpc64-unknown-linux-gnu. Committed to mainline and 4.7 branch.
Ian
diff -r f50948ccba19 libgo/go/runtime/gc_test.go --- a/libgo/go/runtime/gc_test.go Thu Apr 19 21:54:17 2012 -0700 +++ b/libgo/go/runtime/gc_test.go Fri Apr 20 11:37:32 2012 -0700 @@ -15,6 +15,8 @@ runtime.ReadMemStats(memstats) sys := memstats.Sys + runtime.MemProfileRate = 0 // disable profiler + itercount := 1000000 if testing.Short() { itercount = 100000