BTW. two years ago, I reported a bug that userspace programs on sparc64 would randomly crash in a few hours with preempt enabled ( http://marc.info/?l=linux-sparc&m=121222607414906&w=4 ) Now I tried the same workload with 2.6.35 and it is stable with preempt. Are you aware that the bug was fixed? Or if not, it may be still lurking there and some unrelated change hid the race condition. Should I bisect the kernel to find out which patch actually fixed (or hid) the bug? Mikulas -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html