On Thu, 2010-10-14 at 17:33 +0200, Gerald Schaefer wrote: > From: Gerald Schaefer <gerald.schaefer@xxxxxxxxxx> > > The spinning mutex implementation uses cpu_relax() in busy loops as a > compiler barrier. Depending on the architecture, cpu_relax() may do more > than needed in this specific mutex spin loops. On System z we also give > up the time slice of the virtual cpu in cpu_relax(), which prevents > effective spinning on the mutex. > > This patch replaces cpu_relax() in the spinning mutex code with a new > function mutex_cpu_relax(), which can be defined by each architecture > that selects HAVE_MUTEX_CPU_RELAX. The default is still cpu_relax(), so > this patch should not affect other architectures than System z for now. Sure.. I'll take it. -- To unsubscribe from this list: send the line "unsubscribe linux-s390" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
