On Mon, Jun 03, 2013 at 11:47:17AM +0200, Stefan Seyfried wrote: > Am 20.05.2013 18:01, schrieb Frederic Weisbecker: > > While computing the cputime delta of dynticks CPUs, > > we are mixing up clocks of differents natures: > > [...] > > > As a consequence, some strange behaviour with unstable tsc > > has been observed such as non progressing constant zero cputime. > > (The 'top' command showing no load). > > This happens for example on my trusty ThinkPad X200s (family 6 model 23 > stepping 10 Core 2 duo), seriously confusing its user (me :-). > > > Fix this by only using local_clock(), or its irq safe/remote > > equivalent, in vtime code. > > > > Reported-by: Mike Galbraith <efa...@gmx.de> > > Suggested-by: Mike Galbraith <efa...@gmx.de> > > Cc: Steven Rostedt <rost...@goodmis.org> > > Cc: Paul E. McKenney <paul...@linux.vnet.ibm.com> > > Cc: Ingo Molnar <mi...@kernel.org> > > Cc: Thomas Gleixner <t...@linutronix.de> > > Cc: Peter Zijlstra <pet...@infradead.org> > > Cc: Borislav Petkov <b...@alien8.de> > > Cc: Li Zhong <zh...@linux.vnet.ibm.com> > > Cc: Mike Galbraith <efa...@gmx.de> > > Signed-off-by: Frederic Weisbecker <fweis...@gmail.com> > > FWIW: > Tested-by: Stefan Seyfried <seife+...@b1-systems.com> > > This patch fixes the 0% CPU issue on openSUSE Factory kernels for me.
Thanks! The patch has been committed already so I can't add your Tested-by: but feedbacks on testing are always appeciated. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
