On Thu, Oct 09, 2014 at 11:07:04AM +0800, zhangzhiqiang wrote: > On 2014/10/8 21:38, Will Deacon wrote: > > On Wed, Oct 08, 2014 at 02:31:47PM +0100, gre...@linuxfoundation.org wrote: > >> On Wed, Oct 08, 2014 at 10:17:41AM +0100, Will Deacon wrote: > >>> On Wed, Oct 08, 2014 at 04:06:12AM +0100, zhangzhiqiang wrote: > >>>> hi all, > >>>> ---------------------------------------- > >>>> > >>>> ref-cycles event is specially to Intel core, but can still used in arm > >>>> architecture > >>>> with the wrong return value with 3.10 stable. for instance: > >>>> > >>>> perf stat -e ref-cycles sleep 1 > >>>> > >>>> Performance counter stats for 'sleep 1': > >>>> > >>>> 0 ref-cycles > >>>> > >>>> 1.002381916 seconds time elapsed > >>>> > >>>> this patch fix the bug and make it return NOT SUPPORTED > >>>> distinctly. > >>>> > >>>> In upstream this bug has been fixed by other way(not primary for the > >>>> bug), which changes more than one file > >>>> and more than 1000 lines. the primary commit is > >>>> 6b7658ec8a100b608e59e3cde353434db51f5be0. > >>>> besides we can not simply cherry-pick. > >>> > >>> I thought I saw Greg pick this up the other day? > >> > >> Yes, it's in 3.16.4, did I do something wrong by accepting it? > > > > Nah, it's a trivial patch that I struggle to get excited about. I'm just not > > sure why it's being sent again, after you already accepted it. > > Yes, it's in 3.16.4, in my opinion 3.10 need it too, can we put it into 3.10 > or > do we have the plan?
Does it apply to 3.10-stable? Did you test it there and see if it resolves your issue? thanks, greg k-h -- 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/