Messages in this thread | | | Date | Tue, 5 Jul 2011 15:49:25 +0200 | From | Frederic Weisbecker <> | Subject | Re: [PATCH 2/6] hw_breakpoints: Migrate breakpoint conditional build under new config |
| |
On Mon, Jul 04, 2011 at 11:14:16PM +0530, K.Prasad wrote: > On Mon, Jul 04, 2011 at 03:29:14PM +0200, Frederic Weisbecker wrote: > > On Mon, Jul 04, 2011 at 06:57:46PM +0530, K.Prasad wrote: > > > On Tue, May 24, 2011 at 11:52:23PM +0200, Frederic Weisbecker wrote: > > > > Migrate conditional hw_breakpoint code compilation under > > > > the new config to prepare for letting the user chose whether > > > > or not to build this feature > > > > > > > > > > Making the hardware breakpoint patches modular has always been a goal. > > > I've looked at the PowerPC parts of the code and they look harmless. > > > > > > Acked-by: K.Prasad <prasad@linux.vnet.ibm.com> > > > > Great! > > > > I'll push that soon, thanks guys for your acks! > > Meanwhile, I was testing hardware breakpoints through perf and found > that monitoring a given address fails when using 'perf record' (returns > -ENOSPC) while 'perf stat' and watchpoint through gdb works fine (see > logs below). > > Has this behaviour been reported for other perf counters?
Nope I haven't anything like that. What I reported privately to you a few ago was actually due to a mistake of mine. Otherwise I haven't seen other problems.
-ENOSPC is likely related to the breakpoint slot reservation, in kernel/events/hw_breakpoint.c
| |