On Mon, Sep 24, 2012 at 09:54:00PM +0000, Paul Walmsley wrote: > On Sat, 22 Sep 2012, Paul E. McKenney wrote: > > > On Sat, Sep 22, 2012 at 10:20:19PM +0000, Paul Walmsley wrote: > > > On Sat, 22 Sep 2012, Paul E. McKenney wrote: > > > > > > > This thing has been in the kernel since about 2004, not sure why you > > > > didn't hit it earlier. > > > > > > One other data point in that regard - noticed the warnings don't appear > > > when the board is booted with: > > > > > > commit 4fa3b6cb1bc8c14b81b4c8ffdfd3f2500a7e9367 > > > Author: Paul E. McKenney <paul.mckenney@xxxxxxxxxx> > > > Date: Tue Jun 5 15:53:53 2012 -0700 > > > > > > rcu: Fix qlen_lazy breakage > > > > You lost me on this one. This is already in mainline, so if you were > > using (say) 3.6-rc6, you would already have this commit applied. > > If I check out a kernel at this commit > 4fa3b6cb1bc8c14b81b4c8ffdfd3f2500a7e9367 + the > zero-callback-in-tickless-idle diagnostic patch, build and boot it, then > the stall warnings don't appear (in 25 minutes of testing). > > Messages from the diagnostic patch indicate that the kernel is entering > idle during a grace period with no RCU callbacks, though. > > This is not a big deal and does not need any further attention. Just > wanted to place a time boundary on the point when these messages started > appearing. (It is unlikely to be an optimal bound: i.e., there are > probably later commits where the warnings also don't appear.) Ah, got it, thank you! Thanx, Paul -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
