On Thu, Jan 31, 2013 at 9:52 AM, Linus Torvalds <torvalds at linux-foundation.org> wrote: > On Thu, Jan 31, 2013 at 9:19 AM, Russell King <rmk at arm.linux.org.uk> wrote: >> >> So... what you seem to be telling me is that 3.9 is going to be a >> release which issues lockdep complaints when the console blanks, and >> you think that's acceptable? >> >> Adding Linus and Andrew so they're aware of this issue... > > Oh, we're extremely aware of it. And it's not a new issue, the locking > problem have apparently been around forever, although I'm not sure why > the lockdep splat itself started happening only recently. > > They'll make it into 3.9, it's 3.8 that won't have them. The patches > initially caused way *worse* behavior than just a lockdep splat - they > caused actual hard lockups (and that was *after* the initial series of > fixes). That got fixed (hopefully for the last case!) fairly recently, > and I'm not willing to take the scary patch-series that has had > several problem cases.
Well we didn't have any lock validation support before Daniel added it a couple of kernels back, so instead of hidden locking problems we've had from time began, we now have lockdep detectable locking problems. Dave.