Messages in this thread | | | Date | Thu, 19 Dec 2013 11:10:45 -0500 | From | Dave Jones <> | Subject | Re: lockdep: BUG: MAX_LOCKDEP_ENTRIES too low! |
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On Thu, Dec 19, 2013 at 05:01:16PM +0100, Peter Zijlstra wrote: > On Thu, Dec 19, 2013 at 10:59:17AM -0500, Dave Jones wrote: > > On Thu, Dec 19, 2013 at 04:51:21PM +0100, Peter Zijlstra wrote: > > > On Thu, Dec 19, 2013 at 10:39:57AM -0500, Sasha Levin wrote: > > > > That discusses lockdep classes, which is actually fine in my case. I ran out of > > > > MAX_LOCKDEP_ENTRIES, which isn't mentioned anywhere in Documentation/ . > > > > > > Yeah, it suffers from the same problem though. Lockdep has static > > > resource allocation and never frees them. > > > > > > The lock classes are the smallest pool and usually run out first, but > > > the same could happen for the entries, after all, the more classes we > > > have the more class connections can happen. > > > > > > Anyway, barring a leak and silly class mistakes like mentioned in the > > > document there's nothing we can do except raise the number. > > > > I tried this. When you bump it to 32k, it fares better but then you > > start seeing "BUG: MAX_LOCKDEP_CHAINS too low!" instead. > > I've not tried bumping that yet, as I've stopped seeing these lately > > due to hitting more serious bugs first. > > What are you doing to trigger all this? I don't see these. Are you > loading/unloading modules a lot?
syscall fuzzing.
Dave
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