Messages in this thread | | | Date | Sun, 15 Mar 2009 10:47:04 +0100 | From | Ingo Molnar <> | Subject | Re: SLOB lockup (was: Re: [tip:core/locking] lockdep: annotate reclaim context (__GFP_NOFS), fix SLOB) |
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* Nick Piggin <nickpiggin@yahoo.com.au> wrote:
> On Sunday 15 March 2009 17:48:18 Ingo Molnar wrote: > > > > Cc: Nick Piggin <npiggin@suse.de> > > > Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> > > > LKML-Reference: <20090128135457.350751756@chello.nl> > > > Signed-off-by: Ingo Molnar <mingo@elte.hu> > > > > and with this fixed, and with SLOB now being tested in -tip, the > > new lockdep assert attached below (followed by a real lockup) > > pops up. > > > > Seems like a genuine SLOB bug, probably present upstream as > > well. > > Hmmf. debugobjects calls back into the slab allocator from the > page allocator. The following patch would improve SLOB, but I > think it would be a good idea to avoid a dependency in that > direction. Can debugobjects defer this freeing?
dunno - that's a question for Thomas.
this lockup does not trigger under any of the other allocators.
Ingo
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