Messages in this thread | | | Subject | Re: possible recursive locking detected at kmem_cache_free | From | "Pallipadi, Venkatesh" <> | Date | Fri, 26 Jun 2009 09:58:22 -0700 |
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On Fri, 2009-06-26 at 00:37 -0700, Pekka J Enberg wrote: > Hi Venki, > > On Thu, 25 Jun 2009, Pallipadi, Venkatesh wrote: > > > > Not sure if this has been reported elsewhere. I started seeing this with git > > > > kernel from this morning on a system with RedHat EL5 base installation with > > > > ext3 root file system. Attached is the config I am using. > > > > > > > > Let me know if you need any more details. This seems to be at every boot. I > > > > am trying the bisect right now. > > > > > > > > > > Thanks. Let's cc Pekka. > > > > > > > git bisect result. > > Thanks! I think I just broke lockdep annotations for slab. Does this patch > fix things? >
Yes. This patch helps.
Thanks, Venki
> Pekka > > diff --git a/mm/slab.c b/mm/slab.c > index e74a16e..37ee532 100644 > --- a/mm/slab.c > +++ b/mm/slab.c > @@ -1544,9 +1544,6 @@ void __init kmem_cache_init(void) > } > > g_cpucache_up = EARLY; > - > - /* Annotate slab for lockdep -- annotate the malloc caches */ > - init_lock_keys(); > } > > void __init kmem_cache_init_late(void) > @@ -1563,6 +1560,9 @@ void __init kmem_cache_init_late(void) > /* Done! */ > g_cpucache_up = FULL; > > + /* Annotate slab for lockdep -- annotate the malloc caches */ > + init_lock_keys(); > + > /* > * Register a cpu startup notifier callback that initializes > * cpu_cache_get for all new cpus
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