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SubjectRe: WARNING: at lib/debugobjects.c:262 debug_print_object+0x8c/0xb0()
On Tue, 24 Jan 2012, Jeff Layton wrote:
> > Still, I wonder if there are other problems like this around. The slab
> > allocators seem to call debug_check_no_obj_freed() on kmem_cache_free,
> > but parts of the objects themselves (like the timer in the work object
> > here) get initialized in other places and aren't necessarily
> > reinitialized when they're recycled out of the slab...
> >
> On second thought...getting rid of the ctor function here might be
> problematic. We have to call inode_init_once, etc...
> Almost all of the inode slabs have one, so I've settled for just moving
> the INIT_DELAYED_WORK call out of init_once and into rpc_alloc_inode. I
> sent a patch to Trond and linux-nfs to do that. That will fix this
> case, but I do wonder if there are other places in the kernel that have
> similar problems with debugobject initialization.

The problem is that debugobject requires that a newly allocated object
is reinitialized and made available to the debugobjects code again
simply because we remove it from the debugobjects core on

The real question is why the heck kmem_cache_alloc() does not call the
ctor on each allocation and just expects the previously used and freed
object to be in a consistent initialiazed state.



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