Re: Hung task when calling clone() due to netfilter/slab

[Sasha Levin]

On Sat, 2012-01-14 at 18:10 +0100, Eric Dumazet wrote:
> Apparently SLUB calls sysfs_slab_add() from kmem_cache_create() while
> still holding slub_lock.
> 
> So if the task launched needs to "cat /proc/slabinfo" or anything
> needing slub_lock, its a deadlock.

I've made the following patch to test it, It doesn't look like it's the correct solution, but it verifies that the problem is there (it works well with the patch).

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