Messages in this thread | | | Subject | Re: [PATCH] slub: fix __kmem_cache_empty for !CONFIG_SLUB_DEBUG | From | Andrey Ryabinin <> | Date | Wed, 20 Jun 2018 15:09:38 +0300 |
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On 06/20/2018 12:33 AM, Shakeel Butt wrote: > For !CONFIG_SLUB_DEBUG, SLUB does not maintain the number of slabs > allocated per node for a kmem_cache. Thus, slabs_node() in > __kmem_cache_empty() will always return 0. So, in such situation, it is > required to check per-cpu slabs to make sure if a kmem_cache is empty or > not. > > Please note that __kmem_cache_shutdown() and __kmem_cache_shrink() are > not affected by !CONFIG_SLUB_DEBUG as they call flush_all() to clear > per-cpu slabs.
So what? Yes, they call flush_all() and then check if there are non-empty slabs left. And that check doesn't work in case of disabled CONFIG_SLUB_DEBUG. How is flush_all() or per-cpu slabs even relevant here?
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