Re: [PATCH 07/16] slab: overloading the RCU head over the LRU forRCU free

[Christoph Lameter]

On Thu, 22 Aug 2013, Joonsoo Kim wrote:

> With build-time size checking, we can overload the RCU head over the LRU
> of struct page to free pages of a slab in rcu context. This really help to
> implement to overload the struct slab over the struct page and this
> eventually reduce memory usage and cache footprint of the SLAB.

Looks fine to me. Can you add the rcu_head to the struct page union? This
kind of overload is used frequently elsewhere as well. Then cleanup other
cases of such uses (such as in SLUB).

Acked-by: Christoph Lameter <cl@xxxxxxxxx>

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