Re: [PATCH RFC v2 00/20] slab: replace cpu (partial) slabs with sheaves

[Vlastimil Babka]

On 1/12/26 16:16, Vlastimil Babka wrote:
> Percpu sheaves caching was introduced as opt-in but the goal was to
> eventually move all caches to them. This is the next step, enabling
> sheaves for all caches (except the two bootstrap ones) and then removing
> the per cpu (partial) slabs and lots of associated code.
> 
> Besides (hopefully) improved performance, this removes the rather
> complicated code related to the lockless fastpaths (using
> this_cpu_try_cmpxchg128/64) and its complications with PREEMPT_RT or
> kmalloc_nolock().
> 
> The lockless slab freelist+counters update operation using
> try_cmpxchg128/64 remains and is crucial for freeing remote NUMA objects
> without repeating the "alien" array flushing of SLUB, and to allow
> flushing objects from sheaves to slabs mostly without the node
> list_lock.
> 
> This v2 is the first non-RFC. I would consider exposing the series to
> linux-next at this point.
> 
> Git branch for the v2:
>   https://git.kernel.org/pub/scm/linux/kernel/git/vbabka/linux.git/log/?h=sheaves-for-all-v2

The current state with collected fixes:

https://git.kernel.org/pub/scm/linux/kernel/git/vbabka/linux.git/log/?h=b4/sheaves-for-all