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| author | Vlastimil Babka <vbabka@suse.cz> | 2026-02-08 19:17:42 +0100 |
|---|---|---|
| committer | Vlastimil Babka <vbabka@suse.cz> | 2026-02-10 09:10:00 +0100 |
| commit | 815c8e35511d0b9a214e9f644983fe477af9d5cb (patch) | |
| tree | cbbb5c37b065a9595a207eca145ceb257ea5fdc6 /kernel | |
| parent | 98e99fc4ad4b30dd28c09ba19686ec583af345b4 (diff) | |
| parent | 40fd0acc45d06709b3b1eea77e50e13f4145dff0 (diff) | |
Merge branch 'slab/for-7.0/sheaves' into slab/for-next
Merge series "slab: replace cpu (partial) slabs with sheaves".
The percpu sheaves caching layer 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 the lower locking overhead and much more likely fastpath when
freeing, this removes the rather complicated code related to the cpu
slab lockless fastpaths (using this_cpu_try_cmpxchg128/64) and all its
complications for 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
and to allow flushing objects from sheaves to slabs mostly without the
node list_lock.
Link: https://lore.kernel.org/all/20260123-sheaves-for-all-v4-0-041323d506f7@suse.cz/
Diffstat (limited to 'kernel')
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