The patch titled
Subject: mm/slub: optimize alloc/free fastpath by removing preemption on/off
has been added to the -mm tree. Its filename is
mm-slub-optimize-alloc-free-fastpath-by-removing-preemption-on-off-v3.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-slub-optimize-alloc-free-fastpath-by-removing-preemption-on-off-v3.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-slub-optimize-alloc-free-fastpath-by-removing-preemption-on-off-v3.patch
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------------------------------------------------------
From: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Subject: mm/slub: optimize alloc/free fastpath by removing preemption on/off
Change from v2:
- use raw_cpu_ptr() rather than this_cpu_ptr() to avoid warning from
preemption debug check since this is intended behaviour
- fix typo alogorithm -> algorithm
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Acked-by: Christoph Lameter <cl@xxxxxxxxx>
Acked-by: Jesper Dangaard Brouer <brouer@xxxxxxxxxx>
Tested-by: Jesper Dangaard Brouer <brouer@xxxxxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/slub.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff -puN mm/slub.c~mm-slub-optimize-alloc-free-fastpath-by-removing-preemption-on-off-v3 mm/slub.c
--- a/mm/slub.c~mm-slub-optimize-alloc-free-fastpath-by-removing-preemption-on-off-v3
+++ a/mm/slub.c
@@ -2404,11 +2404,11 @@ redo:
*/
do {
tid = this_cpu_read(s->cpu_slab->tid);
- c = this_cpu_ptr(s->cpu_slab);
+ c = raw_cpu_ptr(s->cpu_slab);
} while (IS_ENABLED(CONFIG_PREEMPT) && unlikely(tid != c->tid));
/*
- * Irqless object alloc/free alogorithm used here depends on sequence
+ * Irqless object alloc/free algorithm used here depends on sequence
* of fetching cpu_slab's data. tid should be fetched before anything
* on c to guarantee that object and page associated with previous tid
* won't be used with current tid. If we fetch tid first, object and
@@ -2670,7 +2670,7 @@ redo:
*/
do {
tid = this_cpu_read(s->cpu_slab->tid);
- c = this_cpu_ptr(s->cpu_slab);
+ c = raw_cpu_ptr(s->cpu_slab);
} while (IS_ENABLED(CONFIG_PREEMPT) && unlikely(tid != c->tid));
/* Same with comment on barrier() in slab_alloc_node() */
_
Patches currently in -mm which might be from iamjoonsoo.kim@xxxxxxx are
mm-slub-optimize-alloc-free-fastpath-by-removing-preemption-on-off.patch
mm-slub-optimize-alloc-free-fastpath-by-removing-preemption-on-off-v3.patch
mm-dont-use-compound_head-in-virt_to_head_page.patch
mm-vmstatc-fix-cleanup-ifdefs.patch
mm-vmstatc-fix-cleanup-ifdefs-fix.patch
mm-set-page-pfmemalloc-in-prep_new_page.patch
mm-page_alloc-reduce-number-of-alloc_pages-functions-parameters.patch
mm-reduce-try_to_compact_pages-parameters.patch
mm-microoptimize-zonelist-operations.patch
list_lru-introduce-list_lru_shrink_countwalk.patch
fs-consolidate-nrfree_cached_objects-args-in-shrink_control.patch
vmscan-per-memory-cgroup-slab-shrinkers.patch
memcg-rename-some-cache-id-related-variables.patch
memcg-add-rwsem-to-synchronize-against-memcg_caches-arrays-relocation.patch
list_lru-get-rid-of-active_nodes.patch
list_lru-organize-all-list_lrus-to-list.patch
list_lru-introduce-per-memcg-lists.patch
fs-make-shrinker-memcg-aware.patch
mm-cma-fix-totalcma_pages-to-include-dt-defined-cma-regions.patch
mm-compaction-change-tracepoint-format-from-decimal-to-hexadecimal.patch
mm-compaction-enhance-tracepoint-output-for-compaction-begin-end.patch
mm-compaction-print-current-range-where-compaction-work.patch
mm-compaction-more-trace-to-understand-when-why-compaction-start-finish.patch
mm-compaction-add-tracepoint-to-observe-behaviour-of-compaction-defer.patch
mm-util-add-kstrdup_const.patch
kernfs-convert-node-name-allocation-to-kstrdup_const.patch
clk-convert-clock-name-allocations-to-kstrdup_const.patch
mm-slab-convert-cache-name-allocations-to-kstrdup_const.patch
mm-slab-convert-cache-name-allocations-to-kstrdup_const-fix.patch
fs-namespace-convert-devname-allocation-to-kstrdup_const.patch
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