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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-06 08:59:41 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-06 08:59:41 -0700 |
| commit | a4c20b9a574b9720acf6c647eaff5e7e1e688086 (patch) | |
| tree | d25c1d51c6f55de593028fde1276ea9976214014 /mm/Kconfig | |
| parent | 9b51f04424e17051a89ab32d892ca66b2a104825 (diff) | |
| parent | e3efe3db932b55ed34ba32862f568abae32046d0 (diff) | |
| download | lwn-a4c20b9a574b9720acf6c647eaff5e7e1e688086.tar.gz lwn-a4c20b9a574b9720acf6c647eaff5e7e1e688086.zip | |
Merge branch 'for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
Pull percpu updates from Tejun Heo:
"These are the percpu changes for the v4.13-rc1 merge window. There are
a couple visibility related changes - tracepoints and allocator stats
through debugfs, along with __ro_after_init markings and a cosmetic
rename in percpu_counter.
Please note that the simple O(#elements_in_the_chunk) area allocator
used by percpu allocator is again showing scalability issues,
primarily with bpf allocating and freeing large number of counters.
Dennis is working on the replacement allocator and the percpu
allocator will be seeing increased churns in the coming cycles"
* 'for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
percpu: fix static checker warnings in pcpu_destroy_chunk
percpu: fix early calls for spinlock in pcpu_stats
percpu: resolve err may not be initialized in pcpu_alloc
percpu_counter: Rename __percpu_counter_add to percpu_counter_add_batch
percpu: add tracepoint support for percpu memory
percpu: expose statistics about percpu memory via debugfs
percpu: migrate percpu data structures to internal header
percpu: add missing lockdep_assert_held to func pcpu_free_area
mark most percpu globals as __ro_after_init
Diffstat (limited to 'mm/Kconfig')
| -rw-r--r-- | mm/Kconfig | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/mm/Kconfig b/mm/Kconfig index 398b46064544..665cb370ad38 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -706,3 +706,11 @@ config ARCH_USES_HIGH_VMA_FLAGS bool config ARCH_HAS_PKEYS bool + +config PERCPU_STATS + bool "Collect percpu memory statistics" + default n + help + This feature collects and exposes statistics via debugfs. The + information includes global and per chunk statistics, which can + be used to help understand percpu memory usage. |