diff options
Diffstat (limited to 'mm/Kconfig.debug')
| -rw-r--r-- | mm/Kconfig.debug | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/mm/Kconfig.debug b/mm/Kconfig.debug index c3547a373c9c..a925415b4d10 100644 --- a/mm/Kconfig.debug +++ b/mm/Kconfig.debug @@ -60,9 +60,9 @@ config SLUB_DEBUG select STACKDEPOT if STACKTRACE_SUPPORT help SLUB has extensive debug support features. Disabling these can - result in significant savings in code size. This also disables - SLUB sysfs support. /sys/slab will not exist and there will be - no support for cache validation etc. + result in significant savings in code size. While /sys/kernel/slab + will still exist (with SYSFS enabled), it will not provide e.g. cache + validation. config SLUB_DEBUG_ON bool "SLUB debugging on by default" @@ -249,14 +249,6 @@ config DEBUG_KMEMLEAK_MEM_POOL_SIZE fully initialised, this memory pool acts as an emergency one if slab allocations fail. -config DEBUG_KMEMLEAK_TEST - tristate "Simple test for the kernel memory leak detector" - depends on DEBUG_KMEMLEAK && m - help - This option enables a module that explicitly leaks memory. - - If unsure, say N. - config DEBUG_KMEMLEAK_DEFAULT_OFF bool "Default kmemleak to off" depends on DEBUG_KMEMLEAK @@ -279,3 +271,15 @@ config DEBUG_KMEMLEAK_AUTO_SCAN If unsure, say Y. +config PER_VMA_LOCK_STATS + bool "Statistics for per-vma locks" + depends on PER_VMA_LOCK + help + Say Y here to enable success, retry and failure counters of page + faults handled under protection of per-vma locks. When enabled, the + counters are exposed in /proc/vmstat. This information is useful for + kernel developers to evaluate effectiveness of per-vma locks and to + identify pathological cases. Counting these events introduces a small + overhead in the page fault path. + + If in doubt, say N. |