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| author | Vlastimil Babka <vbabka@suse.cz> | 2022-05-25 13:25:59 +0200 |
|---|---|---|
| committer | akpm <akpm@linux-foundation.org> | 2022-05-27 09:33:47 -0700 |
| commit | 0710d0122abc93adcb9a70a78f1625c491f6ad91 (patch) | |
| tree | 1ee56844a3b8b90d8b0411d6c56440d3e5b62bf4 /init | |
| parent | fbf4df0699926cf620b2f722ddc213826e248962 (diff) | |
| download | linux-0710d0122abc93adcb9a70a78f1625c491f6ad91.tar.bz2 | |
mm: Kconfig: reorganize misplaced mm options
After commits 7b42f1041c98 ("mm: Kconfig: move swap and slab config
options to the MM section") and 519bcb797907 ("mm: Kconfig: group swap,
slab, hotplug and thp options into submenus") we now have nicely organized
mm related config options. I have noticed some that were still misplaced,
so this moves them from various places into the new structure:
VM_EVENT_COUNTERS, COMPAT_BRK, MMAP_ALLOW_UNINITIALIZED to mm/Kconfig and
general MM section.
SLUB_STATS to mm/Kconfig and the slab submenu.
DEBUG_SLAB, SLUB_DEBUG, SLUB_DEBUG_ON to mm/Kconfig.debug and the Kernel
hacking / Memory Debugging submenu.
Link: https://lkml.kernel.org/r/20220525112559.1139-1-vbabka@suse.cz
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 53 |
1 files changed, 0 insertions, 53 deletions
diff --git a/init/Kconfig b/init/Kconfig index 1d2ecd227f4b..0cff02738290 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -1828,59 +1828,6 @@ config DEBUG_PERF_USE_VMALLOC endmenu -config VM_EVENT_COUNTERS - default y - bool "Enable VM event counters for /proc/vmstat" if EXPERT - help - VM event counters are needed for event counts to be shown. - This option allows the disabling of the VM event counters - on EXPERT systems. /proc/vmstat will only show page counts - if VM event counters are disabled. - -config SLUB_DEBUG - default y - bool "Enable SLUB debugging support" if EXPERT - depends on SLUB && SYSFS - 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. - -config COMPAT_BRK - bool "Disable heap randomization" - default y - help - Randomizing heap placement makes heap exploits harder, but it - also breaks ancient binaries (including anything libc5 based). - This option changes the bootup default to heap randomization - disabled, and can be overridden at runtime by setting - /proc/sys/kernel/randomize_va_space to 2. - - On non-ancient distros (post-2000 ones) N is usually a safe choice. - -config MMAP_ALLOW_UNINITIALIZED - bool "Allow mmapped anonymous memory to be uninitialized" - depends on EXPERT && !MMU - default n - help - Normally, and according to the Linux spec, anonymous memory obtained - from mmap() has its contents cleared before it is passed to - userspace. Enabling this config option allows you to request that - mmap() skip that if it is given an MAP_UNINITIALIZED flag, thus - providing a huge performance boost. If this option is not enabled, - then the flag will be ignored. - - This is taken advantage of by uClibc's malloc(), and also by - ELF-FDPIC binfmt's brk and stack allocator. - - Because of the obvious security issues, this option should only be - enabled on embedded devices where you control what is run in - userspace. Since that isn't generally a problem on no-MMU systems, - it is normally safe to say Y here. - - See Documentation/admin-guide/mm/nommu-mmap.rst for more information. - config SYSTEM_DATA_VERIFICATION def_bool n select SYSTEM_TRUSTED_KEYRING |