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| author |   Kees Cook <keescook@chromium.org> | 2018-08-21 21:53:10 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2018-08-22 10:52:44 -0700 |
| commit | 8c9a134cae6f8d66f35321b07baa202f75ef2199 (patch) | |
| tree | 904ddde917ef7f993e5e1031a0ddfe03632870f7 /Documentation | |
| parent | mm: zero out the vma in vma_init() (diff) | |
| download | linux-dev-8c9a134cae6f8d66f35321b07baa202f75ef2199.tar.xz linux-dev-8c9a134cae6f8d66f35321b07baa202f75ef2199.zip | |
mm: clarify CONFIG_PAGE_POISONING and usage
The Kconfig text for CONFIG_PAGE_POISONING doesn't mention that it has to
be enabled explicitly. This updates the documentation for that and adds a
note about CONFIG_PAGE_POISONING to the "page_poison" command line docs.
While here, change description of CONFIG_PAGE_POISONING_ZERO too, as it's
not "random" data, but rather the fixed debugging value that would be used
when not zeroing. Additionally removes a stray "bool" in the Kconfig.
Link: http://lkml.kernel.org/r/20180725223832.GA43733@beast
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Laura Abbott <labbott@redhat.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index bffb0caa3693..970d837bd57f 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -3041,8 +3041,9 @@ on: enable the feature page_poison= [KNL] Boot-time parameter changing the state of - poisoning on the buddy allocator. - off: turn off poisoning + poisoning on the buddy allocator, available with + CONFIG_PAGE_POISONING=y. + off: turn off poisoning (default) on: turn on poisoning panic= [KNL] Kernel behaviour on panic: delay <timeout> |