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authorArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2011-04-05 13:24:57 +0300
committerMichal Marek <mmarek@suse.cz>2011-04-15 15:48:01 +0200
commit71a83ec7da8910f374a1c82e96d2704aa45d9238 (patch)
tree29d76d098aad49f92e3a745fb87c17d90511f524
parent0ce790e7d736cedc563e1fb4e998babf5a4dbc3d (diff)
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Kconfig: improve KALLSYMS_ALL documentation
Dumb users like myself are not able to grasp from the existing KALLSYMS_ALL documentation that this option is not what they need. Improve the help message and make it clearer that KALLSYMS is enough in the majority of use cases, and KALLSYMS_ALL should really be used very rarely. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: Michal Marek <mmarek@suse.cz>
-rw-r--r--init/Kconfig18
1 files changed, 12 insertions, 6 deletions
diff --git a/init/Kconfig b/init/Kconfig
index 56240e7..563065d 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -968,12 +968,18 @@ config KALLSYMS_ALL
bool "Include all symbols in kallsyms"
depends on DEBUG_KERNEL && KALLSYMS
help
- Normally kallsyms only contains the symbols of functions, for nicer
- OOPS messages. Some debuggers can use kallsyms for other
- symbols too: say Y here to include all symbols, if you need them
- and you don't care about adding 300k to the size of your kernel.
-
- Say N.
+ Normally kallsyms only contains the symbols of functions for nicer
+ OOPS messages and backtraces (i.e., symbols from the text and inittext
+ sections). This is sufficient for most cases. And only in very rare
+ cases (e.g., when a debugger is used) all symbols are required (e.g.,
+ names of variables from the data sections, etc).
+
+ This option makes sure that all symbols are loaded into the kernel
+ image (i.e., symbols from all sections) in cost of increased kernel
+ size (depending on the kernel configuration, it may be 300KiB or
+ something like this).
+
+ Say N unless you really need all symbols.
config KALLSYMS_EXTRA_PASS
bool "Do an extra kallsyms pass"