[PATCH] CONFIG_VM_EVENT_COUNTER comment decrustify

The VM event counters, enabled by CONFIG_VM_EVENT_COUNTERS, which provides
VM event counters in /proc/vmstat, has become more essential to
non-EMBEDDED kernel configurations than they were in the past.  Comments in
the code and the Kconfig configuration explanation were stale, downplaying
their role excessively.

Refresh those comments to correctly reflect the current role of VM event
counters.

Signed-off-by: Paul Jackson <pj@sgi.com>
Acked-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h
index c89df55f6e035df2ef064726c870911506c7debc..532360010919f1804fff552a84a80a784ad016ea 100644 (file)
--- a/include/linux/vmstat.h
+++ b/include/linux/vmstat.h
@@ -10,8 +10,9 @@
 /*
  * Light weight per cpu counter implementation.
  *
- * Counters should only be incremented and no critical kernel component
- * should rely on the counter values.
+ * Counters should only be incremented.  You need to set EMBEDDED
+ * to disable VM_EVENT_COUNTERS.  Things like procps (vmstat,
+ * top, etc) use /proc/vmstat and depend on these counters.
  *
  * Counters are handled completely inline. On many platforms the code
  * generated will simply be the increment of a global address.

diff --git a/init/Kconfig b/init/Kconfig
index f000edb3bb7a8b121951b445b37b8328418f3507..9b1adb176ea85b8b7c5806e5cbd5eb6a390cbf06 100644 (file)
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -461,10 +461,10 @@ config VM_EVENT_COUNTERS
        default y
        bool "Enable VM event counters for /proc/vmstat" if EMBEDDED
        help
-         VM event counters are only needed to for event counts to be
-         shown. They have no function for the kernel itself. This
-         option allows the disabling of the VM event counters.
-         /proc/vmstat will only show page counts.
+         VM event counters are needed for event counts to be shown.
+         This option allows the disabling of the VM event counters
+         on EMBEDDED systems.  /proc/vmstat will only show page counts
+         if VM event counters are disabled.
 
 endmenu                # General setup