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authorDavidlohr Bueso <davidlohr@hp.com>2014-06-04 16:06:46 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-06-04 16:53:57 -0700
commit4f115147ff802267d0aa41e361c5aa5bd933d896 (patch)
tree27afdf3f60c21fde601df63d9e9998b0c758a3fe /mm/vmstat.c
parent6f04f48dc9c0433e2bb687f5f7f7af1aba97b04d (diff)
downloadlinux-4f115147ff802267d0aa41e361c5aa5bd933d896.tar.bz2
mm,vmacache: add debug data
Introduce a CONFIG_DEBUG_VM_VMACACHE option to enable counting the cache hit rate -- exported in /proc/vmstat. Any updates to the caching scheme needs this kind of data, thus it can save some work re-implementing the counting all the time. Signed-off-by: Davidlohr Bueso <davidlohr@hp.com> Cc: Aswin Chandramouleeswaran <aswin@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/vmstat.c')
-rw-r--r--mm/vmstat.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 302dd076b8bf..82ce17ce58c4 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -866,6 +866,10 @@ const char * const vmstat_text[] = {
"nr_tlb_local_flush_one",
#endif /* CONFIG_DEBUG_TLBFLUSH */
+#ifdef CONFIG_DEBUG_VM_VMACACHE
+ "vmacache_find_calls",
+ "vmacache_find_hits",
+#endif
#endif /* CONFIG_VM_EVENTS_COUNTERS */
};
#endif /* CONFIG_PROC_FS || CONFIG_SYSFS || CONFIG_NUMA */