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| author | Davidlohr Bueso <davidlohr@hp.com> | 2014-06-04 16:06:46 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-06-04 16:53:57 -0700 |
| commit | 4f115147ff802267d0aa41e361c5aa5bd933d896 (patch) | |
| tree | 27afdf3f60c21fde601df63d9e9998b0c758a3fe /mm/vmstat.c | |
| parent | 6f04f48dc9c0433e2bb687f5f7f7af1aba97b04d (diff) | |
| download | lwn-4f115147ff802267d0aa41e361c5aa5bd933d896.tar.gz lwn-4f115147ff802267d0aa41e361c5aa5bd933d896.zip | |
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.c | 4 |
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 */ |