Hi,

I just saw this comment in find_vma():
  /* Check the cache first. */
  /* (Cache hit rate is typically around 35%.) */

I just wanted to play around a bit. Just for fun.
So I wrote the attached patch to collect find_vma()
statistics. I was wondering why my cache hit rate is around
60%. It's always between 55 and 65 percent. Depending on
the workload.
Is this on obsolete comment from the 2.4 days, maybe?

mb@lfs:~$ cat /proc/findvma_stat 
findvma_stat_cachehit  == 356524
findvma_stat_cachemiss == 248728
findvma_stat_fail      == 0
cachehit percentage    == 58%
cachemiss percentage   == 41%
fail percentage        == 0%

My kernel is:
mb@lfs:~$ uname -r
2.6.10-rc2-ck2-nozeroram-findvmastat

If you are interrested to comment on this, please CC: me,
as I'm not subscribed to this mailing list. Thanks.

-- 
Regards Michael Buesch  [ http://www.tuxsoft.de.vu ]