Christos Zoulas --> netbsd-users (2007-06-23 01:10:09 +0000):
> It does make a lot of sense, but this is not what we do with the other
> databases currently. And this will cost 2 more stats...

Speaking of some more stats: why is services.db stat()ed and open()ed
several times when doing something like:

$ ktrace telnet mail.netbsd.org. smtp
Trying 2001:4f8:4:7:2e0:81ff:fe52:9ab6...
Trying 204.152.190.11...
Connected to mail.netbsd.org.
Escape character is '^]'.
220 mail.netbsd.org ESMTP Postfix
quit
221 Bye
Connection closed by foreign host.
$ kdump | grep -B1 services               
  6137      1 telnet   CALL  __stat30(0xbb9e6d63,0xbfbfe360)
  6137      1 telnet   NAMI  "/var/db/services.db"
--
  6137      1 telnet   CALL  open(0xbb9e6d63,0,0)
  6137      1 telnet   NAMI  "/var/db/services.db"
--
  6137      1 telnet   CALL  __stat30(0xbb9e6d63,0xbfbfe360)
  6137      1 telnet   NAMI  "/var/db/services.db"
--
  6137      1 telnet   CALL  open(0xbb9e6d63,0,0)
  6137      1 telnet   NAMI  "/var/db/services.db"
[...]
  6137      1 telnet   CALL  __stat30(0xbb9e6d63,0xbfbfe360)
  6137      1 telnet   NAMI  "/var/db/services.db"
--
  6137      1 telnet   CALL  open(0xbb9e6d63,0,0)
  6137      1 telnet   NAMI  "/var/db/services.db"
--
  6137      1 telnet   CALL  __stat30(0xbb9e6d63,0xbfbfe360)
  6137      1 telnet   NAMI  "/var/db/services.db"
--
  6137      1 telnet   CALL  open(0xbb9e6d63,0,0)
  6137      1 telnet   NAMI  "/var/db/services.db"

Hmm, twelve stat()s and twelve open()s, always just to look up `smtp
25/tcp mail'... Shouldn't this be done only once?


Regards, Jukka

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