Re: kern/38374: fdfile leak

[yamt%mwd.biglobe.ne.jp@localhost (YAMAMOTO Takashi)]

> The following reply was made to PR kern/38374; it has been noted by GNATS.
> 
> From: Thomas Klausner <wiz%NetBSD.org@localhost>
> To: gnats-bugs%NetBSD.org@localhost
> Cc: yamt%NetBSD.org@localhost
> Subject: Re: kern/38374: fdfile leak
> Date: Tue, 8 Apr 2008 23:24:32 +0200
> 
>  Greg suggests I add the following information to the PR.
>  
>  With the bulk build interrupted (CTRL-Z) and only a few userland
>  programs running (terminals, X server, screen, amarok),
>  # vmstat -m | grep fdfile && fstat | wc
>  says:
>  vmstat: Kmem statistics are not being gathered by the kernel.
>  fdfile        64     5665    0     4637    22     5    17    17     0 inf    > 0
>       573    5041   42966
>  
>  4637 + 573 = 5210, which is a few hundred off from 5665.
>  Not sure if the measurement is correct though, but if it is, there
>  might be another leak somewhere or the fix is incomplete.
>   Thomas

- it's normal that the number of allocated fdfile is not same as
  the number of open files.

- you should subtract the number of cached objects.
  ("vmstat -C|grep fdfile|awk '{print $3*$4}'" + some more.)

YAMAMOTO Takashi