Re: kern/37025 (mount_smbfs write performance is <censored>)

[David Holland <dholland-bugs%netbsd.org@localhost>]

The following reply was made to PR kern/37025; it has been noted by GNATS.

From: David Holland <dholland-bugs%netbsd.org@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: Ephaeton%gmx.net@localhost
Subject: Re: kern/37025 (mount_smbfs write performance is <censored>)
Date: Tue, 23 Mar 2010 17:29:04 +0000

 On Tue, Mar 23, 2010 at 01:55:02AM +0000, Martin S. Weber wrote:
  > Now where to go from here? I still believe there's a problem here, 
  > although the situation seriously improved in contrast to the eons
  > ago when I first filed this PR.
 
 Kernel profiling or fine-grained timing to figure out where the time
 is going? It is likely to be a pain.
 
  >  Also the problem with random hangs of the mount persists. I haven't
  >  seen this happening with smbclient yet, only with a mount_smbfs-mounted
  >  share.
 
 Figuring out whether this is network-related (e.g. stalls due to lost
 packets, protocol botches, etc.) or vfs-related (lock
 contention/deadlock/etc.) might also be helpful. After all, the
 performance problem might be small instances of the same issue...
 
 ps -alx should be enough to diagnose this; look for something that
 isn't "tstile". ("tstile" just means "waiting for something else").
 
 -- 
 David A. Holland
 dholland%netbsd.org@localhost