Subject: Re: Processes getting stuck in disk wait on current currents
To: Wolfgang Rupprecht <>
From: Chuck Silvers <>
List: current-users
Date: 02/18/2001 19:21:56
I just copied 500 MB from NFS to a local filesystem with "tar | (cd && tar)"
on an x86 and it worked fine.

can you get a crashdump while some processes are hung in biowait?


On Sun, Feb 18, 2001 at 03:34:03PM -0800, Wolfgang Rupprecht wrote:
> > On my system trace from DDB gave good data - basically the system
> > is healthy and sitting in the idle loop, no interrupts masked, pingable on
> > the network etc. 
> Seems that one of my machines is now doing this too.  Yesterday rdists
> to it would mysteriously hang and eventually get aborted by the
> sending side.  I could still log into that machine via ssh, but that
> rdist was stuck.
> Just to make sure that it wasn't an ffs corruption bug I went single
> user, mounted an NFS /usr and newfs-ed the local one.  Then I did a
> tar copy from the NFS-ed /usr to the clean local partition.  The tar
> also hung after a few 10's of megs.  The writing tar is waiting on
> "biowait" flags 0x4006 according to DDB.  (This is even with
> "genfs_vnops.c,v 1.29 2001/02/18")  
> Does this ring a bell for anyone?
> -wolfgang
> -- 
>        Wolfgang Rupprecht <>
> Coming soon: GPS mapping tools for Open Systems.