Data corruption over NFS in -current

[Stefan Bethke]

Am 11.01.2012 um 17:57 schrieb Martin Cracauer:

> I'm sorry for the unspecific bug report but I thought a heads-up is
> better than none.
> 
> $ uname -a
> FreeBSD wings.cons.org 10.0-CURRENT FreeBSD 10.0-CURRENT #2: Wed Dec
> 28 12:19:21 EST 2011
> cracauer at wings.cons.org:/usr/src/sys/amd64/compile/WINGS  amd64

I'm sure Rick will want to know which NFS version, which client code (default new code I'm assuming) and which mount options...

> I see filesystem corruption on NFS filesystems here.  I am running a
> heavy shellscript that is noodling around with ascii files assembling
> them with awk and whatnot.  Some actions are concurrent with up to 21
> forks doing full-CPU load scripting.  This machine is a K8 with a
> total of 8 cores, diskless NFS and memory filesystem for /tmp.
> 
> I observe two problems:
> - for no reason whatsoever, some files change from my 
>  (user/group) cracauer/wheel to root/cracauer
> - the same files will later be corrupted.  The beginning of the file
>  is normal but then it has what looks like parts of /usr/ports,
>  including our CVS files and binary junk, mostly zeros
> 
> I did do some ports building lately but not at the same time that this
> problem manifested itself.  I speculate some ports blocks were still
> resident in the filesystem buffer cache.
> 
> Server is Linux.
> 
> Martin
> -- 
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> Martin Cracauer <cracauer at cons.org>   http://www.cons.org/cracauer/
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-- 
Stefan Bethke <stb at lassitu.de>   Fon +49 151 14070811