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Re: XFS and knfsd

To: Steve Lord <lord@xxxxxxx>
Subject: Re: XFS and knfsd
From: Ajay Shekhawat <ajay@xxxxxxxxxxxxxxxxx>
Date: Tue, 10 Apr 2001 11:56:50 -0400
Cc: linux-xfs@xxxxxxxxxxx
In-reply-to: <200104101533.f3AFXnR04033@jen.americas.sgi.com>; from lord@sgi.com on Tue, Apr 10, 2001 at 10:33:49AM -0500
Organization: Center for Document Analysis and Recognition
References: <ajay@cedar.buffalo.edu> <200104101533.f3AFXnR04033@jen.americas.sgi.com>
Sender: owner-linux-xfs@xxxxxxxxxxx
User-agent: Mutt/1.2.5i
On Tue, Apr 10, 2001 at 10:33:49AM -0500, Steve Lord wrote:
> We are aware of your problem, can you fill in a few more details such as
> are you running nfs v2 or v3 exports and what do you characterize as
> very heavy load, nfsstat output might be interesting after a few hours of
> uptime. Client quantities and types would be good to. 
> 
> I am currently working another nfs bug which only shows visible manifestation
> on solaris clients, but appears to be bad packet generation on a readdir.

I'm running NFS v3 exports to 4 Linux clients. Each client hammers on the
server by reading random 3MB files (2 processes on each client machine). 
One of the clients also writes random-sized (upto 2MB) files, and periodically
deletes the old ones.

Here's the output of the following commands just a few seconds before the
oops:
    % cat /proc/fs/pagebuf/stat
    pagebuf 7098871 4525960 2572922 1891 43 175769 7164056 284569
     
    % cat /proc/fs/xfs/stat
    extent_alloc 28969 3916897 28637 3916006
    abt 168904 588465 62088 62084
    blk_map 199068226 9888984 199345 9888983 199677 209156531 167391241
    bmbt 786 4667 376 399
    dir 598330 199074 199041 272
    trans 27996 654700 171057
    ig 399256 398081 0 1175 0 0 0
    log 81992 3798058 410 38929 29028
    push_ail 853753 0 0 0 0 0 0 0 0 0
    xstrat 28951 0
    rw 25280224 89246733
    attr 0 0 0 0
    qm 0 0 0 0 0 0 0 0
    icluster 164155 37791 93328
    vnodes 1174 200215 199041 995716 116996462 199041 199041 0
    xpc 16043536384 103136127363 365554618368
    

Next time around, I'll be running nfsstat in a loop. The problem manifests 
itself after 15 hours or so, so the wait is agonizing.  :-)

Thanks for the help,  I didn't mean to sound pushy  :-)

Ajay


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