On Feb 21, 2007  08:30 -0800, David Brown wrote:
> >While testing 1.5.97 on kernel 2.6.18, I had the following Oops on a 
> >client.
> >
> >Unable to handle kernel paging request at ffff88000b17fff8 RIP:
> > [<ffffffff8843951a>] :osc:osc_brw_prep_request+0x3e3/0x9e2

Can you please decode this to a line number?

If you do "gdp .../osc.ko" and "list *(osc_brw_prep_request+0x3e3)"
it should give you a line number.

> >Note: the client was running on a Xen dom0, with fairly small memory, so
> >lustre is not necessarily at fault.
> >Further details on request.
> 
> Yeah I found running lustre in xen is kinda difficult when trying to
> partition out the memory, I use at least 512M for all lustre involved
> components of my xen/lustre systems.

Strange.  I've run 1.4 with client + MDS + 5 OSTs in a single 96MB UML.
The memory allocated by lustre generally scales as a function of RAM in
the system, so that it can at least function in lower-memory environments.
That said, I haven't run 1.6 in this environment.

Cheers, Andreas
--
Andreas Dilger
Principal Software Engineer
Cluster File Systems, Inc.

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