[PVFS2-developers] Re: smallio server death with old kernel

[Sam Lang]

On Jan 9, 2006, at 1:30 PM, Phil Carns wrote:

> Pete Wyckoff wrote:
>> slang at mcs.anl.gov wrote on Fri, 06 Jan 2006 10:13 -0600:
>>> Thanks for looking into this Murali.  I'm back from vacation  
>>> today so  I'll look at these patches and try to get them  
>>> committed ASAP.
>> Just so you know, the fixes work fine here.  I've restarted all our
>> production machines with CVS head.  Thanks both,
>> 		-- Pete
>
>
> I am seeing an error with the current CVS head when running the  
> "read01" test from the LTP test suite.  I don't know what is  
> causing the initial problem, but there is a state machine issue  
> that is contributing.  In small-io.sm we have this transition:
>
>     state start_job
>     {
>         run small_io_start_job;
>         success => send_response;
>         default => cleanup;
>     }
>
> Should there just be one transition to send_response (default =>  
> send_response) rather than doing something different for success or  
> failure?  Right now the client hangs for a while if something goes  
> wrong in small_io_start_job() because no negative ack is sent back.
>

Yes and it looks like it should just jump to final-response.  I'll  
fix that up.

> The initial error that I am seeing that leads to this issue shows  
> up like this in the server logs:
>
> [E 19:56:37.776476] ../pvfs2_src/src/io/description/pint-request.c  
> line 89: PINT_process_request: NULL segmax or bytemax!
>

I'm able to reproduce this, not sure what the problem is yet though.

-sam

> <some backtrace stuff>
>
> [E 19:56:37.776654] small_io: Failed to process file request
>
> This previously triggered the assertion on line 183 of sys-small- 
> io.sm before it was removed.
>
> -Phil
>
>
>
>