#9972 NORM Not Tri: openfirmware writes fail on an ext2 filesystem of certain size range

[Zarro Boogs per Child]

#9972: openfirmware writes fail on an ext2 filesystem of certain size range
---------------------------------+------------------------------------------
 Reporter:  Quozl                |                 Owner:  wmb at firmworks.com
     Type:  defect               |                Status:  new              
 Priority:  normal               |             Milestone:  Not Triaged      
Component:  ofw - open firmware  |               Version:  not specified    
 Keywords:                       |           Next_action:  never set        
 Verified:  0                    |   Deployment_affected:                   
Blockedby:                       |              Blocking:                   
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 Context: OpenFirmware Q3A25 Q3A26, with an ext2 filesystem 1050000 sectors
 in size, using the Forth verbs copy and to-file .


 Symptom: the verbs fail and display a ''Flushbuf error''.  With show-
 aborts on the extended output is:

 {{{
 <buffer at ff9cf498>:53: Flushbuf error
 }}}

 Analysis: if the size of the filesystem is reduced to 1040000 sectors, the
 symptom does not occur.  Output from dumpe2fs shows a different structure
 is chosen by mke2fs at this size threshold.

 Logs: serial console logs from the good and fail case, as well as the
 dumpe2fs output, have been mailed to Mitch.  The test scripts that
 generate the filesystem with the boot/olpc.fth file on it can be found at:

 git clone http://dev.laptop.org/~quozl/6210/.git/
 browser http://dev.laptop.org/~quozl/6210/

-- 
Ticket URL: <http://dev.laptop.org/ticket/9972>
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