#12060 NORM 4-softw: XO-4 - FS corruption and hangs under memory pressure

Zarro Boogs per Child bugtracker at laptop.org
Tue Aug 21 17:37:12 EDT 2012

#12060: XO-4 - FS corruption and hangs under memory pressure
 Reporter:  martin.langhoff  |                 Owner:  cjb          
     Type:  defect           |                Status:  new          
 Priority:  normal           |             Milestone:  4-software   
Component:  not assigned     |               Version:  not specified
 Keywords:                   |           Next_action:  never set    
 Verified:  0                |   Deployment_affected:               
Blockedby:                   |              Blocking:               
 With Q7A06 and OS build
 http://dev.laptop.org/~martin/xo4-builds/21009xx2.zd (and earlier) we are
 easily triggering FS corruption and sometimes locking up hard when running
 yum installs or loading large, complex pages in Browse.

 After a bit of testing, we cannot seem to trigger this issue with disk IO
 and CPU load (ie: during runin). Workloads with sqlite3 were tried (lots
 of seeks, small writes and calls to sync()) and did not trigger the bug

 The bug disappears when booting with mem=512M, mem=1000M or mem=1024M. The
 bug remains when disabling one of the memory controllers via CForth.

 Tentatively blamed on software.

Ticket URL: <http://dev.laptop.org/ticket/12060>
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