[Trac #571] Investigate CONFIG_MGEODELX

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#571: Investigate CONFIG_MGEODELX
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 Reporter:  cjb     |        Owner:  marcelo 
     Type:  defect  |       Status:  assigned
 Priority:  normal  |    Milestone:  BTest-2 
Component:  kernel  |   Resolution:          
 Keywords:          |  
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Changes (by marcelo):

  * owner:  cjb => marcelo
  * status:  new => assigned

Comment:

 Replying to [ticket:571 cjb]:
 > Once we have good coverage of performance in the tinderbox, we should
 turn on CONFIG_MGEODELX and  > see what happens.

 We're currently using X86_GENERIC:
 X86_L1_CACHE_SHIFT=7  (128byte cacheline)

 MGEODE_LX:
 X86_L1_CACHE_SHIFT=5 (32byte cacheline)
 X86_USE_PPRO_CHECKSUM = optimize csum_partial() function
 X86_USE_3DNOW = optimized mmx memcpy

 Note that many performance critical kernel structures are aligned to L1
 cache size, so we're _completly_ off with using X86_GENERIC!

 Andres, please disable X86_GENERIC and use MGEODE_LX instead.

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Ticket URL: <http://dev.laptop.org/ticket/571#comment:1>
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