RE: memory zone and slab

The zonelists are initialized in 'build_all_zonelists()' 
called by 'start_kernel()'. But prior to that point
there is allot of other code that determines the 
various zones and holes a key function is free_area_init_node().
But that function will also reference prior initialization
in 'setup_arch()' which may take you all the way back
to bootloader to kernel interface.

Nodes have zones, and zones define what the memory is 
appropriate for, DMA or lowmem, Normal memory or High memory
for 32 bit. For 64 bit there are fewer zones just primarily
32 bit DMA and normal 64 bit. Zones are further divided
into free areas of 2^n consecutive pages.

Slabs are typically pages carved up into smaller units of 
allocations. 

There are several kernel books but outdated, but nevertheless good
starting points, just search for 'Kernel Internals'

BR,
 Mario.


-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of ishare
Sent: Thursday, March 07, 2013 3:35 PM
To: [email protected]
Subject: memory zone and slab


   when does the memory zonelist initialized in kernel ?

   what is the difference between zonelists and slab for memory manage .

   are there some man docs or sites  helpful to understand this ?
   
   thanks! 
  
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