[Xen-devel] Fix mem_sharing on Xen 4.0.0

[MaoXiaoyun <tinnycloud@xxxxxxxxxxx>]

 Hi:
 
      I've been trying to fix memory sharing on xen for a few days.
      Now it works on my box, I'd like to share the patches.
 
     Attached is the fix for code of tools in xen.(Sorry, I don't know how to make git patches.)
     Also you should apply the patch of http://lists.xensource.com/archives/html/xen-devel/2010-12/msg00149.html
     
     Currently, I am able to start 24 HVMS(each of which memory=512, maxmem=2048) 
     After all VMS start, Xen info shows that without mem_sharing,  the free memory is 7486
     and with mem_sharing, free is 9000, so 1.5G memory is saved.
 
    Remember, you should start the blktap/drivers/blktapctrl first, since it is enable hash share between tapdisk process.
    also add memory_sharing into your HVM file to enable sharing.
 
    thanks. 
  
   
 
 
 

Attachment: tools.patch
Description: Binary data

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