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[Xen-users] Default disk I/O scheduler in linux guest

  • To: xen-users@xxxxxxxxxxxxxxxxxxx
  • From: Jia Rao <rickenrao@xxxxxxxxx>
  • Date: Wed, 4 Feb 2009 17:24:17 -0500
  • Delivery-date: Wed, 04 Feb 2009 14:25:06 -0800
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  • List-id: Xen user discussion <xen-users.lists.xensource.com>
Hi, all,

I just found out that xen assigns the NOOP disk scheduler for linux guest OSes. Dom0 uses cfq scheduler (it is the linux default).
Is there a reason for xen to turn off disk request merging in the quest OS by selecting a NOOP scheduler?
Is it because the request optimization will be performed in dom0 or VMM ?

Thansk in advance,
Jia.  
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