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[Xen-users] Re: Default disk I/O scheduler in linux guest
- To: xen-users@xxxxxxxxxxxxxxxxxxx
- From: Jia Rao <rickenrao@xxxxxxxxx>
- Date: Thu, 5 Feb 2009 09:42:01 -0500
- Delivery-date: Thu, 05 Feb 2009 06:42:45 -0800
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Any ideas?
On Wed, Feb 4, 2009 at 5:24 PM, Jia Rao <rickenrao@xxxxxxxxx> wrote:
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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