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[Xen-users] write through or write back?

  • To: xen-users <xen-users@xxxxxxxxxxxxxxxxxxx>
  • From: Lei Lu <lulei.wm@xxxxxxxxx>
  • Date: Mon, 22 Nov 2010 12:18:13 -0500
  • Delivery-date: Mon, 22 Nov 2010 09:21:16 -0800
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  • List-id: Xen user discussion <xen-users.lists.xensource.com>

Hi everyone,

Can anybody clarify about what disk cache mechanism the current Xen
hypervisor use? is it write through or write back? Is there a way to
change between this two modes? As far as I know, the original linux
kernel implements the disk cache as page cache and the flusher thread
may periodically flush the dirty pages to the disk. Does Xen still use
this strategy by default or not?

Thank you in advance,

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