Re: [Xen-devel] question about disk performance in domU

[xuehai zhang <hai@xxxxxxxxxxxxxxx>]

Adam,
I don't know much about how hdparm really works. Are you suggesting dom0's file buffer cache should 
be flushed by default every time because hdparm calls an ioctl to flush? If it is not the case, how 
does the data used by hdparm in domU get into the dom0's file buffer cache in the 1st run?
Thanks.
Xuehai

Adam Heath wrote:
> On Mon, 21 Nov 2005, xuehai zhang wrote:
>
>
> > Renato and Tim,
> > Thank you for your replies.
> > Is there anyway to flush the dom0 file buffer before running hdparm on domU 
> > each time?
>
> hdparm calls an ioctl to flush it.  Maybe that should be passed thru.

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