On 05/20/2010 08:36 AM, Jes Sorensen wrote:
On 05/20/10 14:30, Anthony Liguori wrote:
On 05/20/2010 04:32 AM, jes.soren...@redhat.com wrote:
Therefore, here is a patch that does two things:
   - default to "nocache"
   - in case of failure with nocache, retry with "write-back"

This sort of change requires performance data in a variety of
circumstances to justify.

And I strongly suspect that such a blanket change would be wrong but
that a more targeted change like making cache=none default for physical
devices would satisfy mostly everyone.
Is there any other thing than physical devices attached to the -drive
parameter?

Image files which are the overwhelming more common use-case.

Regards,

Anthony Liguori

If so, I can take a look at making it more generic when I am back from
holiday next week.

Jes



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