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Re: [libvirt] [PATCH v2] Add new attribute writeout to <filesystem> element



On 12/22/2011 03:10 AM, Deepak C Shetty wrote:
> This introduces new attribute writeout with only supported
> value as immediate. This will be an optional
> attribute with no defaults. This helps specify whether
> to skip the host page cache.
> 
> When writeout is specified, meaning when writeout=immediate
> a writeback is explicitly initiated for the dirty pages in
> the host page cache as part of the guest file write operation.
> 
> Usage:
> <filesystem type='mount' accessmode='passthrough' writeout='immediate'>
>   <source dir='/export/to/guest'/>
>   <target dir='mount_tag'/>
> </filesystem>

I still don't like the proposed XML.  We need to get consensus on where
to put it, with my proposal being:

<filesystem type='mount'>
  <driver type='path' write='immediate'/>
  <source dir='/export/to/guest'/>
  <target dir='mount_tag'/>
</filesystem>

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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