RE: [Xen-devel] HVM domain with write caching going on somewhere todisk

["James Harper" <james.harper@xxxxxxxxxxxxxxxx>]

> 
> I just changed the open in block.c to include O_DIRECT, but it fails
to
> boot. The VNC session flashes up very quickly and I can definitely see
> the BIOS there but nothing else.
> 
> I'll have a look a bit further tomorrow...
> 

The reason it was failing was that O_DIRECT requires the buffer to the
read() and write() function to be page aligned. I have put some bounce
buffer code into raw_read() and raw_write() in block.c, which does this
(very inefficiently of course), and still get the same error, so maybe
this isn't the problem after all...

Any other suggestions?

Thanks

James


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