Re: [Xen-devel] qemu-xen-traditional: NOCACHE or CACHE_WB to open disk images for IDE

["Xu, Dongxiao" <dongxiao.xu@xxxxxxxxx>]

> -----Original Message-----
> From: Ian Jackson [mailto:Ian.Jackson@xxxxxxxxxxxxx]
> Sent: Tuesday, August 14, 2012 10:59 PM
> To: Stefano Stabellini
> Cc: Xu, Dongxiao; xen-devel@xxxxxxxxxxxxx; Zhang, Yang Z; Ian Campbell
> Subject: RE: [Xen-devel] qemu-xen-traditional: NOCACHE or CACHE_WB to
> open disk images for IDE
> 
> Stefano Stabellini writes ("RE: [Xen-devel] qemu-xen-traditional: NOCACHE or
> CACHE_WB to open disk images for IDE"):
> > I also thought that IDE also needs NOCACHE for safety but after a
> > lengthy discussion, we came up with the conclusion that WRITEBACK is
> > OK for IDE, see your message:
> >
> > http://marc.info/?l=xen-devel&m=133311527009773
> >
> > So I think we should revert 1307e42a4b3c1102d75401bc0cffb4eb6c9b7a38,
> > I don't know why it was committed.
> 
> I was probably confused.  Sorry.  I have reverted it.

Thanks, this helps me a lot.

Thanks,
Dongxiao

> 
> > Also it seems to me that libxl is not specifying cache=writeback for
> > upstream QEMU, that means it is going to default to writethrough.
> > I'll write a patch for that.
> 
> Right, thanks.
> 
> Ian.

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel