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

To: "Xu, Dongxiao" <dongxiao.xu@xxxxxxxxx>
From: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
Date: Tue, 14 Aug 2012 14:58:58 +0100
Cc: "Zhang, Yang Z" <yang.z.zhang@xxxxxxxxx>, Stefano Stabellini <Stefano.Stabellini@xxxxxxxxxxxxx>, Ian Campbell <Ian.Campbell@xxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxx>
Delivery-date: Tue, 14 Aug 2012 13:59:16 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>

Xu, Dongxiao writes ("RE: [Xen-devel] qemu-xen-traditional: NOCACHE or CACHE_WB 
to open disk images for IDE"):
> I attached the original patch here, which impact the performance.

Stefano, when you proposed what is now
1307e42a4b3c1102d75401bc0cffb4eb6c9b7a38 this you described it as a
major performance improvement.

Would you care to comment ?

Ian.

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References:
- [Xen-devel] qemu-xen-traditional: NOCACHE or CACHE_WB to open disk images for IDE
  - From: Xu, Dongxiao
- Re: [Xen-devel] qemu-xen-traditional: NOCACHE or CACHE_WB to open disk images for IDE
  - From: Xu, Dongxiao

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