Re: [Xen-devel] something about blktap when using the kernel 3.0+

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Tue, 2012-03-20 at 08:42 +0000, hxkhust wrote:
>   Hi,
> 
> I'm sorry to ask some little questions to you again.
> The following words are mentioned In your last email.
> >Newer kernels (e.g. mainline 3.0+) do not have any blktap at all, In
> >this case xl will fallback automatically to using the "qdisk" backend
> >provided by qemu (be aware that the performance of this is not great)
> 
> Where do you know that?(which is helpful for me)Don't the blktap and
> blktap2 under direction "tools" work in the kernel 3.0+?(I just find
> they are compiled...)

These are the userspace tools half of blktap1 and blktap2. blktap also
requires a kernel driver which is not present in mainline 3.0+, it was
this kernel part that I was referring to above.

Ian.





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