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...)Thank you for any response，especially when you send a copy to me besides you send the mail to the mail list. hxk _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
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.
At 2012-03-20 16:51:30,"Ian Campbell" <Ian.Campbell@citrix.com> wrote:>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. > > > >Thanks.You are so kind. hxk _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel