Re: [Xen-devel] [PATCH 00/17] blktap2 related bugfix patches

[Wen Congyang <wency@xxxxxxxxxxxxxx>]

On 10/20/2014 10:25 PM, George Dunlap wrote:
> On Wed, Oct 15, 2014 at 2:05 AM, Wen Congyang <wency@xxxxxxxxxxxxxx> wrote:
>> On 10/14/2014 11:48 PM, Ian Jackson wrote:
>>> Wen Congyang writes ("[PATCH 00/17] blktap2 related bugfix patches"):
>>>> These bugs are found when we implement COLO, or rebase
>>>> COLO to upstream xen. They are independent patches, so
>>>> post them in separate series.
>>>
>>> blktap2 is unmaintained AFAICT.
>>>
>>> In the last year there has been only one commit which shows evidence
>>> of someone caring even slightly about tools/blktap2/.  The last
>>> substantial attention was in March 2013.
>>>
>>> (I'm disregarding commits which touch tools/blktap2/ to fix up compile
>>> problems with new compilers, sort out build system and file
>>> rearrangements, etc.)
>>>
>>> The file you are touching in your 01/17 was last edited (by anyone, at
>>> all) in January 2010.
>>>
>>> Under the circumstances, we should probably take all these changes
>>> without looking for anyone to ack them.
>>>
>>> Perhaps you would like to become the maintainers of blktap2 ? :-)
>>
>> Hmm, I don't have any knowledge about disk format, but blktap2 have
>> such codes(For example: block-vhd.c, block-qcow.c...). I think I can
>> maintain the rest codes.
> 
> Congyang, were you aware that XenServer has a fork of blktap is
> actually still under active development and maintainership outside of
> the main Xen tree?
> 
> git://github.com/xen-org/blktap.git
> 
> Both CentOS and Fedora are actually using snapshots of the "blktap2"
> branch in that tree for their Xen RPMs.  (I'm sure CentOS is, I
> believe Fedora is.)  It's not unlikely that the bugs you're fixing
> here have already been fixed in the XenServer fork.

How to build upstream xen with this blktap2? Copy the codes to overwrite
blktap2 in xen.git?

Thanks
Wen Congang

> 
> I think we could consider taking these patches for the 4.5 release, as
> it's obviously too late to do anything more drastic at this point.
> But I think long-term we need to sort out a better solution.  I'll
> write up an e-mail here to talk about a longer-term plan shortly...
> 
>  -George
> .
> 


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