[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] [PATCH] libxl: prefer qdisk over blktap when choosing disk backend

On Wed, Aug 28, 2013 at 11:35 AM, Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx> wrote:
> Wei Liu writes ("Re: [PATCH] libxl: prefer qdisk over blktap when choosing 
> disk backend"):
>> On Tue, Aug 27, 2013 at 03:22:43PM +0100, Wei Liu wrote:
>> > There are some disk formats commonly supported by both qdisk and blktap.
>> > As qdisk is better supported and blktap is unmaintained, we choose qdisk
>> > over blktap whenever possible.
> The reason for this ordering was that most kernels nowdays don't have
> blktap.  So you don't get blktap on new systems, only on old ones.
> That's good for stability I think.
> Does that make any kind of sense ?

I don't think the original reasoning makes sense.  On systems without
blktap, the order of blktap / qdisk doesn't matter in the slightest.
The order only matters on old systems, with blktap; and there it's
better to use qdisk if possible, because it's maintained and blktap


Xen-devel mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.