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Re: [dm-devel] Barrier support in device mapper



Andi Kleen wrote:
>> The mail I replied to contains links to all mentioned patches:
>>
>>> [1] http://lkml.org/lkml/2008/2/15/125
>>> [2] http://article.gmane.org/gmane.linux.kernel.device-mapper.devel/5941
> 
> That's just a description, where are the patches?

http://article.gmane.org/gmane.linux.kernel.device-mapper.devel/5942
http://article.gmane.org/gmane.linux.kernel.device-mapper.devel/5943
http://article.gmane.org/gmane.linux.kernel.device-mapper.devel/5944
http://article.gmane.org/gmane.linux.kernel.device-mapper.devel/5945

> Are they equivalent in the single disk case to my patch?
It transforms barrier to normal bio with following zero-size barrier bio.
For the one disk case effect is the same of course.

Milan


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