Re: [Xen-devel] [PATCH 1 of 2] blkfront: sector size > 512

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

Samuel Thibault wrote:

> Stefano Stabellini, le Thu 21 May 2009 12:40:52 +0100, a Ãcrit :
>> The first and last sector as well as the sector number of the request is
>> expressed in 512 bytes units, independently from the real sector size.
>>      req->id = (uintptr_t) aiocbp;
>> -    req->sector_number = aiocbp->aio_offset / dev->info.sector_size;
>> +    req->sector_number = aiocbp->aio_offset / 512;
>>  
> 
> Oh?!
> 
> That needs to be better documented in xen/include/public/io/blkif.h,
> then.  I'm however wondering whether this shouldn't actually be fixed in
> the blkback/cdrom interface instead.
> 

Yeah, I am surprised as you are, but the linux blkfront does the same
thing so I prefer to avoid changing the protocol now.

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