Re: [Xen-devel] Little help with blk ring

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 23.05.12 at 01:43, Daniel Castro <evil.dani@xxxxxxxxx> wrote:
> On Tue, May 22, 2012 at 8:53 AM, James Harper <james.harper@xxxxxxxxxxxxxxxx> 
> wrote:
>> Is sizeof() what you expect it to be? That would cause the first request to 
> be (mostly) okay, but subsequent requests to be further and further out of 
> alignment.
> 
> Right on the spot!
> Here is the output of sizeof for the struct and for each member:
> SIZEOF ring_res:12 id:8 operation:1 status:2
> There is seems to be an alignment problem, them sum of members is 11,
> but the whole struct is 12, the question now is, how can I tackle this
> problem?

But sizeof is 12, as expected. There should be no place in your
code where you (directly or indirectly) sum up the individual
members' sizes.

Jan


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