Re: [Qemu-devel] [PATCH 5/5] megasas: LSI Megaraid SAS emulation

[Paolo Bonzini]

On 07/06/2011 08:20 AM, Hannes Reinecke wrote:
> > We cannot map control structures from guest memory and treating them
> > as valid request state later on.
> Yes, I've been working on that one already.
> What I'll be doing is to read in the sge count during 'map_sgl' and
> store this value internally (in ->iov_cnt). And during unmap I'll be
> using this value instead of the frame-provided one.
>
> That way we'll be checking the sge_count field only once when we slurp
> in the entire frame.

Note the flags too.  Perhaps it's easier to simply copy the entire frame 
header...

Paolo