Re: qemu-user: avoid allocations to convert stuff when not necessary

[Richard Henderson]

On 4/9/23 01:52, Michael Tokarev wrote:
> Hi!
>
> In the qemu-user case, we allocate various structures and arrays
> for conversion of data between host and guest byte orders and sizes.
> But it is actually not necessary to do such allocation when the
> *size* is the same, and only byte order is different, because the
> conversion can be done in-place.  Does it make any sense to avoid'
> allocations in such cases?

Alignment can also change.  This is especially visible with m68k guest, where even 'int' 
is 2-byte aligned.

So, no.  It's best to just allocate and convert always.


r~