Re: [Qemu-devel] [PATCH RESEND for 1.4-stable] net: reduce memory allocation when multiqueue is not used

[Stefan Hajnoczi]

On Wed, Feb 20, 2013 at 06:11:33PM +0800, Jason Wang wrote:
> Edivaldo reports a problem that the array of NetClientState in NICState is too
> large - MAX_QUEUE_NUM(1024) which will waste memory even if multiqueue is not
> used.
> 
> For 1.4 we can just solve this by reduce the MAX_QUEUE_NUM to 8 which is the
> same as the current kernel (3.8+) tap queue limit. For 1.5, we will use 
> dynamic
> allocation instead.
> 
> Cc: Edivaldo de Araujo Pereira <address@hidden>
> Signed-off-by: Jason Wang <address@hidden>
> ---
> RESEND since the previous mail misses the list.
> ---
>  include/net/net.h |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)

Is dynamic allocation much more complex?  If it takes another 2 or 3
days to come up with a patch, then that would be preferrable to a static
8 queue limit.

Stefan