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net: reduce the unnecessary memory allocation of multiqueue

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Edivaldo reports a problem that the array of NetClientState in NICState is too
large - MAX_QUEUE_NUM(1024) which will wastes memory even if multiqueue is not
used.

Instead of static arrays, solving this issue by allocating the queues on demand
for both the NetClientState array in NICState and VirtIONetQueue array in
VirtIONet.

Tested by myself, with single virtio-net-pci device. The memory allocation is
almost the same as when multiqueue is not merged.

Cc: Edivaldo de Araujo Pereira <edivaldoapereira@yahoo.com.br>
Cc: qemu-stable@nongnu.org
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Jason Wang 2013-02-22 23:15:06 +08:00 • committed by Stefan Hajnoczi
parent d26e445c80
commit f6b26cf257
3 changed files with 14 additions and 13 deletions
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2
include/net/net.h
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@ -72,7 +72,7 @@ struct NetClientState {
};
typedef struct NICState {
NetClientState ncs[MAX_QUEUE_NUM];
NetClientState *ncs;
NICConf *conf;
void *opaque;
bool peer_deleted;