On 2/11/21, 4:18 PM, "Ronak Doshi" <dos...@vmware.com> wrote: > From: Todd Sabin <tsa...@vmware.com> > > Linux network stack uses an allocation page cache for skbs. The > purpose is to reduce the number of page allocations that it needs to > make, and it works by allocating a group of pages, and then > sub-allocating skb memory from them. When all skbs referencing the > shared pages are freed, then the block of pages is finally freed. > > When these skbs are all freed close together in time, this works fine. > However, what can happen is that there are multiple nics (or multiple > rx-queues in a single nic), and the skbs are allocated to fill the rx > ring(s). If some nics or queues are far more active than others, the > entries in the less busy nic/queue may end up referencing a page > block, while all of the other packets that referenced that block of > pages are freed. > > The result of this is that the memory used by an appliance for its rx > rings can slowly grow to be much greater than it was originally. > > This patch fixes that by giving each vmxnet3 device a per-rx-queue page > cache. > > Signed-off-by: Todd Sabin <tsa...@vmware.com> > Signed-off-by: Ronak Doshi <dos...@vmware.com> > --- > drivers/net/vmxnet3/vmxnet3_drv.c | 30 ++++++++++++++++++++++++------ > drivers/net/vmxnet3/vmxnet3_int.h | 2 ++ > include/linux/skbuff.h | 2 ++ > net/core/skbuff.c | 21 +++++++++++++++------ > 4 files changed, 43 insertions(+), 12 deletions(-)
Any update on this patch? Thanks, Ronak
