On Wed, Jan 03, 2024 at 01:58:03PM -0800, Jakub Kicinski wrote:
> On Tue, 26 Dec 2023 17:43:33 +0800 Xuan Zhuo wrote:
> > For rq, we have three cases getting buffers from virtio core:
> >
> > 1. virtqueue_get_buf{,_ctx}
> > 2. virtqueue_detach_unused_buf
> > 3. callback for virtqueue_resize
> >
> > But in commit 295525e29a5b("virtio_net: merge dma operations when
> > filling mergeable buffers"), I missed the dma unmap for the #3 case.
> >
> > That will leak some memory, because I did not release the pages referred
> > by the unused buffers.
> >
> > If we do such script, we will make the system OOM.
> >
> > while true
> > do
> > ethtool -G ens4 rx 128
> > ethtool -G ens4 rx 256
> > free -m
> > done
> >
> > Fixes: 295525e29a5b ("virtio_net: merge dma operations when filling
> > mergeable buffers")
> > Signed-off-by: Xuan Zhuo <xuanz...@linux.alibaba.com>
>
> Michael, Jason, looks good? Worth pushing it to v6.7?
I'd say yes.
Acked-by: Michael S. Tsirkin <m...@redhat.com>
