Re: Xen NIC driver have page_pool memory leaks

[Paul Durrant <xadimgnik@xxxxxxxxx>]

On 25/03/2024 12:21, Jesper Dangaard Brouer wrote:
> Hi Arthur,
>
> (Answer inlined below, which is custom on this mailing list)
>
> On 23/03/2024 14.23, Arthur Borsboom wrote:
> > Hi Jesper,
> >
> > After a recent kernel upgrade 6.7.6 > 6.8.1 all my Xen guests on Arch
> > Linux are dumping kernel traces.
> > It seems to be indirectly caused by the page pool memory leak
> > mechanism, which is probably a good thing.
> >
> > I have created a bug report, but there is no response.
> >
> > https://bugzilla.kernel.org/show_bug.cgi?id=218618
> >
> > I am uncertain where and to whom I need to report this page leak.
> > Can you help me get this issue fixed?
> I'm the page_pool maintainer, but as you say yourself in comment 2 then
> since dba1b8a7ab68 ("mm/page_pool: catch page_pool memory leaks") this
> indicated there is a problem in the xen_netfront driver, which was
> previously not visible.
>
> Cc'ing the "XEN NETWORK BACKEND DRIVER" maintainers, as this is a driver
> bug.  What confuses me it that I cannot find any modules named
> "xen_netfront" in the upstream tree.
You should have tried '-' rather than '_' :-)

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/net/xen-netfront.c