On Wed, Apr 03, 2024 at 07:29:00AM +0200, Cedric Blancher wrote:
> On Tue, 2 Apr 2024 at 21:38, Chuck Lever <cel@xxxxxxxxxx> wrote:
> >
> > From: Chuck Lever <chuck.lever@xxxxxxxxxx>
> >
> > Jan Schunk reports that his small NFS servers suffer from memory
> > exhaustion after just a few days. A bisect shows that commit
> > e18e157bb5c8 ("SUNRPC: Send RPC message on TCP with a single
> > sock_sendmsg() call") is the first bad commit.
> >
> > That commit assumed that sock_sendmsg() releases all the pages in
> > the underlying bio_vec array, but the reality is that it doesn't.
> > svc_xprt_release() releases the rqst's response pages, but the
> > record marker page fragment isn't one of those, so it was never
> > released.
> >
> > This is a narrow fix that can be applied to stable kernels. A
> > more extensive fix is in the works.
> >
> > Reported-by: Jan Schunk <scpcom@xxxxxx>
> > Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218671
> > Fixes: e18e157bb5c8 ("SUNRPC: Send RPC message on TCP with a single sock_sendmsg() call")
>
> Is this bug present in 6.6 LTS?
It was introduced in v6.6, so yes.
~/linux $ git describe --contains e18e157bb5c8
v6.6-rc1~108^2~27
~/linux $
Once this fix is merged upstream, the LTS maintainers will notice
the Fixes: tag and backport it to v6.6 automatically.
--
Chuck Lever
