On Tue, 22 Sep 2026, Jeff Layton wrote: > Currently much of nfsd's administration is serialized under the global > nfsd_mutex, even though most of the objects managed under it are > segregated by net namespace. > > This patchset does a couple of small cleanups and then adds a new > per-net mutex and moves all of the appropriate per-net data structures > to be protected by it instead of the global mutex. The filecache is > given its own mutex, and the global mutex is renamed and left for > managing just the few remaning global objects. > > I also had an LLM cook up some selftests so we can hopefully keep all of > this working properly in the future. > > Please consider for v7.4.
Thanks for doing this Jeff - it is long past time :-) It all looks good to me - except the selftests which I didn't look at. Thanks, NeilBrown > > Thanks, > Jeff > > Signed-off-by: Jeff Layton <[email protected]> > --- > Jeff Layton (8): > nfsd: clear NFSD_NET_UP before dropping the generic resource reference > nfsd: make max_blksize a per-namespace setting > nfsd: move the control plane to a per-namespace mutex > nfsd: rename nfsd_mutex to nfsd_global_mutex > nfsd: give the open file cache its own mutex > selftests/nfsd: factor the netlink plumbing into a shared header > selftests/nfsd: add cross-namespace isolation tests > selftests/nfsd: add a cross-namespace control-plane soak > > fs/nfsd/export.c | 22 +- > fs/nfsd/filecache.c | 36 +- > fs/nfsd/netns.h | 16 + > fs/nfsd/nfs4proc.c | 4 +- > fs/nfsd/nfs4state.c | 8 +- > fs/nfsd/nfsctl.c | 129 ++--- > fs/nfsd/nfsd.h | 4 +- > fs/nfsd/nfssvc.c | 146 ++++-- > tools/testing/selftests/nfsd/Makefile | 2 + > tools/testing/selftests/nfsd/config | 6 + > tools/testing/selftests/nfsd/nfsd_netlink.h | 319 ++++++++++++ > .../testing/selftests/nfsd/nfsd_netlink_listener.c | 301 +---------- > tools/testing/selftests/nfsd/nfsd_netns_isolation | Bin 0 -> 49192 bytes > .../testing/selftests/nfsd/nfsd_netns_isolation.c | 450 ++++++++++++++++ > tools/testing/selftests/nfsd/nfsd_netns_stress | Bin 0 -> 39232 bytes > tools/testing/selftests/nfsd/nfsd_netns_stress.c | 572 > +++++++++++++++++++++ > tools/testing/selftests/nfsd/settings | 2 +- > 17 files changed, 1580 insertions(+), 437 deletions(-) > --- > base-commit: aeaddc6a3711283c09a9183068897d4fe1fb464f > change-id: 20260918-nfsd-per-net-mutex-8655764940ac > > Best regards, > -- > Jeff Layton <[email protected]> > >
