On Wed, Jul 31, 2019 at 07:11:54AM -0700, Jason Thorpe wrote: > > > On Jul 31, 2019, at 1:45 AM, Edgar Fuß <e...@math.uni-bonn.de> wrote: > > > > NetBSD design error (or so Taylor says) that a vnode lock may be held > > accross I/O > > 100% > > NetBSD's VFS locking protocol needs a serious overhaul. At least one other > BSD-family VFS (the one in XNU) completely eliminated locking of vnodes at > the VFS layer (it's all pushed into the file system back-ends who now have > more control over their own locking requirements). It does have some > additional complexities around reference / busy counting and vnode identity, > but it works very well in practice. > > I don't know what FreeBSD has done in this area. > > -- thorpej >
IMNT_MPSAFE, which NFS isn't?
