On Fri, 2023-03-17 at 15:04 +0000, Chuck Lever III wrote: > > > On Mar 17, 2023, at 10:59 AM, Jeff Layton <jlayton@xxxxxxxxxx> wrote: > > > > On Fri, 2023-03-17 at 14:16 +0000, Chuck Lever III wrote: > > > > > In the patch description, would you mention that this case > > > arises if the READ request is not page-aligned? > > > > Does it though? I'm not sure that page alignment has that much to do > > with it. I imagine you can hit this even with aligned I/Os. > > Maybe, but no-one has actually seen that. The vast majority of > reports of this problem are with unaligned I/O, which POSIX OS > NFS clients (like the Linux NFS client) usually avoid. > > I didn't mean to exclude the possibility of hitting this issue > in other ways, but simply observing a common way it is hit. > An unaligned read will consume an extra page, so maybe it just makes it more likely to overrun the array in that case? -- Jeff Layton <jlayton@xxxxxxxxxx>
