On Fri, 2023-03-17 at 15:04 +0000, Chuck Lever III wrote:

quoted

On Mar 17, 2023, at 10:59 AM, Jeff Layton [off-list ref] wrote:

On Fri, 2023-03-17 at 14:16 +0000, Chuck Lever III wrote:

quoted

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 [off-list ref]