Re: [linus:master] [eventfs] 852e46e239: BUG:unable_to_handle_page_fault_for_address

[Linus Torvalds <torvalds@linux-foundation.org>]

On Wed, 31 Jan 2024 at 07:58, Steven Rostedt <rostedt@goodmis.org> wrote:
>
> BTW, I ran my full test suite on your patches with the below updates and it
> all passed.

Those patch updates all look sane to me.

> I can break up and clean up the patches so that they are bisectable, and if
> that passes the bisectable portion of my tests, I can still send them to
> you for 6.8.

Ack. That series you posted looks fine. I didn't do any actual testing
or applying the patches, just looking at them.

The one thing I noticed is that the 'llist' removal still needs to be
done. The logical point is that "[PATCH v2 7/7]" where the
eventfs_workfn stuff is ripped out.

And the 'rcu' head should now be a union with something that is no
longer used after the last kref. The only thing that *is* used after
the last kref is the "is_freed" bit, so there's lots of choice. Using
the 'struct list_head listl' that is used for the child list would
seem to be the obvious choice, but it could be anything (including all
of the beginning of that eventfs_inode, but then you would need to
group that as another nested unnamed struct, so picking a "big enough"
entry like 'list' makes it syntactically simpler.

               Linus