Hi Paul!

I guess stuff like Spectre/Meltdown can turn 1-2 days into months. ;-)

I did not want to distract you too much from that work, but you'll notice
I've sent an updated patch series against 4.16-rc7, aiming at 4.17 [1]
(it should be in your inbox).

I would really appreciate if you can find time to provide feedback on
that version.

Congratulations on the wedding!

Thanks,

Mathieu

[1] https://lkml.kernel.org/r/20180327160542.28457-1-mathieu.desnoyers@efficios.com

----- On Nov 14, 2017, at 4:32 PM, Paul Turner pjt@google.com wrote:

I have some comments that apply to many of the threads.
I've been fully occupied with a wedding and a security issue; but I'm
about to be free to spend the majority of my time on RSEQ things.
I was sorely hoping that day would be today.  But it's looking like
I'm still a day or two from being free for this.
Thank you for the extensive clean-ups and user-side development.  I
have some updates on these topics also.

- Paul

On Tue, Nov 14, 2017 at 1:15 PM, Andy Lutomirski [off-list ref] wrote:

quoted

On Tue, Nov 14, 2017 at 1:08 PM, Linus Torvalds
[off-list ref] wrote:

quoted

On Tue, Nov 14, 2017 at 12:03 PM, Mathieu Desnoyers
[off-list ref] wrote:

quoted

Here is the last RFC round of the updated rseq patchset containing:

Andy? You were the one with concerns here and said you'd have
something else ready for comparison.

I had a long discussion with Mathieu and KS and I think that this is a
good compromise.  I haven't reviewed the series all that carefully,
but I think the idea is sound.

Basically, event_counter is gone (to be re-added in a later kernel if
it really ends up being necessary, but it looks like it may primarily
be a temptation to write subtly incorrect user code and to see
scheduling details that shouldn't be readily exposed rather than a
genuinely useful feature) and the versioning mechanism for the asm
critical section bit is improved.  My crazy proposal should be doable
on top of this if there's demand and if anyone wants to write the
gnarly code involved.

IOW no objection from me as long as those changes were made, which I
*think* they were.  Mathieu?

-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com