[Bug 2059316] Re: backport arm64 THP improvements from 6.9

This bug is awaiting verification that the linux-nvidia/6.8.0-1007.7
kernel in -proposed solves the problem. Please test the kernel and
update this bug with the results. If the problem is solved, change the
tag 'verification-needed-noble-linux-nvidia' to 'verification-done-
noble-linux-nvidia'. If the problem still exists, change the tag
'verification-needed-noble-linux-nvidia' to 'verification-failed-noble-
linux-nvidia'.


If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.


See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: kernel-spammed-noble-linux-nvidia-v2 verification-needed-noble-linux-nvidia

--
You received this bug notification because you are subscribed to linux
in Ubuntu.
Matching subscriptions: Bgg, Bmail, Nb
https://bugs.launchpad.net/bugs/2059316

Title:
backport arm64 THP improvements from 6.9

Status in linux package in Ubuntu:
In Progress
Status in linux-nvidia package in Ubuntu:
New
Status in linux source package in Noble:
New
Status in linux-nvidia source package in Noble:
New

Bug description:
Initial support for multi-size THP landed upstream in v6.8. In the 6.9
merge window, 2 other series have landed that show significant
performance improvements on arm64

mm/memory: optimize fork() with PTE-mapped THP
  https://lkml.iu.edu/hypermail/linux/kernel/2401.3/02766.html

Transparent Contiguous PTEs for User Mappings:
 https://lwn.net/Articles/962330/

On an Ampere AltraMax system w/ 4K page size, kernel builds in a tmpfs
are reduced from 6m30s to 5m17s, a ~19% improvement.

It has been reported that this can have a *10x* improvement for
certain GPU workloads on ARM:

https://lwn.net/Articles/954094/

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2059316/+subscriptions