Ubuntu 23.04 (Lunar Lobster) has reached end of life, so this bug will
not be fixed for that specific release.
** Changed in: linux (Ubuntu Lunar)
Status: Fix Committed => Won't Fix
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https://bugs.launchpad.net/bugs/2022354
Title:
sysfs msi_irqs directory empty with kernel-5.19 when being a xen guest
Status in linux package in Ubuntu:
Confirmed
Status in linux source package in Kinetic:
Won't Fix
Status in linux source package in Lunar:
Won't Fix
Bug description:
== SRU Justification ==
Impact: See below
Fix: Upstream commit from v6.4-rc4 cherry-picked into 5.19 and 6.2
Test case: Check of sysfs running Xen.
Regression potential: Change adds additional calls to populate sysfs
related to MSI devices. Any issues would be withing those limits.
--- Original Description ---
Let's say you launch a Xen-based EC2 instance with enhanced
networking, then under kernel-5.19 you'll not see anything under
$ ls /sys/class/net/ens3/device/msi_irqs/
This can be fixed by backporting
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=335b4223466dd75f9f3ea4918187afbadd22e5c8
(It got already backported to 6.1 and 6.3)
With this patch applied, you'll correctly see the sysfs files:
$ ls /sys/class/net/ens3/device/msi_irqs/
690 691 692 693 694 695 696 697 698
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