--- Comment From heinz-werner_se...@de.ibm.com 2020-06-26 02:48 EDT---
IBM Bugzilla status-> closed, Fix Released
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https://bugs.launchpad.net/bugs/1874062
Title:
[UBUNTU 20.04]
--- Comment From niklas.schne...@ibm.com 2020-05-20 09:04 EDT---
I just verified that this now works on the Ubuntu 20.04 proposed kernel. Thank
you!
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--- Comment From niklas.schne...@ibm.com 2020-04-23 04:00 EDT---
The commit mentioned in the previous comment applies cleanly to focal
master-next for me.
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--- Comment From niklas.schne...@ibm.com 2020-04-22 10:46 EDT---
It's not upstream yet, the commit just hit our public tree at
https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git/commit/?h=fixes=86dbf32da150339ca81509fa2eb84c814b55258b
It will be sent with the s390 fixes pull
--- Comment From niklas.schne...@ibm.com 2020-04-21 09:50 EDT---
This setting of the affinity leads to a performance regression
in streaming workloads which can be seen with e.g. by an
iperf streaming test between two LPARs using ConnectX-5
based nics.
In some tests the performance would
--- Comment From niklas.schne...@ibm.com 2020-04-21 09:45 EDT---
With the introduction of CPU directed interrupts the kernel
parameter pci=force_floating was introduced to fall back to
the previous behavior using floating irqs.
Furthermore this fallback is used on machines lacking
support
