** Also affects: irqbalance (Ubuntu Trusty)
Importance: Undecided
Status: New
** Changed in: irqbalance (Ubuntu Trusty)
Status: New => Won't Fix
** Changed in: irqbalance (Ubuntu Trusty)
Status: Won't Fix => Triaged
** Changed in: irqbalance (Ubuntu)
Status: Triaged => Won't Fix
** Changed in: irqbalance (Ubuntu Trusty)
Importance: Undecided => High
** Changed in: irqbalance (Ubuntu Trusty)
Assignee: (unassigned) => Manoj Iyer (manjo)
** Description changed:
On HP M800 server cartridge we want to prevent irqbalance from running
because it causes degradation in network throughput.
+
+ [Development Fix]
+
+ Intentionally not done; see below.
+
+ [Stable Fix]
+
+ Patch to exit irqbalance if this particular hardware is detected.
[ SRU EXCEPTION REQUEST ]
A fix to this bug is limited in scope to 14.04 (Trusty) release. TI does not
plan to support the Keystone II based Slayton platform beyond 14.04. TI has not
upstreamed any kernel patches for this platform, instead, canonical is
maintaining a 3.13 based linux-keystone flavor kernel to support Slayton. TI
would be required to upstream all patches related to keystone II and Slayton if
they need to extend support for their platform past 14.04. Therefore, the scope
of this patch would also be limited to 14.04, and we request an exception from
the SRU team to accept this patch in 14.04.
SRU TEMPLATE
============
[Impact]
* With irqbalance running on Slayton (HP M800 server) it degrades network
performance.
[Testcase]
* To recreate this network performance degradation you need to execute the
SRIO testcases provided by TI.
* After applying the patch run irqbalance command and it should emit a
message to /var/log/syslog: May 7 19:56:13 ms10-18n3-slayton ./irqbalance:
Balancing is ineffective on HP ProLiant m800 Server Cartridge. and exit
gracefully.
[Regression Potential]
* None, this change is limited to HP M800 server cartridge
--
You received this bug notification because you are a member of Ubuntu
Server Team, which is subscribed to the bug report.
https://bugs.launchpad.net/bugs/1452875
Title:
irqbalance degrades network performance on HP M800 server cartridge
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/irqbalance/+bug/1452875/+subscriptions
--
Ubuntu-server-bugs mailing list
Ubuntu-server-bugs@lists.ubuntu.com
Modify settings or unsubscribe at:
https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
