This bug was fixed in the package linux - 4.10.0-13.15
---------------
linux (4.10.0-13.15) zesty; urgency=low
[ Tim Gardner ]
* Release Tracking Bug
- LP: #1671614
* ehci-platform needed in usb-modules udeb (LP: #1671589)
- d-i: add ehci-platform to usb-modules
* irqchip/gic-v3-its: Enable cacheable attribute Read-allocate hints
(LP: #1671598)
- irqchip/gic-v3-its: Enable cacheable attribute Read-allocate hints
* iommu: Fix static checker warning in iommu_insert_device_resv_regions
(LP: #1671599)
- iommu: Fix static checker warning in iommu_insert_device_resv_regions
* QDF2400: Fix panic introduced by erratum 1003 (LP: #1671602)
- arm64: Avoid clobbering mm in erratum workaround on QDF2400
* QDF2400 PCI ports require ACS quirk (LP: #1671601)
- PCI: Add ACS quirk for Qualcomm QDF2400 and QDF2432
* tty: pl011: Work around QDF2400 E44 stuck BUSY bit (LP: #1671600)
- tty: pl011: Work around QDF2400 E44 stuck BUSY bit
* CVE-2017-2636
- tty: n_hdlc: get rid of racy n_hdlc.tbuf
* Sync virtualbox to 5.1.16-dfsg-1 in zesty (LP: #1671470)
- ubuntu: vbox -- Update to 5.1.16-dfsg-1
-- Tim Gardner <tim.gard...@canonical.com> Thu, 09 Mar 2017 06:16:24
-0700
** Changed in: linux (Ubuntu Zesty)
Status: Fix Committed => Fix Released
** CVE added: http://www.cve.mitre.org/cgi-
bin/cvename.cgi?name=2017-2636
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https://bugs.launchpad.net/bugs/1670726
Title:
h-prod does not function across cores
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Yakkety:
In Progress
Status in linux source package in Zesty:
Fix Released
Bug description:
There is a performance problem issue with h-prod. I can see that
h-prod calls are only waking hardware threads from a h-cede call when
the caller is on the same core as the thread being awoken (sibling
theads). For cross core prods the target thread remains in h-cede
until its next decrementer interrupt. That is causing guest OS some
significant dispatching delays.
The fix is now upstream as commit 8464c8842de2 ("KVM: PPC: Book3S HV:
Fix H_PROD to actually wake the target vcpu", 2016-12-06) in
v4.11-rc1.
To manage notifications about this bug go to:
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