Public bug reported:
== SRU Justification, ARTFUL ==
Bug fix #1761104 incorrectly inverted the flag in the call to arch_add_memory,
it should be true instead of false.
== Fix ==
Fix partial backport from bug #1747069, remove can_online_high_movable
and fix the incorrectly set boolean argument to arch_add_memory().
NVIDIA are reported that this is was incorrectly flipped in the last SRU
to fix their driver support on powerpc.
== Testing ==
run ADT memory hotplug test, should not regress this. Without the fix,
the nvidia driver on powerpc will not work. With the fix it loads and
works.
== Regression Potential ==
This fixes a regression in the original fix and hence the regression
potential is the same as the previously SRU'd bug fix for #1747069,
namely:
"Reverting this commit does remove some functionality, however this does
not regress the kernel compared to previous releases and having a
working reliable memory hotplug is the preferred option. This fix does
touch some memory hotplug, so there is a risk that this may break this
functionality that is not covered by the kernel regression testing."
** Affects: linux (Ubuntu)
Importance: High
Assignee: Colin Ian King (colin-king)
Status: In Progress
** Changed in: linux (Ubuntu)
Status: New => In Progress
** Changed in: linux (Ubuntu)
Importance: Undecided => High
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Colin Ian King (colin-king)
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https://bugs.launchpad.net/bugs/1772617
Title:
fix inverted boolean flag in arch_add_memory, reverts back to original
behaviour
Status in linux package in Ubuntu:
In Progress
Bug description:
== SRU Justification, ARTFUL ==
Bug fix #1761104 incorrectly inverted the flag in the call to
arch_add_memory, it should be true instead of false.
== Fix ==
Fix partial backport from bug #1747069, remove can_online_high_movable
and fix the incorrectly set boolean argument to arch_add_memory().
NVIDIA are reported that this is was incorrectly flipped in the last
SRU to fix their driver support on powerpc.
== Testing ==
run ADT memory hotplug test, should not regress this. Without the fix,
the nvidia driver on powerpc will not work. With the fix it loads and
works.
== Regression Potential ==
This fixes a regression in the original fix and hence the regression
potential is the same as the previously SRU'd bug fix for #1747069,
namely:
"Reverting this commit does remove some functionality, however this
does not regress the kernel compared to previous releases and having a
working reliable memory hotplug is the preferred option. This fix does
touch some memory hotplug, so there is a risk that this may break this
functionality that is not covered by the kernel regression testing."
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1772617/+subscriptions
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