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Linux 5.4-rc3

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Merge 5.4-rc3 into android-mainline

Linux 5.4-rc3

Signed-off-by: Greg Kroah-Hartman <[email protected]>
Change-Id: Ia87ba662738dd58ddb917e32c1fbd812861e7a46
This commit is contained in:
Greg Kroah-Hartman 2019-10-17 05:28:13 -07:00
commit 630839ac24
396 changed files with 3472 additions and 4619 deletions
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20
Documentation/admin-guide/cgroup-v2.rst
View file

@ -615,8 +615,8 @@ on an IO device and is an example of this type.
Protections
-----------
A cgroup is protected to be allocated upto the configured amount of
the resource if the usages of all its ancestors are under their
A cgroup is protected upto the configured amount of the resource
as long as the usages of all its ancestors are under their
protected levels. Protections can be hard guarantees or best effort
soft boundaries. Protections can also be over-committed in which case
only upto the amount available to the parent is protected among
@ -1096,7 +1096,10 @@ PAGE_SIZE multiple when read back.
is within its effective min boundary, the cgroup's memory
won't be reclaimed under any conditions. If there is no
unprotected reclaimable memory available, OOM killer
is invoked.
is invoked. Above the effective min boundary (or
effective low boundary if it is higher), pages are reclaimed
proportionally to the overage, reducing reclaim pressure for
smaller overages.
Effective min boundary is limited by memory.min values of
all ancestor cgroups. If there is memory.min overcommitment
@ -1118,7 +1121,10 @@ PAGE_SIZE multiple when read back.
Best-effort memory protection. If the memory usage of a
cgroup is within its effective low boundary, the cgroup's
memory won't be reclaimed unless memory can be reclaimed
from unprotected cgroups.
from unprotected cgroups. Above the effective low boundary (or
effective min boundary if it is higher), pages are reclaimed
proportionally to the overage, reducing reclaim pressure for
smaller overages.
Effective low boundary is limited by memory.low values of
all ancestor cgroups. If there is memory.low overcommitment
@ -2482,8 +2488,10 @@ system performance due to overreclaim, to the point where the feature
becomes self-defeating.
The memory.low boundary on the other hand is a top-down allocated
reserve. A cgroup enjoys reclaim protection when it's within its low,
which makes delegation of subtrees possible.
reserve. A cgroup enjoys reclaim protection when it's within its
effective low, which makes delegation of subtrees possible. It also
enjoys having reclaim pressure proportional to its overage when
above its effective low.
The original high boundary, the hard limit, is defined as a strict
limit that can not budge, even if the OOM killer has to be called.

4
Documentation/admin-guide/kernel-parameters.txt
View file

@ -5308,6 +5308,10 @@
the unplug protocol
never -- do not unplug even if version check succeeds
xen_legacy_crash [X86,XEN]
Crash from Xen panic notifier, without executing late
panic() code such as dumping handler.
xen_nopvspin [X86,XEN]
Disables the ticketlock slowpath using Xen PV
optimizations.