* changes:
lmkd: Select in-kernel vs userspace lmk based on kernel driver presence
lmkd: Implement kill timeout
lmkd: Allow killing multiple processes to downgrade memory pressure
lmkd: Detect the highest level of vmpressure when event is detected
lmkd: Close cgroup.event_control file when done writing
lmkd: Remove stale dependency on libprocessgroup
lmkd: Add ability to trace lmkd kills
lmkd: add logic to kill the heaviest of the eligible processes
lmkd: change defaults to disable event upgrade/downgrade logic
lmkd: add ability to monitor all vmpressure events
mapSysfsString return code is checked for negativity after being casted
to unsigned enum type, which will always be false. This is obviously
unintended behaviour.
Fixes tautological-unsigned-enum-zero-compare warning.
Bug: 72331526
Test: m
Change-Id: Icec76d7a1121cb56fd9d05feb70cede69954c322
(cherry pick from commit 979591b627)
Currently selection criteria for in-kernel vs userspace lmk is kernel
driver presence and device not being a Go device. This change removes
Go device check leaving kernel driver presence to be the only selection
criteria.
Bug: 71502948
Change-Id: I394a7920433a8d090e207ea86296356413a63fe7
Merged-In: I394a7920433a8d090e207ea86296356413a63fe7
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
(cherry pick from commit caa2dc56fd)
New ro.lmk.kill_timeout_ms property defines timeout in ms after a
successful kill cycle for more kills to be considered. This is
necessary because memory pressure after a kill does not go down
instantly and system needs time to reflect new memory state. This
timeout prevents extra kills in the period immediately after a
kill cycle. By default it is set to 0 which disables this feature.
Bug: 63631020
Test: alloc-stress
Change-Id: Ia847118c8c4a659a7fc38cd5cd0042acb514ae28
Merged-In: Ia847118c8c4a659a7fc38cd5cd0042acb514ae28
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
(cherry pick from commit 65f54a2665)
Record free memory at low vmpressure levels and whenever pressure
increases beyond low free up enough memory to downgrade memory pressure
to low. This is done by freeing enough memory to get to the max free
memory levels seen during low vmpressure.
The kill logic for Go devices is not changed as these devices are designed
to operate under high memory pressure.
Bug: 63631020
Test: alloc-stress
Change-Id: Ic8396eee08013b1c709072a13525601d5c8bf1f1
Merged-In: Ic8396eee08013b1c709072a13525601d5c8bf1f1
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
(cherry pick from commit e82e15c242)
lmkd checks for vmpressure events using epoll_wait() with eventfds of
all registered events. It's possible that multiple events of different
priorities happen before epoll_wait() returns. For these cases we
use conservative approach by assuming that the system is under the
highest registered vmpressure levels. This speeds up lmkd response time
to high memory pressure by not responding to possibly stale low pressure
levels when vmpressure rises quickly.
Bug: 63631020
Test: alloc-stress
Change-Id: I79a85c3342e7e1b3a3be82945266b2cc60b437cf
Merged-In: I79a85c3342e7e1b3a3be82945266b2cc60b437cf
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
(cherry pick from commit 1bd2fc4fb6)
After events are specified by writing into cgroup.event_control file
the file should be closed.
Change-Id: Id015e6a7bac2b74bbc8d8793c85f529ee00bdf55
Merged-In: Id015e6a7bac2b74bbc8d8793c85f529ee00bdf55
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
(cherry pick from commit c71355991d)
For tracing lmkd kills inside kernel it is useful to have traces
indicating when and which process lmkd is killing. By default the
tracing is disabled.
Bug: 63631020
Test: alloc-stress
Change-Id: I3ceb2bde0c292eec55855cb4535927f3b4c5d08b
Merged-In: I3ceb2bde0c292eec55855cb4535927f3b4c5d08b
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
(cherry pick from commit 662492ab1d)
Killing the most memory-demanding process from the set of eligible
processes yields better results on high-performance devices than
killing the first one we could find. This is in line with how in-kernel
lowmemorykiller driver chooses its victims.
Bug: 63631020
Test: alloc-stress
Change-Id: Ie1ef7f33f3e79698a9b4120c14490386d6129f9b
Merged-In: Ie1ef7f33f3e79698a9b4120c14490386d6129f9b
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
(cherry pick from commit ad2fd9150b)
vmpressure upgrade/downgrade logic based on swap utilization works well
for low memory devices because of a small swap size, however for high
performance devices this measure is not a good indication of the memory
pressure because of large swap resources. This change sets the default
levels to disable upgrade/downgrade logic by default and each device
can set these properties appropriately.
Bug: 63631020
Test: alloc-stress
Change-Id: Ifd4fbd4d6bb3e82f0f87b029df94934f1e7b1c9c
Merged-In: Ifd4fbd4d6bb3e82f0f87b029df94934f1e7b1c9c
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
(cherry pick from commit 96bf3a600c)
Ability to monitor all available vmpressure event levels is needed
to accommodate systems with different memory resources. Low memory
systems can rely on medium and critical level events because working
under memory pressure is usual mode of operation. High performance
systems with more memory need to react earlier using also low
vmpressure level events to free memory early and prevent low memory
condition affecting its performance.
Bug: 63631020
Test: alloc-stress
Change-Id: I0cef1bd4c97d32c005045ae47f0ce3464ed98899
Merged-In: I0cef1bd4c97d32c005045ae47f0ce3464ed98899
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
We should only allow vendor-init-settable properties to be set from
.prop files on /vendor and /odm.
Bug: 73905119
Test: test on walleye that disallowed properties are rejected
Change-Id: I2a5d244fdc71060ddda3e3d87442e831e6b97831
Currently we only report why a property set call has failed but drop
the context of what was trying to set the property. This change
adds information about why a property was trying to be set when it
fails.
It also unifies property_set() within init to go through the same
HandlePropertySet() function as normal processes do, removing unneeded
special cases.
Test: boot bullhead
Test: attempt to set invalid properties and see better error messages
Change-Id: I5cd3a40086fd3b226e9c8a5e3a84cb3b31399c0d
Added by I7255d45335fa009dc9e5de99dff67af52bd70e06
Bug: None
Test: Ran the analyzer. Complaint is gone.
Change-Id: Id9b8debd8b9690210f5a8e19154ee3a5095b8fbd
Add a way to test LeakSanitizer with the server by adding an
environment variable that intentionally leaks.
Test: ASAN_OPTIONS=detect_leaks=1:leak_check_at_exit=1 ADB_LEAK=1 adb server nodaemon
Change-Id: I7255d45335fa009dc9e5de99dff67af52bd70e06
