Only thread group leaders should be registered with lmkd. Add a check to
ignore any non-leader TIDs and generate an error if such condition is
detected. Run the same check before killing a process to detect cases of
non-leader TIDs being used to kill a process. This might happen if PIDs
overflow and previously registered PID gets reused for a non-leader
thread in the following scenario:
1. pid X is a thread group leader and is registered with lmkd
2. pid X dies without lmkd knowing it and pid gets recycled
3. process Y creates a thread with tid X
4. lmkd kills pid X which results in process Y being killed
Bug: 136408020
Test: lmkd_unit_test
Change-Id: I46c5a0b273f2b72cefc20ec59b80b4393f2a1a37
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Occasionally we see cases when 40ms polling is still too conservative.
Change to 10ms polling period. Since the polling happens only after PSI
signal and continues for 1sec this should not affect system performance.
Test: lmkd_unit_test
Bug: 129358844
Change-Id: Ib759b865b2104be23741fc0eacaa541e22d50dde
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Previous change If154dc364711bf7c86f32e24ddcd10be359386de called
"lmkd: Do not downgrade/ignore events when swap is full" added SwapTotal
into meminfo structure without adding the field into events.logtag file.
This results in logs which missing field and all fields starting with
"SwapFree" get reordered as a result. Fix this by adding the missing field
into events.logtag.
Bug: 129274901
Test: Confirm correct information in the logcat
Change-Id: Ia4de3790a7e9d49a0e4cba8b3161a715eaf6532e
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
200ms was too lenient when under severe memory pressure.
Test: boots, works
Bug: 127765309
Change-Id: I8e047de6318574a107720c56473ed0f25582e182
Signed-off-by: Tim Murray <timmurray@google.com>
am: e7a9fabd64 -s ours
am skip reason: change_id I4ef6433391c8758626334731d2b5de038e4468ae with SHA1 1417cdbddb is in history
Change-Id: I0b6eb14568d480b13fd0cea14863a9ad4c14c0cd
am: e7cfa67a05 -s ours
am skip reason: change_id Ie555933aafa6a6b7aa1dbf5518ebe804376e0afd with SHA1 fe31bef940 is in history
Change-Id: I3c357f360da2969e1850f32419e4b074bbe17e21
am: b68fe506e0 -s ours
am skip reason: change_id I4ef6433391c8758626334731d2b5de038e4468ae with SHA1 34c3cb84a0 is in history
Change-Id: I2521241013c39d3cc16f45b1df996135f92a053f
am: 9eee2302ee -s ours
am skip reason: change_id Ie555933aafa6a6b7aa1dbf5518ebe804376e0afd with SHA1 4dbc24d393 is in history
Change-Id: I42d2080003936bcf99fec6917fe5e52366855c07
This is to measure an application's behavior with respect to being LMKed
(the longer an app lives before being LMKed, the better).
Bug: 119854389
Test: Manual
Change-Id: I4ef6433391c8758626334731d2b5de038e4468ae
Merged-In: I4ef6433391c8758626334731d2b5de038e4468ae
(cherry picked from I4ef6433391c8758626334731d2b5de038e4468ae)
am: 962e0442d1 -s ours
am skip reason: change_id I4ef6433391c8758626334731d2b5de038e4468ae with SHA1 1417cdbddb is in history
Change-Id: I56f76418a5c6a3435dec766d731068f60bd4b642
am: 2bc24f88ca -s ours
am skip reason: change_id Ie555933aafa6a6b7aa1dbf5518ebe804376e0afd with SHA1 4dbc24d393 is in history
Change-Id: I5676596b2ee9f7448faa0b0274ac9425c7525fb0
This is to measure an application's behavior with respect to being LMKed
(the longer an app lives before being LMKed, the better).
Bug: 119854389
Test: Manual
Change-Id: I4ef6433391c8758626334731d2b5de038e4468ae
Merged-In: I4ef6433391c8758626334731d2b5de038e4468ae
(cherry picked from I4ef6433391c8758626334731d2b5de038e4468ae)
Log min_score_adj when lmkd kills a process to determine the oom_score
levels that lmkd considers during the kill.
Bug: 123024834
Change-Id: I986ae8f2808199b1654bc8d2a32dd88046c79aa3
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
lmkd can't kill processes because it has compare the size between free swap and free memory. Free swap is often larger than the free memory when system is under low memory with less swap-backed or swappable pages and finally leads to I/O thrashing.
Test: TreeHugger
Bug: 124727769
Change-Id: Ia2848859aa97a24bd13c704acee4b86cd2d3f647
Suren Baghdasaryan
Tim Murray
Xin Li
android-build-team Robot
Jim Blackler
The Android Open Source Project
Rajeev Kumar
Juju Sung