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
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Get min adj score when needed, instead to propagate from caller funct.
Bug:65642829
Test: tested on gobo_512
Change-Id: I87f15c5c6206d471002828a24d0462b0abb0d196
If the system has enough memory the pressure events are ignored or
downgraded from critical to medium.
Bug: 65642829
Test: tested on gobo
Change-Id: I44e66d2e35508aceee5c1719313db217b80d582e
For Go devices fallback to memcg/memory pressure events for LMK.
Go devices will use memcg pressure events while inkernel module
is disabled.
Bug: 64852905
Test: tested on gobo
Change-Id: I267ab00be85e324331f6c91551ba013184de817e
When close to oom the system tend to become very thrashy
and keeps paging. This change looks at the current working sent and
checks it against swap.
Test: tested on gobo
Bug: 64721547
Change-Id: I93d42def93cbc03a01a54988fd5286ec9f124e36
- Don't show misleading messages, add the correct description for
the reason of process killing
- Don't kill Launcher3 upgrade the score to perceptible (200)
- Limit the verbose logging
Test: tested on gobo
Bug: 64316273
Change-Id: Ic7c13853d939afe4f20cdaa5b488b6e1810f5ddf
By doing so different platforms can customize them accordingly.
For instance a low mem, 512MB device can do
ro.lmk.medium=400, while a device with more memory can keep
the default(800).
Test: tested on gobo.
Bug: 64316084
Change-Id: Ifc4f3853bc06f30488adb25883ccd9aaf683ba9b
Point to log/log.h where necessary, define LOG_TAG where necessary.
Accept that private/android_logger.h is suitable replacement for
log/logger.h and android/log.h.
Correct liblog/README
Effectively a cleanup and controlled select revert of
'system/core: drop or replace log/logger.h' and
'system/core: Replace log/log.h with android/log.h'.
Test: compile
Bug: 30465923
Change-Id: Ic2ad157bad6f5efe2c6af293a73bb753300b17a2
Should use android/log.h instead of log/log.h as a good example
to all others. Adjust header order to comply with Android Coding
standards.
Test: Compile
Bug: 26552300
Bug: 31289077
Change-Id: I33a8fb4e754d2dc4754d335660c450e0a67190fc
This will make sure we get invoked in time,
and combined with a kernel change to increase
the window size (and thus rate-limit the
notifications) based on the amount of memory
on the device, this should provide a nice
balance between receiving too many notifications
vs getting notified too late.
Change-Id: I2f5e92390b94e582aaa06d88763a232e39673496
Opening /proc/zoneinfo may return -ENOMEM under memory pressure,
assume something needs to be killed if that happens.
Bug: 16236289
Change-Id: I25aab09f4c3f2b9e176eaaeca94fd6bd790dad4e
The task selected to die may be small, add its approximate size
to other_free and other_file and keep killing until all thresholds
are met.
Bug: 16236289
Change-Id: Iceeca4c63fec98cae2bf53e258f7707cea408b07
If kswapd runs more than lmkd it may throw away all page cache pages
before lmkd gets a chance to kill a process. Make lmkd SCHED_FIFO
so it can react quickly to kernel low memory notifications.
Bug: 16236289
Change-Id: I46767b4ec81ef8638d0c9e47d168a68b62e3cac5
Use mlockall(MCL_FUTURE) to lock all lmkd pages in memory. This
avoids lmkd thrashing when the system is low on memory.
As a side effect, it will also keep the .text sections of liblog, libm,
libc, and libprocessgroup in memory at all times.
Bug: 16236289
Change-Id: Idd70557efa4b1e14bc86f14220672a30f6c956e3
After sending sigkill to the main process, also call into
libprocessgroup to kill any processes that were forked.
Bug: 15313911
Change-Id: I05577c6f5b70800ce0a01f480c8870c2c601afda
Use oom_score_adj for setting OOM score adjustment values instead
of the older, deprecated oom_adj interface.
Change-Id: I5ba7801d4b8971be092b31ae0fd8af8c3001d613
Move kernel low memory killer logic to new daemon lmkd. ActivityManager
communicates with this daemon over a named socket.
Change-Id: Ie957da7e9b1f7150e23c689fdadf23ff260b47be
Suren Baghdasaryan
Robert Benea
Mark Salyzyn
Elliott Hughes
Chih-Hung Hsieh
Martijn Coenen
Nick Kralevich
Erik Kline
Chong Zhang
Andreas Gampe
Colin Cross
Todd Poynor