1. let logs be written to statsd directly like all other stats logs.
+ stats log should not write to logd anymore(b/78239479)
2. fixed the log format
+ need to embed the elapsed real time in the log
3. fixed the log context reuse problem
+reset the log context buffer and internal state before reuse
Bug: 78603347
Bug: 78239479
Test: tested with alloc_stress, and saw logs written to statsd
performance measurement (memory & cpu):
https://paste.googleplex.com/5508158646648832
Change-Id: I345f0eace8ba1687ff480fb88e9abba1d8533f76
Add ability to switch to the algorithm used by lowmemorykiller driver
for determining when to kill. It uses minfree levels to decide at which
levels of free memory and file cache to kill a process. oom_adj_score
is also determined by comparing current memory resources against minfree
levels.
ro.lmk.use_minfree_levels property is introduces for switching into this
mode. By default it is disabled.
Bug: 77299493
Bug: 75322373
Change-Id: I6b51972951026854a079fcda33d6786b7ed035e4
Merged-In: I6b51972951026854a079fcda33d6786b7ed035e4
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
(cherry picked from commit d273b6630d47d6bb32996bcc87e01a73240cb228)
Current mechanism of getting system memory state by using sysinfo()
is not enough because it does not provide information about file cache
size which is needed to correctly assess memory state. Switch to using
data from /proc/meminfo that includes information provided by sysinfo()
and file cache size in addition to that.
Bug: 77299493
Bug: 75322373
Change-Id: I16106fc4f9254f17f776803e60502b7b6474e1b7
Merged-In: I16106fc4f9254f17f776803e60502b7b6474e1b7
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
(cherry picked from commit 9ac54eb2f88a4a8fc84d1da307be93f99573ead4)
/proc/zoneinfo and /proc/meminfo contain information necessary for lmkd
to assess system memory state. Add routines to parse these files.
Bug: 77299493
Bug: 75322373
Change-Id: Ie7d80bbb81fd0d2fc0629f6f678e6afc97fed1f6
Merged-In: Ie7d80bbb81fd0d2fc0629f6f678e6afc97fed1f6
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
(cherry picked from commit da0bc05b2293095c4e1153268ae7b53773f8f5ed)
Set F() capability set and 'drop' lmkd from AID_ROOT to AID_LMKD uid
and from AID_ROOT to AID_LMKD and AID_SYSTEM gid.
/dev/memcg/memory.pressure defaults to root.root mode 0000, set it up
as root.system mode 0040 to allow lmkd read access.
Instrument failure to set SCHED_FIFO.
Annotate access points that require elevated capabilities.
Test: check /proc/`pidof lmkd`/status for capability set
Test: lmkd_unit_test
Bug: 77650566
Change-Id: I986081a0434cf6e842b63a55726380205b30a3ea
To check system memory state lmkd is using same files every time vmpressure
event is received. Instead of opening and closing these files every time
we store the file descriptor and use pread() to reread the file from
the beginning.
Bug: 77299493
Bug: 75322373
Change-Id: I8e27f8b9526e82e3cc313a02fce215c2e4dd3d29
Merged-In: I8e27f8b9526e82e3cc313a02fce215c2e4dd3d29
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
(cherry picked from commit d716fe3610aae8cefcc676ade00c7bfd2b823c20)
lmkd should use ro.lmk.kill_heaviest_task property to select between
algorithms for victim selection. Set ro.lmk.kill_heaviest_task default
value to false in order to keep it compatible with previous versions
of lmkd (killing the heaviest task is a new mechanism).
Bug: 77299493
Bug: 75322373
Change-Id: I78d2dc79d9c54e636c26665605518d9c87b535b3
Merged-In: I78d2dc79d9c54e636c26665605518d9c87b535b3
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
(cherry picked from commit 818b59b2292f87c3781a6f7a288d10e2453b0d13)
Rename is_go_device variable to low_ram_device to better reflect
its meaning and relation to ro.config.low_ram variable.
Bug: 77299493
Bug: 75322373
Change-Id: I6e2eaebe79cf2e6edf861f7c602e52a5b573ad0a
Merged-In: I6e2eaebe79cf2e6edf861f7c602e52a5b573ad0a
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
(cherry picked from commit fe2be6cc44073b7ef09ca849004e5072bdf18857)
Add ability to switch to the algorithm used by lowmemorykiller driver
for determining when to kill. It uses minfree levels to decide at which
levels of free memory and file cache to kill a process. oom_adj_score
is also determined by comparing current memory resources against minfree
levels.
ro.lmk.use_minfree_levels property is introduces for switching into this
mode. By default it is disabled.
Bug: 77299493
Bug: 75322373
Merged-In: I6b51972951026854a079fcda33d6786b7ed035e4
Change-Id: I6b51972951026854a079fcda33d6786b7ed035e4
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Current mechanism of getting system memory state by using sysinfo()
is not enough because it does not provide information about file cache
size which is needed to correctly assess memory state. Switch to using
data from /proc/meminfo that includes information provided by sysinfo()
and file cache size in addition to that.
Bug: 77299493
Bug: 75322373
Merged-In: I16106fc4f9254f17f776803e60502b7b6474e1b7
Change-Id: I16106fc4f9254f17f776803e60502b7b6474e1b7
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
/proc/zoneinfo and /proc/meminfo contain information necessary for lmkd
to assess system memory state. Add routines to parse these files.
Bug: 77299493
Bug: 75322373
Merged-In: Ie7d80bbb81fd0d2fc0629f6f678e6afc97fed1f6
Change-Id: Ie7d80bbb81fd0d2fc0629f6f678e6afc97fed1f6
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
To check system memory state lmkd is using same files every time vmpressure
event is received. Instead of opening and closing these files every time
we store the file descriptor and use pread() to reread the file from
the beginning.
Bug: 77299493
Bug: 75322373
Merged-In: I8e27f8b9526e82e3cc313a02fce215c2e4dd3d29
Change-Id: I8e27f8b9526e82e3cc313a02fce215c2e4dd3d29
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
lmkd should use ro.lmk.kill_heaviest_task property to select between
algorithms for victim selection. Set ro.lmk.kill_heaviest_task default
value to false in order to keep it compatible with previous versions
of lmkd (killing the heaviest task is a new mechanism).
Change-Id: I78d2dc79d9c54e636c26665605518d9c87b535b3
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Rename is_go_device variable to low_ram_device to better reflect
its meaning and relation to ro.config.low_ram variable.
Change-Id: I6e2eaebe79cf2e6edf861f7c602e52a5b573ad0a
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Move process initialization, mlockall() and sched_setscheduler() to
only occur if initialization succeeds and is enabled. This
conserves mlock'd memory and a FIFO processing slot if (deprecated)
kernel lowmemorykiller is active.
Cleanup: Android coding standard compliance.
Test: lmkd_unit_test
Bug: 33808187
Bug: 72838192
Change-Id: I51af0235c8eca4ef958ef2d83a8071ff58b49d78
lmkd_unit_test gets an selinux violation when run unprivileged:
lmkd_unit_test: type=1400 audit(0.0:???): avc: denied { search } for
name="lowmemorykiller" dev="sysfs" ino=??? scontext=u:r:shell:s0
tcontext=u:object_r:sysfs_lowmemorykiller:s0 tclass=dir
permissive=0
resulting in log noise. Check for INKERNEL_MINFREE_PATH existence
after known to be escalated as root user to suppress noise.
Test: lmkd_unit_test as unprivileged user, there should be no audits.
Change-Id: Ia5c7824e7070c98ee6eea20ca53097e4e56d61b6
We're passing a 'line' whose backing buffer is PAGE_MAX in size
into memory_stat_parse_line(). We protect overflowing the smaller
LINE_MAX 'key' buffer via some C preprocessing macros to assure
we limit the size.
Test: Local build with LMKD_LOG_STATS set for this file.
Bug: 76220622
Merged-In: I9e50d4270f7099e37a9bfc7fb9b9b95cc7adb086
Change-Id: I9e50d4270f7099e37a9bfc7fb9b9b95cc7adb086
Note: The breakage was caused by http://ag/3621623
Test: mmma system/core/lmkd/
Change-Id: I17033aeedb3183d4777dacb89ec84430ff061b3c
Bug: 74443701
(cherry picked from commit fb25ddd9c9004de9a9ebb1175a6ceaf7aeec0673)
Current kills message prints min_score_adj marked as "oom_adj" which
is confusing. This change marks it as "min_oom_adj" to be more clear.
Change-Id: If52f0fb25fe3208c928c5d6adce77c04b9f15a0e
system_server needs to register with lmkd, however it has no memory
cgroup under /dev/memcg/apps. This change detects if the process being
registered is system_server and suppresses the error message when
/dev/memcg/apps/uid_%d/pid_%d/memory.soft_limit_in_bytes file can't
be accessed.
Bug: 73483785
Test: verified logcat output
Change-Id: I03df7831f41f512ac8d3ebc46330546d08a3cbc6
Occasionally processes are killed or crash while lmkd is trying to access
their oom_score_adj file. This is not necessarily an erroneous condition
and therefore should not be reported as an error. Demoting error to a
warning with a detailed message.
Bug: 72039129
Test: verified logcat output
Change-Id: I97444ba5198c02cb7f7ba03c3af12e4aad9d233e
This change allows lmkd-test to work correctly when it's started
using absolute as well as relative path.
Change-Id: Ida58d13d66a224119a363f59cc59289f0167d3c9
Yao Chen
Mark Salyzyn
Suren Baghdasaryan
Florian Mayer
Greg Kaiser
Rajeev Kumar
TreeHugger Robot