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Since Linux Kernel 4.12 the lowmemorykiller driver has been removed and instead userspace lmkd daemon performs these tasks. Android Properties. lmkd can be configured on a particular system using the following Android properties: ro.config.low_ram: choose between low-memory vs high-performance device. Default = false.
The prop setting was working fine through Magisk, but "lmkd --reinit" is also required after reboot. After this the changes are taking effect. I mainly wanted to go back to the old lmk by setting "ro.lmk.use_minfree_levels true" so that I could disable ZRAM without the lmkd killing everything like crazy because ZRAM is low (0).
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Does userspace lmkd support legacy mode?
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Apr 30, 2024 · The LMK driver hooked into the slab shrinker API, which wasn't designed for heavy operations such as searching for targets and killing them, which slowed down the vmscan process. Userspace lmkd. The userspace lmkd implements the same functionality as the in-kernel driver but uses existing kernel mechanisms to detect and estimate memory pressure.
In legacy mode, lmkd kill decisions are made based on free memory and file cache thresholds. This mode is enabled by setting the ro.lmk.use_minfree_levels property to true. Configuring lmkd for specific device. Configure lmkd with the following properties: *Note: *mem_pressure = RAM usage / RAM_and_swap usage in % Here is a device configuration ...
Oct 3, 2016 · If it does then CM is running some really aggressive values for LMK (maybe update to something newer or build the rom with modified values). If it doesn't means one of your apps is telling android it needs ram and android (maybe due to poorly set dalvik or hwui heaps, or kernel lmk values) freaks out and just starts the mass murder of processes.
Nov 21, 2021 · Furthermore it is worth noting that the mentioned constants are relevant only for the LMKD legacy mode, e.g. in case of property ro.lmk.use_minfree_levels being set to true. Exploring the LMKD documentation you may find that there are at least 2 alternatives out there: using vmpressure signals; using PSI (pressure stall information) monitors
lmkd can be configured on a particular system using the following Android properties: ro.config.low_ram: choose between low-memory vs high-performance device. Default = false. ro.lmk.use_minfree_levels: use free memory and file cache thresholds for making decisions when to kill. This mode works the same way kernel lowmemorykiller driver used to ...
