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AOSC-Dev / aosc-os-abbs

ABBS/ACBS tree for AOSC OS package metadata, build configuration, scripts, and patches
https://packages.aosc.io
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Sysctl.d settings that need reconsideration #8024

Open lunzima opened 2 months ago

lunzima commented 2 months ago

Bug description

The value of kernel.shmmax can be further expanded and used in conjunction with other settings, such as the following example (reasonable for systems of more than 2Gigs of RAM) : kernel.shmmni=512 kernel.shmmax=2147483648 kernel.shmall=1048576 kernel.sem=250 256000 100 512 kernel.msgmni=2048 kernel.msgmax=65536 kernel.msgmnb=65536

vm.mmap_min_addr could be increased to 65536 for AMD64/AArch64 and 32768 for 32-bit ARM. For other architectures, keep the default value (4096). Should vm.dirty_ratio be set to a more conservative value, such as vm.dirty_ratio=10 (default 20)? Then set vm.dirty_background_ratio to 3 or 5. You might set vm.laptop_mode=5 vm.dirty_expire_centisecs=2000 together with vm.dirty_writeback_centisecs=1500. To save a lot of power, set vm.dirty_expire_centisecs=9000 vm.dirty_writeback_centisecs=6000. This is only recommended if you have a battery/UPS!

For all net.ipv4.conf.all. and net.ipv6.conf.all. options, the corresponding net.ipv4.conf.default. and net.ipv6.conf.default. options should be set to make the options take effect on all existing and subsequently hot-plugged adapters. net.ipv4.conf.all.rp_filter=1 may not be friendly to split-tunneling or multi-hosting scenarios. A more conservative option is net.ipv4.conf.all.rp_filter=2. net.ipv4.conf.all.log_martians=1 may not be that useful to non-network administrator users.

Steps to reproduce

Not relevant

Update channel(s)

stable

Package and version

aosc-aaa 11.5.2
should affect Retro/Afterglow too.
lunzima commented 2 months ago

https://paste.aosc.io/paste/yodQezbgjXJMiueWiUChvw Some "ancestral" sysctl.conf configuration file