There are simple shell scripts and oneshot systemd services to enable or disable multigenerational LRU at boot time or on the fly, and to get the current state of mg-LRU.
MGLRU Patches Merged To "mm-stable" Ahead Of Linux 6.1
Run mglru (get the current state), set_mglru N (enable/disable mg-LRU), and set_min_ttl_ms M. You can add the oneshot service to startup.
Get the current state:
$ mglru
#!/bin/sh -ev
cat /sys/kernel/mm/lru_gen/enabled
0x0007
cat /sys/kernel/mm/lru_gen/min_ttl_ms
1000
Disable multigenerational LRU:
$ set_mglru 0
#!/bin/sh -ev
echo $1 | sudo tee /sys/kernel/mm/lru_gen/enabled
0
Enable multigenerational LRU:
$ set_mglru 1
#!/bin/sh -ev
echo $1 | sudo tee /sys/kernel/mm/lru_gen/enabled
1
Apply all the multigenerational LRU features:
$ set_mglru y
#!/bin/sh -ev
echo $1 | sudo tee /sys/kernel/mm/lru_gen/enabled
y
set_mglru takes values from 0 to 7 and [yYnN] (since MGLRU v7). Most users should enable or disable all the features unless some of them have unforeseen side effects.
Set min_ttl_ms:
$ set_min_ttl_ms 2000
#!/bin/sh -v
echo $1 | sudo tee /sys/kernel/mm/lru_gen/min_ttl_ms
2000
Enable/disable multigenerational LRU during system boot:
$ sudo systemctl enable mglru.serviceBy default it sets /sys/kernel/mm/lru_gen/enabled to Y and /sys/kernel/mm/lru_gen/min_ttl_ms to 1000.
Edit the unit file using systemctl (to change enabled and min_ttl_ms values):
$ sudo systemctl edit mglru.service --fullInstall
$ git clone https://github.com/hakavlad/mg-lru-helper.git
$ cd mg-lru-helper
$ sudo make installUninstall
$ sudo make uninstall- https://github.com/xanmod/linux (https://xanmod.org)
- https://github.com/zen-kernel/zen-kernel (https://liquorix.net)
- https://gitlab.com/post-factum/pf-kernel/-/wikis/README
Multigenerational LRU Framework at LKML:
- v1: https://lore.kernel.org/lkml/20210313075747.3781593-1-yuzhao@google.com/
- v2: https://lore.kernel.org/lkml/20210413065633.2782273-1-yuzhao@google.com/
- v3: https://lore.kernel.org/lkml/20210520065355.2736558-1-yuzhao@google.com/
- v4: https://lore.kernel.org/lkml/20210818063107.2696454-1-yuzhao@google.com/
- v5: https://lore.kernel.org/lkml/20211111041510.402534-1-yuzhao@google.com/
- v6: https://lore.kernel.org/lkml/20220104202227.2903605-1-yuzhao@google.com/
- v7: https://lore.kernel.org/lkml/20220208081902.3550911-1-yuzhao@google.com/
- v8: https://lore.kernel.org/lkml/20220308234723.3834941-1-yuzhao@google.com/
- v9: https://lore.kernel.org/lkml/20220309021230.721028-1-yuzhao@google.com/
- v10: https://lore.kernel.org/lkml/20220407031525.2368067-1-yuzhao@google.com/
- v11: https://lore.kernel.org/lkml/20220518014632.922072-1-yuzhao@google.com/
- v12: https://lore.kernel.org/lkml/20220614071650.206064-1-yuzhao@google.com/
- v13: https://lore.kernel.org/lkml/20220706220022.968789-1-yuzhao@google.com/
Multigenerational LRU Framework at LWN.net:
- https://lwn.net/Articles/851184/
- https://lwn.net/Articles/856931/
- https://lwn.net/Articles/881675/
- https://lwn.net/Articles/894859/
Multigenerational LRU Framework at phoronix:
- https://www.phoronix.com/scan.php?page=news_item&px=Linux-Multigen-LRU
- https://www.phoronix.com/scan.php?page=news_item&px=Multigenerational-LRU-v2
- https://www.phoronix.com/scan.php?page=news_item&px=Multigen-LRU-Framework-V3
- https://www.phoronix.com/scan.php?page=news_item&px=Multigen-LRU-v5
- https://www.phoronix.com/scan.php?page=news_item&px=Linux-MGLRU-v6-Linux
- https://www.phoronix.com/scan.php?page=news_item&px=MGLRU-Not-For-5.18
- https://www.phoronix.com/scan.php?page=news_item&px=Linux-MGLRU-v9-Promising
- https://www.phoronix.com/scan.php?page=news_item&px=MGLRU-v10
- https://www.phoronix.com/scan.php?page=news_item&px=MGLRU-v11-Linux-Perf
- https://www.phoronix.com/scan.php?page=news_item&px=MGLRU-v12-For-Linux-5.19-rc
- https://www.phoronix.com/scan.php?page=news_item&px=MGLRU-July-2022-Performance
- https://www.phoronix.com/scan.php?page=news_item&px=MGLRU-v13-More-Benchmarks
Multigenerational LRU Framework at linux.org.ru: