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`nohang` package provides a highly configurable daemon for Linux which is able to correctly prevent [out of memory](https://en.wikipedia.org/wiki/Out_of_memory) (OOM) and keep system responsiveness in low memory conditions. `nohang` package provides a highly configurable daemon for Linux which is able to correctly prevent [out of memory](https://en.wikipedia.org/wiki/Out_of_memory) (OOM) and keep system responsiveness in low memory conditions.
@ -44,9 +43,10 @@ Use one of the userspace OOM killers:
- [systemd-oomd](https://man7.org/linux/man-pages/man8/systemd-oomd.service.8.html): Provided by systemd as `systemd-oomd.service` that uses cgroups-v2 and pressure stall information (PSI) to monitor and take action on processes before an OOM occurs in kernel space. It's used by default on [desktop versions of Fedora 34](https://fedoraproject.org/wiki/Changes/EnableSystemdOomd). - [systemd-oomd](https://man7.org/linux/man-pages/man8/systemd-oomd.service.8.html): Provided by systemd as `systemd-oomd.service` that uses cgroups-v2 and pressure stall information (PSI) to monitor and take action on processes before an OOM occurs in kernel space. It's used by default on [desktop versions of Fedora 34](https://fedoraproject.org/wiki/Changes/EnableSystemdOomd).
- [low-memory-monitor](https://gitlab.freedesktop.org/hadess/low-memory-monitor/): There's a [project announcement](http://www.hadess.net/2019/08/low-memory-monitor-new-project.html). - [low-memory-monitor](https://gitlab.freedesktop.org/hadess/low-memory-monitor/): There's a [project announcement](http://www.hadess.net/2019/08/low-memory-monitor-new-project.html).
- [psi-monitor](https://github.com/endlessm/eos-boot-helper/tree/master/psi-monitor): It's used by default on [Endless OS](https://endlessos.com/). - [psi-monitor](https://github.com/endlessm/eos-boot-helper/tree/master/psi-monitor): It's used by default on [Endless OS](https://endlessos.com/).
- `nohang`: nohang is earlyoom on steroids and has many useful features, see below. Maybe this is a good choice for modern desktops and servers if you need fine-tuning. It's used by default on [Garuda Linux](https://garudalinux.org/). - `nohang`: nohang is earlyoom on steroids and has many useful features, see below. Maybe this is a good choice for modern desktops and servers if you need fine-tuning. Previously it was used by default on [Garuda Linux](https://garudalinux.org/).
Use these tools to improve responsiveness during heavy swapping: Use these tools to improve responsiveness during heavy swapping:
- MGLRU patchset is merged in Linux 6.1. Setting `min_ttl_ms` > 50 can help you.
- [le9-patch](https://github.com/hakavlad/le9-patch): [PATCH] mm: Protect clean file pages under memory pressure to prevent thrashing, avoid high latency and prevent livelock in near-OOM conditions. It's kernel-side solution that can fix the OOM killer behavior. - [le9-patch](https://github.com/hakavlad/le9-patch): [PATCH] mm: Protect clean file pages under memory pressure to prevent thrashing, avoid high latency and prevent livelock in near-OOM conditions. It's kernel-side solution that can fix the OOM killer behavior.
- [prelockd](https://github.com/hakavlad/prelockd): Lock executables and shared libraries in memory to improve system responsiveness under low-memory conditions. - [prelockd](https://github.com/hakavlad/prelockd): Lock executables and shared libraries in memory to improve system responsiveness under low-memory conditions.
- [memavaild](https://github.com/hakavlad/memavaild): Keep amount of available memory by evicting memory of selected cgroups into swap space. - [memavaild](https://github.com/hakavlad/memavaild): Keep amount of available memory by evicting memory of selected cgroups into swap space.
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## How to install ## How to install
#### To install on [Fedora](https://src.fedoraproject.org/rpms/nohang/): #### To install on [Fedora](https://src.fedoraproject.org/rpms/nohang/):
```bash
$ sudo dnf install nohang-desktop Orphaned for 6+ weeks, not available.
$ sudo systemctl enable --now nohang-desktop.service
```
#### To install on RHEL 7 and RHEL 8: #### To install on RHEL 7 and RHEL 8: