Commit Graph

25 Commits

Author SHA1 Message Date
Nick Cao
0814089e05
nixos/zram: use nixos/zram-generator as backing implementation 2023-08-13 15:38:40 +08:00
Nick Cao
cd3ffbdfe6
nixos/zram: add writebackDevice option and corresponding test 2023-03-21 09:26:27 +08:00
Nick Cao
341770d3f1
nixos/zram: fix default swapDevices 2023-02-07 09:16:16 +08:00
Nick Cao
3d26221082
nixos/zram: use zram-generator 2023-02-04 10:33:06 +08:00
Linus Heckemann
2ee8b6ee74
Merge pull request #188958 from lheckemann/zram-builtin
nixos/zram: support built-in zram
2022-12-09 19:57:44 +01:00
Pascal Bach
e18ee6fb2f
Merge pull request #189111 from rapenne-s/zram_doc
zram module: rewording documentation to avoid misconception
2022-09-02 08:23:20 +02:00
Solène Rapenne
23264904d8 zram module: rewording documentation to avoid misconception 2022-08-31 15:15:02 +02:00
Linus Heckemann
be07c1bad9 nixos/zram: support built-in zram 2022-08-30 14:12:45 +02:00
pennae
6039648c50 nixos/*: automatically convert option docs 2022-08-19 22:40:58 +02:00
pennae
a4fdff515b nixos/*: turn inline code blocks into more appropriate things 2022-08-19 22:40:58 +02:00
pennae
2e751c0772 treewide: automatically md-convert option descriptions
the conversion procedure is simple:

 - find all things that look like options, ie calls to either `mkOption`
   or `lib.mkOption` that take an attrset. remember the attrset as the
   option
 - for all options, find a `description` attribute who's value is not a
   call to `mdDoc` or `lib.mdDoc`
 - textually convert the entire value of the attribute to MD with a few
   simple regexes (the set from mdize-module.sh)
 - if the change produced a change in the manual output, discard
 - if the change kept the manual unchanged, add some text to the
   description to make sure we've actually found an option. if the
   manual changes this time, keep the converted description

this procedure converts 80% of nixos options to markdown. around 2000
options remain to be inspected, but most of those fail the "does not
change the manual output check": currently the MD conversion process
does not faithfully convert docbook tags like <code> and <package>, so
any option using such tags will not be converted at all.
2022-07-30 15:16:34 +02:00
Luke Granger-Brown
ad62155cb6 nixos/zram: add zramSwap.memoryMax option
This allows capping the total amount of memory that will be used for
zram-swap, in addition to the percentage-based calculation, which is
useful when blanket-applying a configuration to many machines.

This is based off the strategy used by Fedora for their rollout of
zram-swap-by-default in Fedora 33
(https://fedoraproject.org/wiki/Changes/SwapOnZRAM), which caps the
maximum amount of memory used for zram at 4GiB.

In future it might be good to port this to the systemd zram-generator,
instead of using this separate infrastructure.
2020-11-25 13:43:38 +00:00
Graham Christensen
bc49a0815a
utillinux: rename to util-linux 2020-11-24 12:42:06 -05:00
zowoq
f4852591c1
nixos/zram: make zstd the default (#87917) 2020-05-21 21:30:03 +03:00
Danylo Hlynskyi
ef1911d045 zram: revert "change default algorithm to zstd" (#56856)
19.03 default kernel is still 4.14, which doesn't support zstd. So,
zramSwap in current fasion fails on default kernel.
2019-03-07 02:11:20 +02:00
danbst
34a764ce87 zramSwap: remove basic.target for zram devices
This creates a dependency cycle when used with boot.tmpOnTmpfs:
basic.target <- tmp.mount <- swap.target <- zram-init-dev0 <- basic.target

This same fix is done already for tmp.mount

Fixes https://github.com/NixOS/nixpkgs/issues/47474
2019-01-17 21:18:45 +02:00
danbst
8d8a7210e4 zramSwap: allow configure compression algorithm + cleanups
- add `zramSwap.algorithm` option, which allows to change compressor
declaratively. zstd as default
- add `zramSwap.swapDevices` option, which allows to define how many zram
devices will be used as swap. Rest devices can be managed freely
- simpler floating calculations
- fix udev race condition
- some documentation changes
- replaced `/sys/block/zram*` handling with `zramctl`, because I had occasional
"Device is busy" error (looks like zram has to be configured in predefined order)
- added `memoryPercent` and `algorithm` as restart triggers. I think, it was
a bug that changing `memoryPercent` in configuration wasn't applied immediately.
- removed a bind to .swap device. While it looks natural (when swap device goes
off, so should zram device), it wasn't implemented properly. This caused problems
with swapon/swapoff:
```
$ cat /proc/swaps
Filename                                Type            Size    Used    Priority
/dev/zram0                              partition       8166024 0       -2
/var/swapfile                           file            5119996 5120    1

$ sudo swapoff -a

$ sudo swapon -a
swapon: /dev/zram0: read swap header failed

$ cat /proc/swaps
Filename                                Type            Size    Used    Priority
/var/swapfile                           file            5119996 0       1
```
2019-01-17 15:58:53 +02:00
Wout Mertens
8e3a14549f
zramSwap: remove mentions of old kernels 2018-04-19 16:53:40 +02:00
Wout Mertens
dd5e2a08fb
zramSwap: default to 1 device
One device per cpu is only needed for kernel 3.14
2018-04-19 16:44:08 +02:00
Shea Levy
fec543436d
nixos: Move uses of stdenv.shell to runtimeShell. 2018-03-01 14:38:53 -05:00
Nikolay Amiantov
5ff6e98486 modprobe service: drop kmod wrapper 2016-08-19 17:56:49 +03:00
Shea Levy
9adad8612b Revert "Merge branch 'modprobe-fix' of git://github.com/abbradar/nixpkgs"
Was meant to go into staging, sorry

This reverts commit 57b2d1e9b0, reversing
changes made to 760b2b9048.
2016-08-15 19:05:52 -04:00
Nikolay Amiantov
b2ebecd9e5 modprobe service: drop kmod wrapper 2016-08-16 00:19:25 +03:00
Roger Qiu
5d3b1b84f5 zram: simplified totalmem calculation for zram.nix 2016-01-29 22:41:20 +11:00
Ricardo M. Correia
cd1b48bc35 nixos: Add zram swap module
This allows you to use the Linux kernel's built-in compressed memory as
swap space functionality.

It is recommended to enable only for kernel 3.14 (which is when zram came out of
the staging drivers area) or higher.
2014-05-06 20:04:22 +02:00