nixpkgs/pkgs/build-support/vm
Alyssa Ross 0acf53bdb1
runInLinuxVM: set 9p msize to 128K
This fixes the following warning from QEMU, by using the value that
will be the default in newer kernels[1].

> 9p: degraded performance: a reasonable high msize should be chosen
> on client/guest side (chosen msize is <= 8192). See
> https://wiki.qemu.org/Documentation/9psetup#msize for details.

For a runInLinuxVM derivation I have that does a large amount of
IO[2], this change results in a fairly small but repeatable speed
increase.

[1]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9c4d94dc9a64426d2fa0255097a3a84f6ff2eebe
[2]: https://spectrum-os.org/git/spectrum/tree/installer/default.nix?id=06dd70500a9e475d23e3296dddf409d84abf9b9c#n52
2021-12-17 07:52:11 +00:00
..
deb
rpm
default.nix runInLinuxVM: set 9p msize to 128K 2021-12-17 07:52:11 +00:00
test.nix