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| author | Ludovic Courtès <ludo@gnu.org> | 2016-06-26 12:16:07 +0200 |
|---|---|---|
| committer | Ludovic Courtès <ludo@gnu.org> | 2016-06-26 15:29:32 +0200 |
| commit | eca69fc0d69585b6c261c621599e5d7e10034306 (patch) | |
| tree | 5f1cf58f779a7a31e5c8078914e7da763b11e59c | |
| parent | 4b670539623ce8d2578ede76d2587a5642630c08 (diff) | |
| download | guix-eca69fc0d69585b6c261c621599e5d7e10034306.tar.gz | |
doc: Clarify /dev/kvm setup.
Reported by myglc2 <myglc2@gmail.com>. * doc/guix.texi (Build Environment Setup): Mention the "kvm" group. (Invoking guix system): Use "@quotation Note" for the note about KVM; make it clear that KVM is optional.
| -rw-r--r-- | doc/guix.texi | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/doc/guix.texi b/doc/guix.texi index d6d16b4d45..9e3806c845 100644 --- a/doc/guix.texi +++ b/doc/guix.texi @@ -708,8 +708,13 @@ Bash syntax and the @code{shadow} commands): @noindent The number of build users determines how many build jobs may run in parallel, as specified by the @option{--max-jobs} option -(@pxref{Invoking guix-daemon, @option{--max-jobs}}). The -@code{guix-daemon} program may then be run as @code{root} with the +(@pxref{Invoking guix-daemon, @option{--max-jobs}}). To use +@command{guix system vm} and related commands, you may need to add the +build users to the @code{kvm} group so they can access @file{/dev/kvm}, +using @code{-G guixbuild,kvm} instead of @code{-G guixbuild} +(@pxref{Invoking guix system}). + +The @code{guix-daemon} program may then be run as @code{root} with the following command@footnote{If your machine uses the systemd init system, dropping the @file{@var{prefix}/lib/systemd/system/guix-daemon.service} file in @file{/etc/systemd/system} will ensure that @@ -10224,12 +10229,14 @@ a list of available debugging commands. @end table @end table -Note that all the actions above, except @code{build} and @code{init}, -rely on KVM support in the Linux-Libre kernel. Specifically, the -machine should have hardware virtualization support, the corresponding +@quotation Note +All the actions above, except @code{build} and @code{init}, +can use KVM support in the Linux-libre kernel. Specifically, if the +machine has hardware virtualization support, the corresponding KVM kernel module should be loaded, and the @file{/dev/kvm} device node must exist and be readable and writable by the user and by the -build users of the daemon. +build users of the daemon (@pxref{Build Environment Setup}). +@end quotation Once you have built, configured, re-configured, and re-re-configured your GuixSD installation, you may find it useful to list the operating |