nixos/doc/rl-2211: document nsncd option
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@ -77,6 +77,32 @@
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with any supported NixOS release.
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with any supported NixOS release.
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</para>
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</para>
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</listitem>
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</listitem>
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<listitem>
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<para>
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<literal>nscd</literal> functionality, necessary to provide
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non-glibc-builtin NSS modules (such as
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<literal>nss_systemd</literal> or <literal>nss_ldap</literal>)
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can now be provided by <literal>nsncd</literal>, by setting
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<literal>services.nscd.enableNsncd</literal> to
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<literal>true</literal>.
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</para>
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<para>
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The <literal>nscd</literal> daemon provided by glibc, which is
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currently used by NixOS isn’t very reliable. For example, it’s
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<link xlink:href="https://github.com/NixOS/nixpkgs/issues/135888">not
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fully possible to disable caching functionality</link>,
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causing various issues and failed lookups.
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</para>
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<para>
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In contrast to nscd’s behavior of caching module responses on
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its own, nsncd merely forwards requests to NSS modules, which
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might cache or not.
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</para>
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<para>
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We plan to use <literal>nsncd</literal> by default in NixOS
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23.05.
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</para>
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</listitem>
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<listitem>
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<listitem>
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<para>
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<para>
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<literal>emacs</literal> enables native compilation which
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<literal>emacs</literal> enables native compilation which
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@ -38,6 +38,20 @@ In addition to numerous new and upgraded packages, this release has the followin
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for a transition period so that in time the ecosystem can switch without
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for a transition period so that in time the ecosystem can switch without
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breaking compatibility with any supported NixOS release.
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breaking compatibility with any supported NixOS release.
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- `nscd` functionality, necessary to provide non-glibc-builtin NSS
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modules (such as `nss_systemd` or `nss_ldap`) can now be provided by
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`nsncd`, by setting `services.nscd.enableNsncd` to `true`.
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The `nscd` daemon provided by glibc, which is currently used by NixOS isn't
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very reliable. For example, it's [not fully possible to disable caching
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functionality](https://github.com/NixOS/nixpkgs/issues/135888), causing
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various issues and failed lookups.
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In contrast to nscd's behavior of caching module responses on its own,
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nsncd merely forwards requests to NSS modules, which might cache or not.
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We plan to use `nsncd` by default in NixOS 23.05.
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- `emacs` enables native compilation which means:
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- `emacs` enables native compilation which means:
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- emacs packages from nixpkgs, builtin or not, will do native compilation ahead of time so you can enjoy the benefit of native compilation without compiling them on you machine;
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- emacs packages from nixpkgs, builtin or not, will do native compilation ahead of time so you can enjoy the benefit of native compilation without compiling them on you machine;
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- emacs packages from somewhere else, e.g. `package-install`, will do asynchronously deferred native compilation. If you do not want this, maybe to avoid CPU consumption for compilation, you can use `(setq native-comp-deferred-compilation nil)` to disable it while still enjoy the benefit of native compilation for packages from nixpkgs.
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- emacs packages from somewhere else, e.g. `package-install`, will do asynchronously deferred native compilation. If you do not want this, maybe to avoid CPU consumption for compilation, you can use `(setq native-comp-deferred-compilation nil)` to disable it while still enjoy the benefit of native compilation for packages from nixpkgs.
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