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Escala ZRAM a Tamaño Total de Memoria

En Fedora, no se crea una partición swap de manera predeterminada en el momento de la instalación. En su lugar, se crea un dispositivo zram y el swap se habilita durante el arranque. zram es un tipo de dispositivo RAM que usa compresión.

Para Fedora 34, el tamaño de este dispositivo zram se ha incrementado. Se establece en el mismo tamaño de la RAM u 8 GB, lo que sea más pequeño. Este cambio permite a los ordenadores con cantidades más pequeñas de RAM completar con éxito la instalación usando el instalador Anaconda.

La asignación de memoria para zram se hace dinámicamente, por lo que el tamaño completo del dispositivo de bloque no se asigna cuando se crea. Este recurso de asignación dinámica, combinado con la compresión en el dispositivo zram que es generalmente mayor de 2:1, garantiza que el archivo swap no consuma totalmente la memoria disponible.

Vea man zram-generator para más información sobre como se invoca a zram.

New package: fbrnch

A new fbrnch (Fed Brunch) package provides a utility which helps simplify or semi-automate workflow processes for Fedora Packagers. This package is available to users without them having to add another Copr repository.

The fbrnch utility supports the following and more tasks:

  • Merging and building packages across release branches

  • Source RPM (SRPM) files, scratch builds, local install, and mock builds from arbitrary package branches

  • Cloning and listing Fedora packages from Pagure code hosting system

  • Creating, updating and listing package reviews

  • Requesting new repositories and branches, and importing new packages directly from package reviews

ARMv7 to use UEFI as default for all armhfp generated images

The UEFI for ARMv7 devices feature delivered all the described infrastructure changes in Fedora 30. However, it brought also some problems with upstream kernel, bootloaders and a number of other pieces, which were out of Fedora control.

In this release, the said problematic pieces were fixed. As a result, the user experience is consistent across all Fedora CPU architectures.

Main is a new name for default git repository branches

With Fedora 34 release, data residing on the master branch in all Fedora git repositories have been moved to a branch named main. This update is in line with Fedora’s vision to be free and open source software built by inclusive, welcoming, and open-minded communities.

Users with existing clones of Fedora repositories need to do git pull to get the changed default branches. Users with existing pull requests against the master branch need to do git rebase against the main branch.

Compress kernel firmware to reduce size on disk

Starting with Fedora 34, the kernel firmware has been compressed with the xz -C crc32 option to reduce the ondisk size by almost a half.

Unify the location of GRUB configuration files across all supported CPU architectures

This change simplifies the GRUB configuration file, improves overall user experience, and also provides the following notable benefits:

  • Allow the same installation to be booted with either EFI or legacy BIOS

  • Use the same documentation and commands for all architectures

    • NOTE: If grub.cfg needs updating, use grub2-mkconfig -o /boot/grub2/grub.cfg

  • Make GRUB configuration tools more robust by not relying on symbolic links to be created and not having to handle platform specific cases

  • Align with images generated by CoreOS Assembler (COSA) and OSBuild on how the GRUB configuration files are used

  • Align with other Linux distributions on how the GRUB configuration files are used

systemd-oomd prevents out-of-memory situations

The systemd-oomd service monitors swap and CGroups on your system using the Linux pressure stall information (PSI) and analyzes wasted productivity due to resource shortages. When the system is running out of memory, systemd-oomd terminates processes under the CGroup that exceeds the configured memory limits.

The systemd-oomd service is now enabled by default on new installations and when upgrading existing installations. It automatically replaces the earlyoom service, which previous Fedora releases used to prevent out-of-memory situations.

For information on configuring systemd-oomd, see the oomd.conf man page.