Currently, the virtio specification does not include provision for the TRIM (aka DISCARD) command that allows a guest operating system to signal the disk hardware that blocks have become unused so that the underlying device may clear the physical data.
The TRIM/DISCARD command was introduced for SSD disks as an extension to the AHCI specification that is used in SATA systems.
With Virtual Machines we can use this command to tell QEMU's Qcow2 driver to reclaim unused space in the disk image. This ensures the disk image file is kept to the smallest size possible where without the TRIM/DISCARD command it grows to it's maximum configured size and never shrinks again when data is deleted.
Let's swap our default disk driver from `virtio-blk-pci` which does not support TRIM to `ahci` which does.
(We cannot use `virtio-scsi-pci` when running macOS, like we do in our default disk device, because macOS does not support SCSI disks at all on x86_64 systems.)
Currently, the virtio specification does not include provision for the TRIM (aka DISCARD) command that allows a guest operating system to signal the disk hardware that blocks have become unused so that the underlying device may clear the physical data.
The TRIM/DISCARD command was introduced for SSD disks as an extension to the AHCI specification that is used in SATA systems.
With Virtual Machines we can use this command to tell QEMU's Qcow2 driver to reclaim unused space in the disk image. This ensures the disk image file is kept to the smallest size possible where without the TRIM/DISCARD command it grows to it's maximum configured size and never shrinks again when data is deleted.
Let's swap our default disk driver from `virtio-blk-pci` which does not support TRIM to `virtio-scsi-pci` which does.
The CDN we were using in QuickGet only carries version 7.0 and 7.1. By switching to a different CDN provided for the OpenBSD Community (listed on https://www.openbsd.org/ftp.html) we can regain access to version 6.8 and 6.9.
Include change from PR 548
- replace shallow with unblobby clone
Catch up with macOS note from merged PR 559
- note on macOS filesystems
Co-authored-by: giladwo <giladwo@users.noreply.github.com>
Co-authored-by: tinsami1 <tinsami1@users.noreply.github.com>
author Phil Clifford <philip.clifford@gmail.com> 1645494694 +0000
committer Phil Clifford <philip.clifford@gmail.com> 1645926095 +0000
rebasing upstream while trying to keep up
QEMU 7.0 introduces a change/regression where it is not possible to use GL accerlation via GTK/SDL displays and also bring up SPICE: https://gitlab.com/qemu-project/qemu/-/issues/1036
This patch prevents Quickemu from bringing up SPICE when GTK or SDK are selected as the display.
