On Wed, Jun 12, 2024 at 8:41 AM Daniel P. Berrangé <berrange@xxxxxxxxxx> wrote: > > The context is that QEMU has recently merged changes upstream that force > use of the x86-64-v2 baseline for QEMU, in order get more efficient code > in the TCG emulator. The changes were made in QEMU's global CFLAGS so this > will affect all usage of QEMU, whether KVM, or TCG, for both VMs and user > space emulation (the latter used by podman for non-native containers) > > IOW, if [when] we rebase Fedora to the next QEMU upstream release, users > with older x86_64 hardware would likely be unable to run QEMU, from F41 > onwards, unless some TBD action is taken. Could the answer be "we patch the build to not use the changed FLAGS"? (Perhaps also creating a qemu-zoomzoom package that's the same as the regular qemu but with the upstream CFLAGS that people who can take advantage can install instead) Neither "Functional" nor "eFficient" are in the Fedora Foundations, but in general, I think we should prefer the former over the latter. It's better for the project overall to be a little less efficient than it could be than to surprise people with "a key package no longer works on your hardware". It would be better to explicitly move the entire distro to a higher baseline than to have some packages work and some not. (I'm not saying now is the time to make that decision, but it's clear that we should at least have an idea of the conditions where the switch becomes the right choice) -- Ben Cotton (he/him) TZ=America/Indiana/Indianapolis https://fedoraproject.org/wiki/User:Bcotton -- _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
