Hello Debian Kernel Team, I'm the Community Manager for the Xen Project. I'm writing on behalf of the Xen Project community regarding a Linux kernel patch that improves virtual-machine performance on AMD EPYC systems running Xen or KVM (with Xen emulation).
The patch addresses a communication-performance issue between VMs on the same host. A workaround already exists downstream, but inclusion in Debian 11’s 5.10 kernel would ensure stable performance without manual adjustments. Greg KH declined to backport the series to 5.10 stable as it’s a performance improvement rather than a bug fix, but it has proven reliable in testing. Patch reference: - Mainline patch by Juergen Gross (SUSE) <https://lore.kernel.org/all/[email protected]/> or its backport: - Backport by Teddy Astie (Vates) <https://lore.kernel.org/all/4cc9c1f583fb4bfca02ff7050b9b01cb9abb7e7f.1756803599.git.teddy.as...@vates.tech/> Would you consider integrating this patch into Debian 11’s kernel? Please let us know if you prefer that we open a bug for tracking. Very best regards, Cody Zuschlag Xen Project - Community Manager
