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Re: [regression 5.10.y] Libvirt can no longer delete macvtap devices after backport of a6cec0bcd342 ("net: rtnetlink: add bulk delete support flag") to 5.10.y series (Debian 11)

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On 12/18/25 20:50, Salvatore Bonaccorso wrote:
> 
> Is there soemthing missing?
> 
> Roland I think it would be helpful if you can test as well more recent
> stable series versions to confirm if the issue is present there as
> well or not, which might indicate a 5.10.y specific backporting
> problem.

FWIW, it (as usual) would be very important to know if this happens with
mainline as well, as that determines if it's a general problem or a
backporting problem -- and the outcome, strictly speaking, determines if
the developers of the change in question or the stable team are
responsible. If we are lucky that distinction does not matter, but if we
are unlucky neither camp might look into this as of now. I wrote more
about this at length here:
https://linux-regtracking.leemhuis.info/post/frequent-reasons-why-linux-kernel-bug-reports-are-ignored/

But yes, given that 5.10.y is quite old, it might be easier to test more
recent stable series first. But if they show the same problem, please
test mainline -- and ideally try if reverting is able to resolve the
problem.

Ciao, Thorsten

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Libvirt can no longer delete macvtap devices after kernel update  (Debian 11) Roland Schwarzkopf <rschwarzkopf@mathematik.uni-marburg.de> - 2025-12-17 14:10 +0100
  Re: Libvirt can no longer delete macvtap devices after kernel update  (Debian 11) Salvatore Bonaccorso <carnil@debian.org> - 2025-12-17 20:30 +0100
    Re: Libvirt can no longer delete macvtap devices after kernel update  (Debian 11) Roland Schwarzkopf <rschwarzkopf@mathematik.uni-marburg.de> - 2025-12-18 15:10 +0100
      Re: [regression 5.10.y] Libvirt can no longer delete macvtap devices  after backport of a6cec0bcd342 ("net: rtnetlink: add bulk delete support  flag") to 5.10.y series (Debian 11) Thorsten Leemhuis <regressions@leemhuis.info> - 2025-12-19 11:10 +0100
        Re: [regression 5.10.y] Libvirt can no longer delete macvtap  devices after backport of a6cec0bcd342 ("net: rtnetlink: add bulk delete  support flag") to 5.10.y series (Debian 11) Ben Hutchings <benh@debian.org> - 2026-01-02 21:20 +0100
          Re: [regression 5.10.y] Libvirt can no longer delete macvtap devices  after backport of a6cec0bcd342 ("net: rtnetlink: add bulk delete support  flag") to 5.10.y series (Debian 11) Thorsten Leemhuis <regressions@leemhuis.info> - 2026-01-05 13:50 +0100
      Re: [regression 5.10.y] Libvirt can no longer delete macvtap devices  after backport of a6cec0bcd342 ("net: rtnetlink: add bulk delete support  flag") to 5.10.y series (Debian 11) Roland Schwarzkopf <rschwarzkopf@mathematik.uni-marburg.de> - 2025-12-19 18:20 +0100

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