-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 M. Vefa Bicakci: > Hello all, > > I noticed that the following commit causes a regression in QubesOS when > a VM's network interface is detached and re-attached a few times in a row: > > 5b5971df3bc2775107ddad164018a8a8db633b81 > ("xen-netfront: remove warning when unloading module") > > The regression exhibits itself via VM unresponsiveness to qrexec commands > and heavier than usual CPU utilization involving the xenbus and xenwatch > kernel threads in the VM whose network interface had been > detached/re-attached. > > This commit has been back-ported to the kernel trees for versions 4.9.80 and > 4.14.17, which is why QubesOS's testing kernel (based on 4.14.18) is also > affected.
Thanks, for tracking this down! And sorry that I missed your report until now (Otherwise I would already have included it in the latest kernel PR). > I am currently using QubesOS R3.2, but I believe this issue affects R4.0 as > well. I'm observing this behavior on R4.0. Will try if reverting fixes the problem for me. > Reverting this commit appears to resolve the regression for the time being. I > haven't had the time to formulate a proper correction. Did you find out yet why this change is broken? -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEE3E8ezGzG3N1CTQ//kO9xfO/xly8FAlqZnTsACgkQkO9xfO/x ly+XJBAAq3D4TT3+k6v7U5zWe6VqyxuSZOYHMrdUmNUTRp9Q+6+48jK7/gn1QkLX VY8i/eIqgqn+OAIWi2oFmT9gtWtP+++cml90OY+BLeQg6C0ZnszHgHzISDFYWeAQ 7aHDBBmP+b3B4Jf2aWFHLeZjbyURJIF9z00xGfb7NAcHjFHlSJXAt19GMevjcy0H G/rxpsW2ebgrnN3YVIJhqgCJrnpr3uoSWL3PozumnnFaxUDuxv/3MaVy5bJJTdz8 3ndcAN7rn35j8hB+Ionc47IBbzfRsfLSBYPUA01iaQIEnkK+55tEQlLDW8LCyrnc dlMliCoWAqjkr1gruNI+oMnDq/Zm1d7qBzI7+ZvDPui3GFV4C+/A3Bca4bak5tVb u/P6pfCMpE/StFN9/CttImfjqEG72rIOq4lHKYOZ7pdC4N3nUYVlLOYDvmVOoEwy SuLhVoMAn+QWk48FSSioA72N7hh/Y70GjDb+I1JhfHnkas9AJ62b0dw46TNgo2jR FOyCokgRTaxidGuIoKMTo6v0MljVnlC907H2Dn/et0lpuiUch71jv/S7SjCnzEGr tExeMOjFGo5vgE6nyaoQQuT/PZXJMUHHOLtYwljM/MslqaW1R04WbDxKX389x8uF 5QAm4t334lk6JgIQTEz+Zk92Wvchd78WqWGwUE6RcWIOxb+rtVo= =az44 -----END PGP SIGNATURE----- -- You received this message because you are subscribed to the Google Groups "qubes-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-devel+unsubscr...@googlegroups.com. To post to this group, send email to email@example.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-devel/efaec423-a5da-68f7-7a16-8aed217193be%40invisiblethingslab.com. For more options, visit https://groups.google.com/d/optout.