Am 31.08.22 um 15:28 schrieb Fiona Ebner: > which might be responsible for several issues reported in the > community forum[0][1]. > > In my case, loading a VM snapshot that originally was taken on > a CPU from a different vendor often caused problems in other VMs(!). > In particular, it often led to RCU stalls (with similar messages as in > [1]) or slowdowns, and sometimes clock jumps far into the future (like > in [0]). With this revert applied, everything seems to run smoothly > even after loading the "bad" snapshot 10 times. > > [0] https://forum.proxmox.com/threads/112756/ > [1] https://forum.proxmox.com/threads/111494/ > > Signed-off-by: Fiona Ebner <f.eb...@proxmox.com> > --- > > Needed to build with an ABI bump, AFAICT because of the removed > KVM_X86_OP(write_tsc_multiplier), but it's even an ABI break I guess? > If this is not ok, we can either > A) try to revert while keeping the ABI intact > B) try to backport d1021a1bc47668aa715b7f2121086c9598bffcbf instead
Sorry, that's the hash in git://git.launchpad.net/~ubuntu-kernel-test/ubuntu/+source/linux/+git/mainline-crack Upstream it's 11d39e8cc43e1c6737af19ca9372e590061b5ad2 > > That's the one reason it's RFC. The other is that I haven't had much > time to look at the actual code yet. > > ...dd-vendor-callbacks-for-writing-the-.patch | 247 ++++++++++++++++++ > 1 file changed, 247 insertions(+) > create mode 100644 > patches/kernel/0032-Revert-KVM-X86-Add-vendor-callbacks-for-writing-the-.patch > > diff --git > a/patches/kernel/0032-Revert-KVM-X86-Add-vendor-callbacks-for-writing-the-.patch > > b/patches/kernel/0032-Revert-KVM-X86-Add-vendor-callbacks-for-writing-the-.patch > new file mode 100644 > index 0000000..d2f7796 > --- /dev/null > +++ > b/patches/kernel/0032-Revert-KVM-X86-Add-vendor-callbacks-for-writing-the-.patch > @@ -0,0 +1,247 @@ > +From 0747f18be1da2033a20c2a355678b9c278ce4603 Mon Sep 17 00:00:00 2001 > +From: Fiona Ebner <f.eb...@proxmox.com> > +Date: Wed, 31 Aug 2022 13:49:55 +0200 > +Subject: [PATCH] Revert "KVM: X86: Add vendor callbacks for writing the TSC > + multiplier" > + > +This reverts commit 1ab9287add5e265352d18517551abf6d01d004fd until commit > +d1021a1bc47668aa715b7f2121086c9598bffcbf which fixes it can be cleanly Same here > +applied. > + > +Signed-off-by: Fiona Ebner <f.eb...@proxmox.com> _______________________________________________ pve-devel mailing list pve-devel@lists.proxmox.com https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-devel
