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Hi Fiona,
Does this patch correspond to kernels linked in this forum thread?
https://forum.proxmox.com/threads/proxmox-7-2-3-ceph-16-2-7-migrating-vms-hangs-them-kernel-panic-on-linux-freeze-on-windows.109645/page-2#post-488479
If so I can test them and see if that helps with bugzilla entry #4073:
https://bugzilla.proxmox.com/show_bug.cgi?id=4073
Thanks
El 1/9/22 a las 8:25, Fiona Ebner escribió:
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>
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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>
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