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From: bugzilla-daemon@bugzilla.kernel.org
To: kvm@vger.kernel.org
Subject: [Bug 203477] [AMD][KVM] Windows L1 guest becomes extremely slow and unusable after enabling Hyper-V
Date: Mon, 12 Oct 2020 08:57:45 +0000	[thread overview]
Message-ID: <bug-203477-28872-W1XyR1jiRu@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-203477-28872@https.bugzilla.kernel.org/>

https://bugzilla.kernel.org/show_bug.cgi?id=203477

vkuznets@redhat.com changed:

           What    |Removed                     |Added
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                 CC|                            |vkuznets@redhat.com

--- Comment #7 from vkuznets@redhat.com ---
(In reply to Yonggang Luo from comment #6)
>-cpu
> host,enforce,hv_ipi,hv_relaxed,hv_reset,hv_runtime,hv_spinlocks=0x1fff,
> hv_stimer,hv_synic,hv_time,hv_vapic,hv_vpindex,+kvm_pv_eoi,+kvm_pv_unhalt,
> +lahf_lm,+sep,+svm,-hypervisor
> ```

Try adding 'hv_stimer_direct' to the list, Hyper-V can't use synthetic timers
otherwise. Also, why do you need '-hypervisor' flag? Could you try without it?

Also, please try with the latest upstream kernel (5.9). 5.3 has a lot of known
nested SVM related bugs.

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  parent reply	other threads:[~2020-10-12  8:57 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-02  4:30 [Bug 203477] New: [AMD][KVM] Windows L1 guest becomes extremely slow and unusable after enabling Hyper-V bugzilla-daemon
2019-07-29 22:07 ` [Bug 203477] " bugzilla-daemon
2019-07-31 16:01 ` bugzilla-daemon
2019-09-19  3:11 ` bugzilla-daemon
2020-07-26 18:11 ` bugzilla-daemon
2020-10-11 18:47 ` bugzilla-daemon
2020-10-11 18:50 ` bugzilla-daemon
2020-10-12  8:57 ` bugzilla-daemon [this message]
2020-10-12 12:34 ` bugzilla-daemon
2022-05-23 19:23 ` bugzilla-daemon
2023-03-07  8:13 ` bugzilla-daemon

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