From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Zhang Haoyu" <zhanghy@sangfor.com>
Subject: Re: [question] lots of interrupts injected to vm when pressing some key w/o releasing
Date: Mon, 24 Nov 2014 20:17:46 +0800
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Cc: "Paolo Bonzini" <pbonzini@redhat.com>,
	"Alex Williamson" <alex.williamson@redhat.com>,
	"Zhang, Yang Z" <yang.z.zhang@intel.com>,
	"Michael S.Tsirkin" <mst@redhat.com>,
	"Gleb Natapov" <gleb@cloudius-systems.com>
To: "Zhang Haoyu" <zhanghy@sangfor.com>, "kvm" <kvm@vger.kernel.org>
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>Hi all,
>
>If I press the one of "Insert/Delete/Home/End/PageUp/PageDown/UpArrow/
>DownArrow/LeftArrow/RightArrow" key w/o releasing, then lots of interrupts
>will be injected to vm(win7/win2008), about 8000/s, the system become very slow,
>bringing very bad experience. But the other keys are okay.

Sorry for wrong description, the interrupt rate is normal, 
but huge numbers of vmexit induced by PIO were produced.

Thanks,
Zhang Haoyu
>And, linux guest has no this problem.
>
>If I remove the commit of 0bc830b05c667218d703f2026ec866c49df974fc, then the
>problem disappeared, but win7 guest got stuck at booting stage.
>And so strange that If the vm has only one vcpu, then the problem also disappeared.
>
>Any ideas?
>
>Thanks,
>Zhang Haoyu