linux-kernel - Re: RFC: silencing kvm unimplemented msr spew.

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Message-ID: <1171934212.9737926.1469204427109.JavaMail.zimbra@redhat.com>
Date:	Fri, 22 Jul 2016 12:20:27 -0400 (EDT)
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Bandan Das <bsd@...hat.com>
Cc:	Dave Jones <dsj@...com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Radim Krčmář <rkrcmar@...hat.com>,
	kvm@...r.kernel.org
Subject: Re: RFC: silencing kvm unimplemented msr spew.


> >> Paolo, would you prefer this, or the other approach you already ack'd ?
> >
> > I think I prefer the other, because vcpu_debug is not ratelimited.
> > If the guest can trigger a printk it should always be ratelimited.
> 
> Agree with rate limiting, but making this the default for everything doesn't
> sound right IMO, especially for ignore_msrs=1. vcpu_unimpl is already rate
> limited.

The problem is that your patch removes rate limiting whenever it now
uses vcpu_debug.

Paolo