From: Marcelo Tosatti <mtosatti@redhat.com>
To: David Matlack <dmatlack@google.com>
Cc: Gleb Natapov <gleb@kernel.org>,
Paolo Bonzini <pbonzini@redhat.com>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] kvm: don't take vcpu mutex for obviously invalid vcpu ioctls
Date: Mon, 22 Sep 2014 21:13:08 -0300 [thread overview]
Message-ID: <20140923001308.GA13962@amt.cnet> (raw)
In-Reply-To: <20140922225816.GD8347@google.com>
On Mon, Sep 22, 2014 at 03:58:16PM -0700, David Matlack wrote:
> > Should not be executing vcpu ioctls without interrupt KVM_RUN in the
> > first place.
>
> This patch is trying to be nice to code that isn't aware it's
> probing kvm file descriptors. We saw long hangs with some generic
> process inspection code that was probing all open file descriptors.
> There's no reason non-kvm ioctls should have to wait for the vcpu
> mutex to become available just to fail.
OK then, please add the usecase to the changelog.
prev parent reply other threads:[~2014-09-23 0:13 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-19 23:03 [PATCH] kvm: don't take vcpu mutex for obviously invalid vcpu ioctls David Matlack
2014-09-22 10:50 ` Paolo Bonzini
2014-09-22 13:45 ` Christian Borntraeger
2014-09-22 14:31 ` Paolo Bonzini
2014-09-22 18:35 ` David Matlack
2014-09-22 19:20 ` Christian Borntraeger
2014-09-22 19:29 ` Paolo Bonzini
2014-09-23 6:49 ` Gleb Natapov
2014-09-23 8:06 ` Christian Borntraeger
2014-09-23 8:23 ` Paolo Bonzini
2014-09-22 19:40 ` David Matlack
2014-09-22 20:08 ` Marcelo Tosatti
2014-09-22 21:29 ` Paolo Bonzini
2014-09-22 23:00 ` Marcelo Tosatti
2014-09-22 22:58 ` David Matlack
2014-09-23 0:13 ` Marcelo Tosatti [this message]
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