From: "Luis R. Rodriguez" <mcgrof@suse.com>
To: Andy Lutomirski <luto@amacapital.net>
Cc: "Luis R. Rodriguez" <mcgrof@do-not-panic.com>,
David Vrabel <david.vrabel@citrix.com>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
"xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
X86 ML <x86@kernel.org>, kvm list <kvm@vger.kernel.org>,
Paul McKenney <paulmck@linux.vnet.ibm.com>,
Steven Rostedt <rostedt@goodmis.org>,
Borislav Petkov <bp@suse.de>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
Jan Beulich <JBeulich@suse.com>
Subject: Re: [RFC v4 1/2] x86/xen: add xen_is_preemptible_hypercall()
Date: Tue, 27 Jan 2015 02:45:54 +0100 [thread overview]
Message-ID: <20150127014554.GC17887@wotan.suse.de> (raw)
In-Reply-To: <CALCETrWXrVAFQix=R33+ixGA34AKO=kR+zUzyWyJY6DWf9gBEA@mail.gmail.com>
On Thu, Jan 22, 2015 at 05:40:45PM -0800, Andy Lutomirski wrote:
> On Thu, Jan 22, 2015 at 4:29 PM, Luis R. Rodriguez
> <mcgrof@do-not-panic.com> wrote:
> > From: "Luis R. Rodriguez" <mcgrof@suse.com>
> >
> > On kernels with voluntary or no preemption we can run
> > into situations where a hypercall issued through userspace
> > will linger around as it addresses sub-operatiosn in kernel
> > context (multicalls). Such operations can trigger soft lockup
> > detection.
>
> Looks reasonable.
I'll add a reviewed-by...
LUis
next prev parent reply other threads:[~2015-01-27 1:45 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-23 0:29 [RFC v4 0/2] x86/xen: add xen hypercall preemption Luis R. Rodriguez
2015-01-23 0:29 ` [RFC v4 1/2] x86/xen: add xen_is_preemptible_hypercall() Luis R. Rodriguez
2015-01-23 1:40 ` Andy Lutomirski
2015-01-27 1:45 ` Luis R. Rodriguez [this message]
2015-01-23 11:30 ` [Xen-devel] " David Vrabel
2015-01-23 18:57 ` Luis R. Rodriguez
2015-01-23 0:29 ` [RFC v4 2/2] x86/xen: allow privcmd hypercalls to be preempted Luis R. Rodriguez
2015-01-23 1:40 ` Andy Lutomirski
2015-01-23 1:57 ` Steven Rostedt
2015-01-23 11:45 ` [Xen-devel] " David Vrabel
2015-01-23 18:58 ` Luis R. Rodriguez
2015-01-26 10:46 ` Jan Beulich
2015-01-26 10:47 ` David Vrabel
2015-01-23 19:16 ` Luis R. Rodriguez
2015-01-23 11:51 ` [Xen-devel] [RFC v4 0/2] x86/xen: add xen hypercall preemption David Vrabel
2015-01-23 18:58 ` Luis R. Rodriguez
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