LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Andy Lutomirski <luto@amacapital.net>
To: "Luis R. Rodriguez" <mcgrof@do-not-panic.com>
Cc: 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>,
	"Luis R. Rodriguez" <mcgrof@suse.com>,
	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: Thu, 22 Jan 2015 17:40:45 -0800	[thread overview]
Message-ID: <CALCETrWXrVAFQix=R33+ixGA34AKO=kR+zUzyWyJY6DWf9gBEA@mail.gmail.com> (raw)
In-Reply-To: <1421972951-3940-2-git-send-email-mcgrof@do-not-panic.com>

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.

--Andy

  reply	other threads:[~2015-01-23  1:41 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 [this message]
2015-01-27  1:45     ` Luis R. Rodriguez
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

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='CALCETrWXrVAFQix=R33+ixGA34AKO=kR+zUzyWyJY6DWf9gBEA@mail.gmail.com' \
    --to=luto@amacapital.net \
    --cc=JBeulich@suse.com \
    --cc=boris.ostrovsky@oracle.com \
    --cc=bp@suse.de \
    --cc=david.vrabel@citrix.com \
    --cc=hpa@zytor.com \
    --cc=konrad.wilk@oracle.com \
    --cc=kvm@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=masami.hiramatsu.pt@hitachi.com \
    --cc=mcgrof@do-not-panic.com \
    --cc=mcgrof@suse.com \
    --cc=mingo@redhat.com \
    --cc=paulmck@linux.vnet.ibm.com \
    --cc=rostedt@goodmis.org \
    --cc=tglx@linutronix.de \
    --cc=x86@kernel.org \
    --cc=xen-devel@lists.xenproject.org \
    --subject='Re: [RFC v4 1/2] x86/xen: add xen_is_preemptible_hypercall()' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).