From: Rik van Riel <riel@redhat.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Jiannan Ouyang <ouyang@cs.pitt.edu>,
LKML <linux-kernel@vger.kernel.org>,
Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>,
Avi Kivity <avi.kivity@gmail.com>, Gleb Natapov <gleb@redhat.com>,
Ingo Molnar <mingo@redhat.com>,
Marcelo Tosatti <mtosatti@redhat.com>,
Srikar <srikar@linux.vnet.ibm.com>,
"H. Peter Anvin" <hpa@zytor.com>,
"Nikunj A. Dadhania" <nikunj@linux.vnet.ibm.com>,
KVM <kvm@vger.kernel.org>, Thomas Gleixner <tglx@linutronix.de>,
Chegu Vinod <chegu_vinod@hp.com>,
"Andrew M. Theurer" <habanero@linux.vnet.ibm.com>,
Srivatsa Vaddagiri <srivatsa.vaddagiri@gmail.com>,
Andrew Jones <drjones@redhat.com>, Karen Noel <knoel@redhat.com>
Subject: Re: Preemptable Ticket Spinlock
Date: Mon, 22 Apr 2013 15:56:42 -0400 [thread overview]
Message-ID: <517595FA.800@redhat.com> (raw)
In-Reply-To: <1366660147.6454.6.camel@laptop>
On 04/22/2013 03:49 PM, Peter Zijlstra wrote:
> On Mon, 2013-04-22 at 08:52 -0400, Rik van Riel wrote:
>> If the native spin_lock code has been called already at
>> that time, the native code would still need to be modified
>> to increment the ticket number by 2, so we end up with a
>> compatible value in each spin lock's .tickets field, and
>> prevent a deadlock after we switch over to the paravirt
>> variant.
>
> I thought the stuff already made it upstream, but apparently not; the
> lastest posting I'm aware of is here:
>
> https://lkml.org/lkml/2012/5/2/105
>
> That stuff changes the normal ticket increment as well..
Jiannan,
It looks like the patch above could make a good patch
1 (or 2) in your patch series :)
--
All rights reversed
next prev parent reply other threads:[~2013-04-22 19:56 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CAJocwccu5QQyuKRvgNyPSFz2K_rzCW419W9-XdSUYOL7+KqQKg@mail.gmail.com>
2013-04-21 21:12 ` Preemptable Ticket Spinlock Rik van Riel
2013-04-21 23:07 ` Jiannan Ouyang
2013-04-22 5:59 ` Raghavendra K T
2013-04-22 11:51 ` Peter Zijlstra
2013-04-22 12:52 ` Rik van Riel
2013-04-22 19:49 ` Peter Zijlstra
2013-04-22 19:56 ` Rik van Riel [this message]
2013-04-22 20:05 ` Jiannan Ouyang
2013-04-22 20:08 ` Peter Zijlstra
2013-04-22 20:32 ` Rik van Riel
2013-04-22 20:44 ` Peter Zijlstra
2013-04-22 20:48 ` Peter Zijlstra
2013-04-22 20:50 ` Rik van Riel
2013-04-22 20:50 ` Jiannan Ouyang
2013-04-22 20:54 ` Chegu Vinod
2013-04-22 20:46 ` Jiannan Ouyang
2013-04-22 20:49 ` Rik van Riel
2013-04-22 21:01 ` Peter Zijlstra
2013-04-23 5:03 ` Raghavendra K T
2013-04-22 20:55 ` Peter Zijlstra
2013-04-22 21:31 ` Jiannan Ouyang
2013-04-22 23:08 ` Rik van Riel
2013-04-23 5:57 ` Gleb Natapov
2013-04-23 1:42 ` Raghavendra K T
2013-05-30 11:56 ` Raghavendra K T
2013-05-30 20:14 ` Thomas Gleixner
2013-04-22 21:56 ` Andi Kleen
2013-04-22 23:13 ` Rik van Riel
2013-04-22 5:58 ` Raghavendra K T
2013-04-22 16:42 ` Jiannan Ouyang
2013-04-23 1:54 ` Raghavendra K T
2013-04-26 20:10 ` Andrew Theurer
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=517595FA.800@redhat.com \
--to=riel@redhat.com \
--cc=avi.kivity@gmail.com \
--cc=chegu_vinod@hp.com \
--cc=drjones@redhat.com \
--cc=gleb@redhat.com \
--cc=habanero@linux.vnet.ibm.com \
--cc=hpa@zytor.com \
--cc=knoel@redhat.com \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=mtosatti@redhat.com \
--cc=nikunj@linux.vnet.ibm.com \
--cc=ouyang@cs.pitt.edu \
--cc=peterz@infradead.org \
--cc=raghavendra.kt@linux.vnet.ibm.com \
--cc=srikar@linux.vnet.ibm.com \
--cc=srivatsa.vaddagiri@gmail.com \
--cc=tglx@linutronix.de \
/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
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.