From: Peter Zijlstra <peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
To: Daniel Bristot de Oliveira
<bristot-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: Andy Lutomirski <luto-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Thomas Gleixner <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>,
Mathieu Desnoyers
<mathieu.desnoyers-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>,
Avi Kivity <avi-VrcmuVmyx1hWk0Htik3J/w@public.gmane.org>,
Linus Torvalds
<torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
linux-kernel
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
linux-api <linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"Paul E. McKenney"
<paulmck-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>,
Boqun Feng <boqun.feng-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Andrew Hunter <ahh-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
maged michael
<maged.michael-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Benjamin Herrenschmidt
<benh-XVmvHMARGAS8U2dJNN8I7kB+6BGkLq7r@public.gmane.org>,
Paul Mackerras <paulus-eUNUBHrolfbYtjvyW6yDsg@public.gmane.org>,
Michael Ellerman <mpe-Gsx/Oe8HsFggBc27wqDAHg@public.gmane.org>,
Dave Watson <davejwatson-b10kYP2dOMg@public.gmane.org>,
Ingo Molnar <mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
"H. Peter Anvin" <hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>,
Andrea Parri
<parri.andrea-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
"Russell King, ARM Linux" <linux@armlinux.o>
Subject: Re: [RFC PATCH 0/2] x86: Fix missing core serialization on migration
Date: Tue, 14 Nov 2017 18:40:49 +0100 [thread overview]
Message-ID: <20171114174049.GF3165@worktop.lehotels.local> (raw)
In-Reply-To: <6f9f57fa-8057-cdbe-231b-20920b3b3670-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
On Tue, Nov 14, 2017 at 06:17:13PM +0100, Daniel Bristot de Oliveira wrote:
> IIRC, if the dest cpu is idle and the system is with idle=poll, no IPI
> is fired as well, but that is not a very common case.
You're thinking about wake from idle? That is almost always without IPI,
even without idle=poll.
WARNING: multiple messages have this Message-ID (diff)
From: Peter Zijlstra <peterz@infradead.org>
To: Daniel Bristot de Oliveira <bristot@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Avi Kivity <avi@scylladb.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
linux-api <linux-api@vger.kernel.org>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
Boqun Feng <boqun.feng@gmail.com>, Andrew Hunter <ahh@google.com>,
maged michael <maged.michael@gmail.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
Dave Watson <davejwatson@fb.com>, Ingo Molnar <mingo@redhat.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Andrea Parri <parri.andrea@gmail.com>,
"Russell King, ARM Linux" <linux@armlinux.org.uk>,
Greg Hackmann <ghackmann@google.com>,
Will Deacon <will.deacon@arm.com>, David Sehr <sehr@google.com>,
x86 <x86@kernel.org>
Subject: Re: [RFC PATCH 0/2] x86: Fix missing core serialization on migration
Date: Tue, 14 Nov 2017 18:40:49 +0100 [thread overview]
Message-ID: <20171114174049.GF3165@worktop.lehotels.local> (raw)
In-Reply-To: <6f9f57fa-8057-cdbe-231b-20920b3b3670@redhat.com>
On Tue, Nov 14, 2017 at 06:17:13PM +0100, Daniel Bristot de Oliveira wrote:
> IIRC, if the dest cpu is idle and the system is with idle=poll, no IPI
> is fired as well, but that is not a very common case.
You're thinking about wake from idle? That is almost always without IPI,
even without idle=poll.
next prev parent reply other threads:[~2017-11-14 17:40 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-10 21:12 [RFC PATCH 0/2] x86: Fix missing core serialization on migration Mathieu Desnoyers
2017-11-10 21:12 ` Mathieu Desnoyers
[not found] ` <20171110211249.10742-1-mathieu.desnoyers-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>
2017-11-10 21:12 ` [RFC PATCH 1/2] x86: Introduce sync_core_before_usermode Mathieu Desnoyers
2017-11-10 21:12 ` Mathieu Desnoyers
2017-11-10 21:12 ` [RFC PATCH 2/2] Fix: x86: Add missing core serializing instruction on migration Mathieu Desnoyers
2017-11-10 21:12 ` Mathieu Desnoyers
2017-11-10 21:36 ` [RFC PATCH 0/2] x86: Fix missing core serialization " Linus Torvalds
2017-11-10 21:36 ` Linus Torvalds
[not found] ` <CA+55aFzbroWqi+FTdYhRVSwUZ-M0wDVxjXqDbh40JEnXc2LdgQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-11-10 21:57 ` Mathieu Desnoyers
2017-11-10 21:57 ` Mathieu Desnoyers
[not found] ` <885227610.13045.1510351034488.JavaMail.zimbra-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>
2017-11-10 22:12 ` Linus Torvalds
2017-11-10 22:12 ` Linus Torvalds
2017-11-13 16:56 ` Mathieu Desnoyers
2017-11-13 16:56 ` Mathieu Desnoyers
[not found] ` <617343212.13932.1510592207202.JavaMail.zimbra-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>
2017-11-13 17:14 ` Linus Torvalds
2017-11-13 17:14 ` Linus Torvalds
2017-11-14 14:53 ` Avi Kivity
2017-11-14 14:53 ` Avi Kivity
[not found] ` <4d47fbb8-8f99-19d3-a9cf-66841aeffac3-VrcmuVmyx1hWk0Htik3J/w@public.gmane.org>
2017-11-14 15:17 ` Mathieu Desnoyers
2017-11-14 15:17 ` Mathieu Desnoyers
[not found] ` <4431530.14831.1510672632887.JavaMail.zimbra-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>
2017-11-14 15:42 ` Avi Kivity
2017-11-14 15:42 ` Avi Kivity
2017-11-14 16:05 ` Peter Zijlstra
2017-11-14 16:05 ` Peter Zijlstra
[not found] ` <20171114160541.GC3165-IIpfhp3q70x9+YH6RuovlLjjLBE8jN/0@public.gmane.org>
2017-11-14 16:08 ` Peter Zijlstra
2017-11-14 16:08 ` Peter Zijlstra
2017-11-14 16:49 ` Mathieu Desnoyers
2017-11-14 16:49 ` Mathieu Desnoyers
2017-11-14 17:03 ` Avi Kivity
2017-11-14 17:03 ` Avi Kivity
[not found] ` <98b50de6-4cb1-9c43-4353-9ee7135dc63f-VrcmuVmyx1hWk0Htik3J/w@public.gmane.org>
2017-11-14 17:10 ` Mathieu Desnoyers
2017-11-14 17:10 ` Mathieu Desnoyers
[not found] ` <1216732828.15017.1510679404571.JavaMail.zimbra-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>
2017-11-14 17:31 ` Linus Torvalds
2017-11-14 17:31 ` Linus Torvalds
2017-11-14 16:10 ` Andy Lutomirski
2017-11-14 16:10 ` Andy Lutomirski
[not found] ` <CALCETrVpBocmrd+R5-R-d+QBvp6h8iZkjo7Xjy6V6x1rPfh25w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-11-14 16:13 ` Thomas Gleixner
2017-11-14 16:13 ` Thomas Gleixner
2017-11-14 16:16 ` Andy Lutomirski
2017-11-14 16:16 ` Andy Lutomirski
[not found] ` <CALCETrXpR7ai047pHtdQe5J+FpuFO5ekeeEqLUt1wVLopyNt_Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-11-14 16:31 ` Peter Zijlstra
2017-11-14 16:31 ` Peter Zijlstra
[not found] ` <20171114163159.GD3165-IIpfhp3q70x9+YH6RuovlLjjLBE8jN/0@public.gmane.org>
2017-11-14 17:17 ` Daniel Bristot de Oliveira
2017-11-14 17:17 ` Daniel Bristot de Oliveira
[not found] ` <6f9f57fa-8057-cdbe-231b-20920b3b3670-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2017-11-14 17:40 ` Peter Zijlstra [this message]
2017-11-14 17:40 ` Peter Zijlstra
[not found] ` <20171114174049.GF3165-IIpfhp3q70x9+YH6RuovlLjjLBE8jN/0@public.gmane.org>
2017-11-14 18:01 ` Daniel Bristot de Oliveira
2017-11-14 18:01 ` Daniel Bristot de Oliveira
[not found] ` <ada6faaf-9e94-439f-57f2-3b9179cb4bea-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2017-11-14 18:17 ` Peter Zijlstra
2017-11-14 18:17 ` Peter Zijlstra
[not found] ` <20171114181732.bwahj6woik27trou-Nxj+rRp3nVydTX5a5knrm8zTDFooKrT+cvkQGrU6aU0@public.gmane.org>
2017-11-14 18:24 ` Daniel Bristot de Oliveira
2017-11-14 18:24 ` Daniel Bristot de Oliveira
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=20171114174049.GF3165@worktop.lehotels.local \
--to=peterz-wegcikhe2lqwvfeawa7xhq@public.gmane.org \
--cc=ahh-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org \
--cc=avi-VrcmuVmyx1hWk0Htik3J/w@public.gmane.org \
--cc=benh-XVmvHMARGAS8U2dJNN8I7kB+6BGkLq7r@public.gmane.org \
--cc=boqun.feng-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org \
--cc=bristot-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org \
--cc=davejwatson-b10kYP2dOMg@public.gmane.org \
--cc=hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org \
--cc=linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux@armlinux.o \
--cc=luto-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org \
--cc=maged.michael-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org \
--cc=mathieu.desnoyers-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org \
--cc=mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org \
--cc=mpe-Gsx/Oe8HsFggBc27wqDAHg@public.gmane.org \
--cc=parri.andrea-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org \
--cc=paulmck-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org \
--cc=paulus-eUNUBHrolfbYtjvyW6yDsg@public.gmane.org \
--cc=tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org \
--cc=torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org \
/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.