linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Josh Poimboeuf <jpoimboe@redhat.com>
To: Miroslav Benes <mbenes@suse.cz>
Cc: Jiri Kosina <jikos@kernel.org>, Jessica Yu <jeyu@redhat.com>,
	linux-kernel@vger.kernel.org, live-patching@vger.kernel.org,
	Vojtech Pavlik <vojtech@suse.com>
Subject: Re: [RFC PATCH v1.9 00/14] livepatch: hybrid consistency model
Date: Tue, 5 Apr 2016 09:34:56 -0500	[thread overview]
Message-ID: <20160405143456.jyr4iol4jw233xll@treble.redhat.com> (raw)
In-Reply-To: <alpine.LNX.2.00.1604051617350.1180@pobox.suse.cz>

On Tue, Apr 05, 2016 at 04:24:33PM +0200, Miroslav Benes wrote:
> On Mon, 4 Apr 2016, Josh Poimboeuf wrote:
> 
> > > I'd add a fake signal facility for sleeping non-migrated tasks. This 
> > > would accelerate a migration to a new universe. We have it in kgraft for 
> > > quite some time and it worked out great. See 
> > > lkml.kernel.org/r/1430739625-4658-9-git-send-email-jslaby@suse.cz which 
> > > went with Jiri's kgraft-on-klp patch set. See also Oleg's reply as it is 
> > > important (I changed kgraft implementation according to that).
> > 
> > Ok, I'll look into sending a fake signal to remaining tasks.
> 
> Oh, do not worry about this one. I can prepare a patch once we discuss and 
> review the rest. I think you have a lot on your plate even now.
> 
> There are several options how to do it. I think it would be nice not send 
> a fake signal immediately. So we can...
> 
> 1. do it after some time of waiting, or
> 
> 2. we can have a knob in sysfs for an admin to send a fake signal if he 
> does not want to wait anymore, or
> 
> 3. (and this is crazy one) we can trace the progress of a migration and 
> when there is none for several iterations we can send a signal

Ok, thanks, I'll skip it for now.  We do need to think about the options
and I do have a full plate already.

I might also procrastinate with the patch module removal patch, since
that's another separate piece which might need more discussion.

-- 
Josh

  reply	other threads:[~2016-04-05 14:35 UTC|newest]

Thread overview: 89+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-03-25 19:34 [RFC PATCH v1.9 00/14] livepatch: hybrid consistency model Josh Poimboeuf
2016-03-25 19:34 ` [RFC PATCH v1.9 01/14] x86/asm/head: cleanup initial stack variable Josh Poimboeuf
2016-03-25 19:34 ` [RFC PATCH v1.9 02/14] x86/asm/head: use a common function for starting CPUs Josh Poimboeuf
2016-03-25 19:34 ` [RFC PATCH v1.9 03/14] x86/asm/head: standardize the bottom of the stack for idle tasks Josh Poimboeuf
2016-03-25 19:34 ` [RFC PATCH v1.9 04/14] x86: move _stext marker before head code Josh Poimboeuf
2016-03-25 19:34 ` [RFC PATCH v1.9 05/14] sched: horrible way to detect whether a task has been preempted Josh Poimboeuf
2016-04-06 13:06   ` Petr Mladek
2016-04-06 16:33     ` Josh Poimboeuf
2016-04-07  9:47       ` Petr Mladek
2016-04-07 14:34         ` Josh Poimboeuf
2016-04-08  8:07           ` Petr Mladek
2016-04-08 14:34             ` Josh Poimboeuf
2016-04-07 21:15   ` Jessica Yu
2016-04-07 21:37     ` Jiri Kosina
2016-04-07 22:35       ` Josh Poimboeuf
2016-04-07 22:53         ` Jiri Kosina
2016-04-07 23:15       ` Jessica Yu
2016-04-08  7:05         ` Jiri Kosina
2016-04-08  8:03           ` Petr Mladek
2016-04-08 14:31             ` Josh Poimboeuf
2016-04-11  8:38               ` Petr Mladek
2016-03-25 19:34 ` [RFC PATCH v1.9 06/14] x86: add error handling to dump_trace() Josh Poimboeuf
2016-03-25 19:34 ` [RFC PATCH v1.9 07/14] x86/stacktrace: add function for detecting reliable stack traces Josh Poimboeuf
2016-03-31 13:03   ` Miroslav Benes
2016-04-04 17:54     ` Josh Poimboeuf
2016-04-11 14:16       ` Jiri Slaby
2016-04-12 15:56         ` Josh Poimboeuf
2016-06-09  8:31           ` Jiri Slaby
2016-06-13 21:58             ` Josh Poimboeuf
2016-12-01 20:28               ` Jiri Slaby
2016-12-01 20:59                 ` Josh Poimboeuf
2017-01-17 13:08                   ` Jiri Slaby
2016-04-04 15:55   ` Petr Mladek
2016-04-04 17:58     ` Josh Poimboeuf
2016-04-07 11:55   ` Petr Mladek
2016-04-07 14:46     ` Josh Poimboeuf
2016-04-08  8:24       ` Petr Mladek
2016-04-11  3:29   ` Jessica Yu
2016-03-25 19:34 ` [RFC PATCH v1.9 08/14] livepatch: separate enabled and patched states Josh Poimboeuf
2016-04-11  3:31   ` Jessica Yu
2016-04-12 14:44   ` [RFC PATCH v1.9 08/14] " Chris J Arges
2016-04-12 17:16     ` Josh Poimboeuf
2016-04-12 17:35       ` Chris J Arges
2016-04-12 18:25         ` Josh Poimboeuf
2016-03-25 19:34 ` [RFC PATCH v1.9 09/14] livepatch: remove unnecessary object loaded check Josh Poimboeuf
2016-03-25 19:34 ` [RFC PATCH v1.9 10/14] livepatch: move patching functions into patch.c Josh Poimboeuf
2016-03-25 19:34 ` [RFC PATCH v1.9 11/14] livepatch: store function sizes Josh Poimboeuf
2016-03-25 19:34 ` [RFC PATCH v1.9 12/14] livepatch: create per-task consistency model Josh Poimboeuf
2016-03-31 13:12   ` Miroslav Benes
2016-04-04 18:21     ` Josh Poimboeuf
2016-04-04 18:27       ` Vojtech Pavlik
2016-04-04 18:33         ` Josh Poimboeuf
2016-04-05 11:36           ` Vojtech Pavlik
2016-04-05 13:53             ` Josh Poimboeuf
2016-04-05 17:32   ` Minfei Huang
2016-04-05 21:17     ` Josh Poimboeuf
2016-04-14  9:25   ` Miroslav Benes
2016-04-14 16:39     ` Josh Poimboeuf
2016-04-15  9:17       ` Miroslav Benes
2016-03-25 19:35 ` [RFC PATCH v1.9 13/14] livepatch: add /proc/<pid>/patch_status Josh Poimboeuf
2016-03-31  9:33   ` Jiri Slaby
2016-03-31  9:40     ` Jiri Slaby
2016-04-04 16:56     ` Josh Poimboeuf
2016-03-25 19:35 ` [RFC PATCH v1.9 14/14] livepatch: update task universe when exiting kernel Josh Poimboeuf
2016-04-14  8:47   ` Miroslav Benes
2016-04-14  8:50     ` Miroslav Benes
2016-04-14 13:39       ` Josh Poimboeuf
2016-04-18 15:01         ` [RFC PATCH 0/2] s390/klp: s390 support Miroslav Benes
2016-04-18 15:01           ` [RFC PATCH 1/2] s390: livepatch, reorganize TIF bits Miroslav Benes
2016-04-18 15:01           ` [RFC PATCH 2/2] s390/klp: update task universe when exiting kernel Miroslav Benes
2016-04-18 15:17           ` [RFC PATCH 0/2] s390/klp: s390 support Josh Poimboeuf
2016-04-14 13:23     ` [RFC PATCH v1.9 14/14] livepatch: update task universe when exiting kernel Josh Poimboeuf
2016-03-31 12:54 ` [RFC PATCH v1.9 00/14] livepatch: hybrid consistency model Miroslav Benes
2016-04-04 17:03   ` Josh Poimboeuf
2016-04-05 14:24     ` Miroslav Benes
2016-04-05 14:34       ` Josh Poimboeuf [this message]
2016-04-05 14:53         ` Miroslav Benes
2016-04-01 13:34 ` Miroslav Benes
2016-04-01 13:39 ` Petr Mladek
2016-04-01 15:38   ` Petr Mladek
2016-04-05 13:44   ` Josh Poimboeuf
2016-04-06  8:15     ` Petr Mladek
2016-04-28 18:53     ` Josh Poimboeuf
2016-06-09 14:20       ` Petr Mladek
2016-04-07 12:10 ` Petr Mladek
2016-04-07 15:08   ` Josh Poimboeuf
2016-04-07 15:47     ` Jiri Kosina
2016-04-07 18:03       ` Josh Poimboeuf
2016-04-07 18:33         ` Jiri Kosina

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=20160405143456.jyr4iol4jw233xll@treble.redhat.com \
    --to=jpoimboe@redhat.com \
    --cc=jeyu@redhat.com \
    --cc=jikos@kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=live-patching@vger.kernel.org \
    --cc=mbenes@suse.cz \
    --cc=vojtech@suse.com \
    /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 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).