MIME-Version: 1.0
In-Reply-To: <20150222150148.3c566837.akpm@linux-foundation.org>
References: <20150220194901.GB3603@gmail.com>
	<20150220214613.GA21598@suse.com>
	<20150221181852.GA8406@gmail.com>
	<alpine.LNX.2.00.1502211952120.2357@pobox.suse.cz>
	<20150221191607.GA9534@gmail.com>
	<alpine.LNX.2.00.1502212025450.2357@pobox.suse.cz>
	<20150221194840.GA10126@gmail.com>
	<alpine.LNX.2.00.1502212058080.2357@pobox.suse.cz>
	<20150222084601.GA23491@gmail.com>
	<20150222094639.GA23684@gmail.com>
	<20150222104841.GA25335@gmail.com>
	<alpine.LNX.2.00.1502222004540.19920@pobox.suse.cz>
	<20150222150148.3c566837.akpm@linux-foundation.org>
Date: Mon, 23 Feb 2015 10:18:54 +1000
Message-ID: <CAPM=9tyudKWTXr3E7KQcH7guWY4TBOBFB6GxpS24wARhict2cw@mail.gmail.com>
Subject: Re: live kernel upgrades (was: live kernel patching design)
From: Dave Airlie <airlied@gmail.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Jiri Kosina <jkosina@suse.cz>, Ingo Molnar <mingo@kernel.org>,
        Vojtech Pavlik <vojtech@suse.com>,
        Josh Poimboeuf <jpoimboe@redhat.com>,
        Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@redhat.com>,
        Seth Jennings <sjenning@redhat.com>,
        LKML <linux-kernel@vger.kernel.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Arjan van de Ven <arjan@infradead.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Borislav Petkov <bp@alien8.de>, live-patching@vger.kernel.org
Content-Type: text/plain; charset=UTF-8
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 872
Lines: 20

On 23 February 2015 at 09:01, Andrew Morton <akpm@linux-foundation.org> wrote:
> On Sun, 22 Feb 2015 20:13:28 +0100 (CET) Jiri Kosina <jkosina@suse.cz> wrote:
>
>> But if you ask the folks who are hungry for live bug patching, they
>> wouldn't care.
>>
>> You mentioned "10 seconds", that's more or less equal to infinity to them.
>
> 10 seconds outage is unacceptable, but we're running our service on a
> single machine with no failover.  Who is doing this??

if I had to guess, telcos generally, you've only got one wire between a phone
and the exchange and if the switch on the end needs patching it better be fast.

Dave.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/