From: Thomas Gleixner <tglx@linutronix.de>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
John Stultz <john.stultz@linaro.org>, Ingo Molnar <mingo@elte.hu>,
Ben Greear <greearb@candelatech.com>,
stable@kernel.org
Subject: Re: [patch 3/3] rtc: Limit frequency
Date: Sat, 23 Jul 2011 09:17:01 +0200 (CEST) [thread overview]
Message-ID: <alpine.LFD.2.02.1107230916000.2702@ionos> (raw)
In-Reply-To: <20110722150550.1878f069.akpm@linux-foundation.org>
On Fri, 22 Jul 2011, Andrew Morton wrote:
> On Fri, 22 Jul 2011 09:12:51 -0000
> Thomas Gleixner <tglx@linutronix.de> wrote:
>
> > The RTC hrtimer is self rearming. We really need to limit the
> > frequency to something sensible.
>
> > Cc: stable@kernel.org
>
> Why? What failures does the current code cause? What effect do these
> failures have upon users?
Due to the hrtimer self rearming mode a user can DoS the machine
simply because it's starved by hrtimer events.
next prev parent reply other threads:[~2011-07-23 7:17 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-22 9:12 [patch 0/3] rtc: Assorted bug fixes Thomas Gleixner
2011-07-22 9:12 ` [patch 1/3] rtc: Handle errors correctly in rtc_irq_set_state() Thomas Gleixner
2011-07-22 22:04 ` Andrew Morton
2011-07-23 7:15 ` Thomas Gleixner
2011-07-22 9:12 ` [patch 3/3] rtc: Limit frequency Thomas Gleixner
2011-07-22 22:05 ` Andrew Morton
2011-07-22 22:39 ` [stable] " Willy Tarreau
2011-08-05 3:39 ` Joshua Kinard
2011-08-05 9:04 ` John Stultz
2011-08-06 7:28 ` Joshua Kinard
2011-07-23 7:17 ` Thomas Gleixner [this message]
2011-07-22 9:12 ` [patch 2/3] rtc: Fix hrtimer deadlock Thomas Gleixner
2011-07-22 22:11 ` Andrew Morton
2011-07-23 7:22 ` Thomas Gleixner
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