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From: Sudeep Holla <sudeep.holla@arm.com>
To: linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	Thomas Gleixner <tglx@linutronix.de>
Cc: Sudeep Holla <sudeep.holla@arm.com>
Subject: Re: [PATCH 3/3] clockevents: warn if cpu_all_mask is used for cpumask while registering new device
Date: Thu, 2 Aug 2018 13:39:37 +0100	[thread overview]
Message-ID: <988e86c6-92bb-b73d-068b-04dfbc0fffda@arm.com> (raw)
In-Reply-To: <1531308264-24220-3-git-send-email-sudeep.holla@arm.com>

Hi Thomas,

On 11/07/18 12:24, Sudeep Holla wrote:
> Using cpu_all_mask in clockevents cpumask may result in issues while
> comparing multiple clockevent devices to choose the preferred one.
> On one of the platforms with 2 system(i.e. non per-CPU) timers with
> different ratings, having cpu_all_mask for one of the device resulted
> in boot hang with forever loop in clockevents_notify_released as both
> were being selected as preferred.
> 
> In order to prevent such issues in future, let's warn if any clockevent
> drivers sets cpu_all_mask as it's cpumask and just override it to use
> cpu_possible_mask. All the existing occurrences of cpu_all_mask are
> already replaced with cpu_possible_mask.
> 

Daniel has picked up patch 1/3, do you want me to resend this patch 2
and 3 again or you happy to pick them ?

-- 
Regards,
Sudeep

  reply	other threads:[~2018-08-02 12:39 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-11 11:24 [PATCH 1/3] clocksource: drivers: set clockevent device cpumask to cpu_possible_mask Sudeep Holla
2018-07-11 11:24 ` [PATCH 2/3] tick: broadcast-hrtimer: use cpu_possible_mask for ce_broadcast_hrtimer Sudeep Holla
2018-08-02 12:58   ` [tip:timers/core] tick/broadcast-hrtimer: Use " tip-bot for Sudeep Holla
2018-07-11 11:24 ` [PATCH 3/3] clockevents: warn if cpu_all_mask is used for cpumask while registering new device Sudeep Holla
2018-08-02 12:39   ` Sudeep Holla [this message]
2018-08-02 12:58   ` [tip:timers/core] clockevents: Warn if cpu_all_mask is used as cpumask tip-bot for Sudeep Holla
2018-07-11 11:36 ` [PATCH 1/3] clocksource: drivers: set clockevent device cpumask to cpu_possible_mask Daniel Lezcano
2018-07-11 13:42   ` Sudeep Holla
2018-07-11 16:38     ` Daniel Lezcano
2018-07-13 22:45       ` Thomas Gleixner

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