From: Guenter Roeck <guenter.roeck@ericsson.com>
To: Fenghua Yu <fenghua.yu@intel.com>
Cc: Rudolf Marek <r.marek@assembler.cz>,
Huaxu Wan <huaxu.wan@intel.com>, H Peter Anvin <hpa@zytor.com>,
Chen Gong <gong.chen@linux.intel.com>,
Jean Delvare <khali@linux-fr.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
lm-sensors <lm-sensors@lm-sensors.org>
Subject: Re: [lm-sensors] [PATCH] drivers/hwmon/coretemp: Fix incorrect hot-removed CPU's core sensor issue
Date: Thu, 19 Aug 2010 10:07:17 -0700 [thread overview]
Message-ID: <20100819170717.GA4312@ericsson.com> (raw)
In-Reply-To: <1282172027-640-1-git-send-email-fenghua.yu@intel.com>
On Wed, Aug 18, 2010 at 06:53:45PM -0400, Fenghua Yu wrote:
> From: Fenghua Yu <fenghua.yu@intel.com>
>
> In current coretemp driver, when a CPU in dev_list is hot-removed, although its
> HT sibling is still running, its core sensor is gone and not available to user
> level application any more.
>
> When a CPU is hot-removed, its core sensor should be still available to upper
> level application as long as the hot-removed CPU's HT sibling is still running.
> A core sensor is invisible to user level only when all of siblings in a core are
> hot-removed.
>
Isn't that just a short term (ie a couple of ms or even us) race condition
until the sibling is removed as well ? If so, why bother ?
Thanks,
Guenter
next prev parent reply other threads:[~2010-08-19 17:08 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-18 22:53 [PATCH] drivers/hwmon/coretemp: Fix incorrect hot-removed CPU's core sensor issue Fenghua Yu
2010-08-18 22:53 ` [PATCH] drivers/hwmon/coretemp: Remove warnings of unused variables Fenghua Yu
2010-08-19 7:24 ` Jean Delvare
2010-08-19 19:04 ` H. Peter Anvin
2010-08-19 21:26 ` Jean Delvare
2010-08-19 21:28 ` H. Peter Anvin
2010-08-19 21:32 ` Jean Delvare
2010-08-19 21:51 ` [lm-sensors] " Guenter Roeck
2010-09-04 12:39 ` Jean Delvare
2010-09-04 14:30 ` Guenter Roeck
2010-09-04 16:17 ` Jean Delvare
2010-08-18 22:53 ` [PATCH] drivers/hwmon/pkgtemp: Fix improper locking in CPU hot remove Fenghua Yu
2010-08-19 17:07 ` Guenter Roeck [this message]
2010-08-20 8:26 ` [PATCH] drivers/hwmon/coretemp: Fix incorrect hot-removed CPU's core sensor issue Jean Delvare
2010-08-20 21:53 ` Fenghua Yu
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