linux-kernel - Re: [PATCH] pci-sysfs: replace mutex_lock with mutex_trylock to avoid potential deadlock situation

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Message-ID: <51062ADA.6080903@huawei.com>
Date:	Mon, 28 Jan 2013 15:38:02 +0800
From:	Jiang Liu <jiang.liu@...wei.com>
To:	Yinghai Lu <yinghai@...nel.org>
CC:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Gu Zheng <guz.fnst@...fujitsu.com>,
	Lin Feng <linfeng@...fujitsu.com>, <linux-pci@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <tangchen@...fujitsu.com>,
	<laijs@...fujitsu.com>, <wency@...fujitsu.com>,
	<izumi.taku@...fujitsu.com>, Don Dutile <ddutile@...hat.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH] pci-sysfs: replace mutex_lock with mutex_trylock to avoid
 potential deadlock situation

Hi all,
	I have worked out a draft patch set to serialize hotplug operations,
but encountered some obstacles when dealing with PCI root buses. I will
try to rebase the patch set onto "PCI: Iterate pci host bridge instead of
pci root bus" from Yinghai. And also need to fix bugs reported by Lin Feng
too.

Regards!
Gerry

On 2013-1-26 4:59, Yinghai Lu wrote:
> On Fri, Jan 25, 2013 at 12:30 PM, Bjorn Helgaas <bhelgaas@...gle.com> wrote:
> 
>> If we're going to fix the sysfs deadlock (and we should), I want to
>> either see an argument for why we don't have a problem outside of
>> sysfs, or I want to fix sysfs and non-sysfs at the same time.
> 
> Sure.
> 
> Jiang should have one patches to address that?
> 
> Yinghai
> 
> 


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