linux-kernel - Re: Shutdown problem in SMP system happened on Tegra20

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20120825075221.GH18957@n2100.arm.linux.org.uk>
Date:	Sat, 25 Aug 2012 08:52:21 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Shawn Guo <shawn.guo@...aro.org>
Cc:	Bill Huang <bilhuang@...dia.com>,
	"'linux-tegra@...r.kernel.org'" <linux-tegra@...r.kernel.org>,
	"'linux-kernel@...r.kernel.org'" <linux-kernel@...r.kernel.org>,
	"'linux-arm-kernel@...ts.infradead.org'" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: Shutdown problem in SMP system happened on Tegra20

On Sat, Aug 25, 2012 at 03:36:27PM +0800, Shawn Guo wrote:
> On Fri, Aug 24, 2012 at 07:21:33PM +0100, Russell King - ARM Linux wrote:
> > Why not just ensure that CONFIG_PM_SLEEP_SMP is enabled if your platform
> > requires that the lowest CPU number be the CPU dealing with reboot?
> 
> I have CONFIG_PM_SLEEP_SMP enabled for imx6q, but still see the imx6q
> restart hook running on cpu1 than cpu0.  It seems that
> disable_nonboot_cpus is only called in kernel_power_off but never
> kernel_restart.  We should probably patch kernel_restart or
> machine_restart to have disable_nonboot_cpus called? 

Remember that this path gets called from IRQ context which makes calling
functions which sleep very dodgy.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/