linux-kernel - Re: [PATCH 40/45] powerpc, irq: Use GFP_ATOMIC allocations in atomic context

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Message-ID: <20130625025858.GE14051@concordia>
Date:	Tue, 25 Jun 2013 12:58:58 +1000
From:	Michael Ellerman <michael@...erman.id.au>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>,
	tglx@...utronix.de, peterz@...radead.org, tj@...nel.org,
	oleg@...hat.com, paulmck@...ux.vnet.ibm.com, rusty@...tcorp.com.au,
	mingo@...nel.org, akpm@...ux-foundation.org, namhyung@...nel.org,
	walken@...gle.com, vincent.guittot@...aro.org,
	laijs@...fujitsu.com, rostedt@...dmis.org,
	wangyun@...ux.vnet.ibm.com, xiaoguangrong@...ux.vnet.ibm.com,
	sbw@....edu, fweisbec@...il.com, zhong@...ux.vnet.ibm.com,
	nikunj@...ux.vnet.ibm.com, linux-pm@...r.kernel.org,
	linux-arch@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Paul Mackerras <paulus@...ba.org>,
	Ian Munsie <imunsie@....ibm.com>
Subject: Re: [PATCH 40/45] powerpc, irq: Use GFP_ATOMIC allocations in atomic
 context

On Tue, Jun 25, 2013 at 12:13:04PM +1000, Benjamin Herrenschmidt wrote:
> On Tue, 2013-06-25 at 12:08 +1000, Michael Ellerman wrote:
> > We're not checking for allocation failure, which we should be.
> > 
> > But this code is only used on powermac and 85xx, so it should probably
> > just be a TODO to fix this up to handle the failure.
> 
> And what can we do if they fail ?

Fail up the chain and not unplug the CPU presumably.

cheers
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