netdev - Re: [PATCH] netpoll: use non-BH variant of RCU

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Message-ID: <20100811122026.GB2587@linux.vnet.ibm.com>
Date:	Wed, 11 Aug 2010 05:20:26 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	David Miller <davem@...emloft.net>, linville@...driver.com,
	netdev@...r.kernel.org
Subject: Re: [PATCH] netpoll: use non-BH variant of RCU

On Wed, Aug 11, 2010 at 07:03:30AM -0400, Herbert Xu wrote:
> On Tue, Aug 10, 2010 at 04:31:17PM -0700, David Miller wrote:
> >
> > Linus's tree is fine for this.
> > 
> > But we need this fix for 2.6.35-stable too.  Herbert would
> > you object to putting John's more simple fix there?
> 
> To use rcu_read_lock safely we'd also need to add do synchronize_rcu
> in addition of synchronize_rcu_bh, right Paul?

That is true.

> Of course as we were doing this unsafely prior to my patch anyway
> I'm also fine with just reverting it.

That is true as well.

							Thanx, Paul
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