linux-kernel - Re: Revert "gro: Fix legacy path napi_complete crash", (was: Re: Linux 2.6.29)

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Message-ID: <20090324153616.GA31143@elte.hu>
Date:	Tue, 24 Mar 2009 16:36:16 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	Robert Schwebel <r.schwebel@...gutronix.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Frank Blaschka <blaschka@...ux.vnet.ibm.com>,
	"David S. Miller" <davem@...emloft.net>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	kernel@...gutronix.de
Subject: Re: Revert "gro: Fix legacy path napi_complete crash", (was: Re:
	Linux 2.6.29)


* Herbert Xu <herbert@...dor.apana.org.au> wrote:

> On Tue, Mar 24, 2009 at 03:39:42PM +0100, Ingo Molnar wrote:
> >
> > Subject: [PATCH] net: Fix netpoll lockup in legacy receive path
> 
> Actually, this patch is still racy.  If some interrupt comes in
> and we suddenly get the maximum amount of backlog we can still
> hang when we call __napi_complete incorrectly.  It's unlikely
> but we certainly shouldn't allow that.  Here's a better version.
> 
> net: Fix netpoll lockup in legacy receive path

ok - i'm testing with this now.

	Ingo
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