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Date: Mon, 11 Jul 2011 20:27:17 -0700 (PDT) From: David Miller <davem@...emloft.net> To: ronny.meeus@...il.com Cc: netdev@...r.kernel.org Subject: Re: [PATCH] [PATCH] Fix deadlock in af_packet while stressing raw ethernet socket interface From: Ronny Meeus <ronny.meeus@...il.com> Date: Sat, 11 Jun 2011 07:04:09 +0200 > I was running a test: 1 application was sending raw Ethernet packets > on a physical looped interface while a second application was > receiving packets, so the latter application receives each packet 2 > times (once while sending from the context of the first application > and a second time while receiving from the hardware). After some > time, the test blocks due to a spinlock reentrance issue in > af_packet. Both the sending application and the softIRQ receiving > packets enter the spinlock code. After applying the patch below, the > issue is resolved. > > Signed-off-by: Ronny Meeus <ronny.meeus@...il.com> The packet receive hooks should always be called with software interrupts disabled, it is a bug if this is not happening. Your patch should not be necessary at all. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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