netdev - Re: 2.6.20->2.6.21 - networking dies after random time

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Date:	Wed, 8 Aug 2007 13:11:20 +0200
From:	"Marcin Ślusarz" <marcin.slusarz@...il.com>
To:	"Jarek Poplawski" <jarkao2@...pl>
Cc:	"Ingo Molnar" <mingo@...e.hu>,
	"Thomas Gleixner" <tglx@...utronix.de>,
	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	"Jean-Baptiste Vignaud" <vignaud@...dmail.fr>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	shemminger <shemminger@...ux-foundation.org>,
	linux-net <linux-net@...r.kernel.org>,
	netdev <netdev@...r.kernel.org>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Alan Cox" <alan@...rguk.ukuu.org.uk>
Subject: Re: 2.6.20->2.6.21 - networking dies after random time

2007/8/7, Jarek Poplawski <jarkao2@...pl>:
> And here is one more patch to test the same idea (chip->retrigger()).
> Let's try i386 way! (I hope I will not be arrested for this...)
> (Should be tested without any previous patches.)
>
> Jarek P.
>
> PS: as above
>
> ---
>
> diff -Nurp 2.6.22.1-/arch/x86_64/kernel/io_apic.c 2.6.22.1/arch/x86_64/kernel/io_apic.c
> --- 2.6.22.1-/arch/x86_64/kernel/io_apic.c      2007-07-09 01:32:17.000000000 +0200
> +++ 2.6.22.1/arch/x86_64/kernel/io_apic.c       2007-08-07 14:37:45.000000000 +0200
> @@ -1311,15 +1311,8 @@ static unsigned int startup_ioapic_irq(u
>  static int ioapic_retrigger_irq(unsigned int irq)
>  {
>         struct irq_cfg *cfg = &irq_cfg[irq];
> -       cpumask_t mask;
> -       unsigned long flags;
> -
> -       spin_lock_irqsave(&vector_lock, flags);
> -       cpus_clear(mask);
> -       cpu_set(first_cpu(cfg->domain), mask);
>
> -       send_IPI_mask(mask, cfg->vector);
> -       spin_unlock_irqrestore(&vector_lock, flags);
> +       send_IPI_self(cfg->vector);
>
>         return 1;
>  }
>
Network card timed out with this patch.

Marcin
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