From: Thomas Gleixner <tglx@linutronix.de>
To: Russell King <rmk+lkml@arm.linux.org.uk>
Cc: Linux Kernel List <linux-kernel@vger.kernel.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Andrew Morton <akpm@linux-foundation.org>,
Ingo Molnar <mingo@elte.hu>
Subject: Re: 044d408409cc4e1bc75c886e27ca85c270db104c causes warnings
Date: Fri, 1 May 2009 15:25:01 +0200 (CEST) [thread overview]
Message-ID: <alpine.LFD.2.00.0905011524310.3375@localhost.localdomain> (raw)
In-Reply-To: <20090501105734.GA27799@flint.arm.linux.org.uk>
On Fri, 1 May 2009, Russell King wrote:
> People have been complaining about this new warning which has appeared,
> but unfortunately none of them seem to have reported this to the relevent
> people. I've just had someone else mention about this, so I guess I'm
> going to have to do the legwork for them...
>
> Adding the WARN_ONCE() in 044d408409cc4e1bc75c886e27ca85c270db104c
> causes warnings to appear on ARM. Eg,
>
> WARNING: at /build/linux/kernel/irq/handle.c:353 handle_IRQ_event+0x58/0xd8()
> BUG: IRQ handler called from non-hardirq context!
> Backtrace:
> [<c0460e60>] (handle_IRQ_event+0x0/0xd8) from [<c046257c>] (handle_edge_irq+0x114/0x150)
> [<c0462468>] (handle_edge_irq+0x0/0x150) from [<c0461b80>] (resend_irqs+0x48/0x80)
> [<c0461b38>] (resend_irqs+0x0/0x80) from [<c043ffa8>] (tasklet_action+0x88/0xe0)
> [<c043ff20>] (tasklet_action+0x0/0xe0) from [<c043f9e0>] (__do_softirq+0x68/0x104)
>
> to which tglx said:
>
> --- Day changed Mon Mar 30 2009
> 17:03 < tglx> rmk: hmpf
> 17:44 < rmk> tglx: seems to be nicely reproducable when accessing stuff via a PCMCIA NE2K NIC on PXA
> 17:44 < tglx> sure
> 17:44 < tglx> I know why it triggers
> 17:45 < tglx> darn
> 17:53 < tglx> the warn_once is crap when you use the resend mechanism, which runs in a tasklet :(
>
> So the question is: what's happening about this?
Queued a revert for linus.
Thanks,
tglx
prev parent reply other threads:[~2009-05-01 13:26 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-01 10:57 Russell King
2009-05-01 13:25 ` Thomas Gleixner [this message]
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