From: Dave Peterson <dsp@llnl.gov>
To: "David S. Miller" <davem@davemloft.net>
Cc: Robert.Olsson@data.slu.se, robert.olsson@its.uu.se, netdev@oss.sgi.com
Subject: Re: possible bug in net/core/pktgen.c (2.6.10 kernel)
Date: Tue, 18 Jan 2005 13:46:22 -0800 [thread overview]
Message-ID: <200501181346.22905.dsp@llnl.gov> (raw)
In-Reply-To: <20050118124100.17b7f47a.davem@davemloft.net>
On Tuesday 18 January 2005 12:41 pm, David S. Miller wrote:
> I'm still a little bit confused on this one.
>
> Since when does do_softirq() need preemption disabled
> around calls to it?
>
> do_softirq() disabled hard IRQs during the duration of it's
> execution, thus effectively disabling preemption.
>
> What is the problematic case again?
Oops... My mistake. Looking at __do_softirq() I noticed that it enables
interrupts before executing the softirqs. However I didn't notice that
the call to local_bh_disable() in __do_softirq() disables preemption
before interrupts are enabled. On second thought everything looks OK
and no bug fix is needed.
Dave
next prev parent reply other threads:[~2005-01-18 21:46 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-14 19:29 possible bug in net/core/pktgen.c (2.6.10 kernel) Dave Peterson
2005-01-16 12:46 ` Robert Olsson
2005-01-18 17:35 ` Dave Peterson
2005-01-18 20:41 ` David S. Miller
2005-01-18 21:46 ` Dave Peterson [this message]
2005-01-18 21:50 ` David S. Miller
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