| To: | Dave Peterson <dsp@xxxxxxxx> |
|---|---|
| Subject: | Re: possible bug in net/core/pktgen.c (2.6.10 kernel) |
| From: | "David S. Miller" <davem@xxxxxxxxxxxxx> |
| Date: | Tue, 18 Jan 2005 13:50:19 -0800 |
| Cc: | Robert.Olsson@xxxxxxxxxxx, robert.olsson@xxxxxxxxx, netdev@xxxxxxxxxxx |
| In-reply-to: | <200501181346.22905.dsp@llnl.gov> |
| References: | <200501141129.21461.dsp@llnl.gov> <200501180935.25419.dsp@llnl.gov> <20050118124100.17b7f47a.davem@davemloft.net> <200501181346.22905.dsp@llnl.gov> |
| Sender: | netdev-bounce@xxxxxxxxxxx |
On Tue, 18 Jan 2005 13:46:22 -0800 Dave Peterson <dsp@xxxxxxxx> wrote: > > 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. Great, looks like things are OK then. |
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