Anze Zagar wrote: > On Tue, 2009-09-08 at 23:27 +0200, Jan Kiszka wrote: >>> The last line dumps the following output in the dmesg (see attached >>> dump.txt for the entire dmesg dump): >>> rt_e1000_new 0000:0d:00.0: irq 52 for MSI/MSI-X >>> rt_e1000_new 0000:0d:00.0: irq 52 for MSI/MSI-X >>> irq event 52: bogus return value 2fb07cb0 >>> Pid: 0, comm: swapper Not tainted 2.6.30-xenomai-2.4.9 #3 >>> Call Trace: >>> [<ffffffff8026c690>] ? __report_bad_irq+0x30/0x7d >>> [<ffffffff8026c743>] ? note_interrupt+0x66/0x153 >>> [<ffffffff8026d398>] ? handle_edge_irq+0xe4/0x114 >>> [<ffffffff8020e315>] ? handle_irq+0x81/0x8a >>> [<ffffffff8020da0c>] ? do_IRQ+0x5a/0xa3 >>> [<ffffffff8020d9b2>] ? do_IRQ+0x0/0xa3 >>> [<ffffffff802702f4>] ? __ipipe_sync_stage+0x166/0x16c >>> [<ffffffff802702fa>] ? __xirq_end+0x0/0x6b >>> [<ffffffff8021faef>] ? __ipipe_handle_irq+0x18a/0x275 >>> [<ffffffff8020c493>] ? common_interrupt+0x13/0x2c >>> [<ffffffff802120c9>] ? default_idle+0x8f/0x105 >>> [<ffffffff80505b22>] ? __atomic_notifier_call_chain+0x46/0x69 >>> [<ffffffff8020aadb>] ? cpu_idle+0x59/0x8b >>> handlers: >>> [<ffffffffa0360f33>] (e1000_intr_msi_test+0x0/0x71 [rt_e1000_new]) >>> rt_e1000_new 0000:0d:00.0: irq 52 for MSI/MSI-X >>> e1000: rteth0: e1000_watchdog_task: NIC Link is Up 1000 Mbps Full >>> Duplex, Flow Control: RX/TX >>> >> Hmm, the msi-test IRQ seems to trigger this mess. Could you try if >> disabling CONFIG_PCI_MSI changes the picture. > > Yes, by disabling CONFIG_PCI_MSI this error no longer occurs. Can I > expect any performance degradation due to that? >
Nothing relevant. But you may run earlier into IRQ conflicts with Linux devices. > >> Mathias, did you successfully tested or even used your driver with MSI >> interrupts? >> >>> >>> Note also that in order to build the experimental e1000 driver on this >>> 64-bit system, I needed to patch the code a little: >>> --- drivers/experimental/e1000/e1000_main.c 2009-08-29 >>> 17:41:04.000000000 +0200 >>> +++ drivers/experimental/e1000/e1000_main.c~ 2009-02-28 >>> 14:34:03.000000000 +0100 >>> @@ -305,3 +305,3 @@ >>> static int e1000_intr(rtdm_irq_t *irq_handle); >>> -static irqreturn_t e1000_intr_msi(rtdm_irq_t *irq_handle); >>> +static int e1000_intr_msi(rtdm_irq_t *irq_handle); >>> static bool e1000_clean_tx_irq(struct e1000_adapter *adapter, >> This doesn't apply to git head. What version are you using, what >> patches? > > I used the 0.9.11 release and the git head from about 10 days ago. Now, > with the latest head, this has already been fixed. Something must have went wrong on your side as the repos didn't change in this area (see logs). Jan
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