Messages in this thread | | | Subject | Re: [BUG] linux-2.6.28-rc3 regression: IRQ smp_affinities not respected | From | "Michael Chan" <> | Date | Wed, 26 Nov 2008 09:14:52 -0800 |
| |
On Wed, 2008-11-26 at 01:01 -0800, Eric Dumazet wrote: > Eric Dumazet a écrit : > > Michael Chan a écrit : > >> I believe this may be the patch that broke it: > >> > >> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=ce6fce4295ba727b36fdc73040e444bd1aae64cd > >> > >> > >> I don't remember all the details, but the Broadcom 5708 chip is > >> affected because it does not support MSI per-vector masking. > >> > >> One way to get around is to disable MSI with bnx2 parameter > >> disable_msi=1. > >> > > > > > I tried this MSI disabling and yes, it now works. > > > > 16: 42726 128 105 106 89 > > 89 145 152 IO-APIC-fasteoi uhci_hcd:usb1, eth0, eth1 > > > > I believe the bnx2 driver doesnt work at all if !disable_msi (default setting) > > Doing a "echo 0 >/sys/devices/system/cpu/cpu1/online" just freeze network > > No messages logged > > If loaded with disable_msi=1, the cpu unplug works as expected. > > Thats a pretty serious issue. > Yes, that's the same issue and it is serious. If MSI is being delivered to CPU 1 and you then take CPU 1 offline, the MSI will not be delivered to another CPU.
I think I can detect this problem in bnx2_timer() and try to recover. I'll post a patch when I have something ready. Thanks.
-- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |