On Wed, 2008-11-26 at 01:01 -0800, Eric Dumazet wrote:

Eric Dumazet a écrit :

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Michael Chan a écrit :

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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.

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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.