Re: Removing NET_NEEDS_GIANT: first patch

On Thu, 26 Jul 2007, Kris Kennaway wrote:

I've used and still use debug_mpsafenet to get rid of watchdog timeout problems on a lot of HP Proliant servers, particularly with the bge driver:

Dec 21 06:42:51 videovm1 kernel: bge0: watchdog timeout -- resetting
Dec 21 06:42:51 videovm1 kernel: bge0: link state changed to DOWN
Dec 21 06:42:54 videovm1 kernel: bge0: link state changed to UP

This problem goes away with debug.mpsafenet="0", for me.

I can try to turn off this setting, and see how it goes. I remember there was something one could do, to get more information about the watchdog error, but can't remember what.

Please do. There is no sense in crippling your network for the sake of an unre{solved,ported} driver bug.

I agree with what Kris said, only more so. :-) By masking the bug using debug.mpsafenet, whatever bug is the root of the problem isn't getting fixed, and instead keeps going out in releases. This sounds like it's most likely a driver bug, although I wouldn't rule out some sort of interrupt problem. It looks like jkim might be someone to talk to about this (CC'd).

Robert N M Watson
Computer Laboratory
University of Cambridge
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