Messages in this thread | | | Date | Mon, 17 Aug 2009 18:03:23 -0700 (PDT) | Subject | Re: new ipdelay= option for faster netboot | From | David Miller <> |
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From: Tim Bird <tim.bird@am.sony.com> Date: Mon, 17 Aug 2009 15:35:01 -0700
> Tim Bird wrote: >> See the definitions of CONF_PRE_OPEN and CON_POST_OPEN >> in net/ipv4/ipconfig.c >> >> They are set to ridiculously long values. In my experience, >> you can cut them down considerably with no dangerous side >> effects (but I haven't asked the network guys about the >> possible downsides). > > It turns out that others have seen this delay. Simon > Arlott recently posted a patch to make the delay avoidable > at boot time from the kernel command line. > > See http://patchwork.kernel.org/patch/31678/
"Rediculiously long" is a relative term.
I have card/switch combinations that take up to 10 seconds to negotiate a proper link.
So what's there now is actually a quite agressive setting.
And BTW, discussions about stuff like this belong on netdev@vger.kernel.org, which has been added to the CC:
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