From mboxrd@z Thu Jan  1 00:00:00 1970
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
In-reply-to: Your message of "Wed, 06 Jul 2011 11:40:08 PDT."
	<20110706184008.AC595B827@mail.bitblocks.com>
References: <20110706184008.AC595B827@mail.bitblocks.com>
Date: Thu,  7 Jul 2011 00:53:50 -0700
From: Bakul Shah <bakul@bitblocks.com>
Message-Id: <20110707075350.0BCF1B827@mail.bitblocks.com>
Subject: Re: [9fans] 9atom & virtualbox 4.0.10 networking issue
Topicbox-Message-UUID: fb512ba8-ead6-11e9-9d60-3106f5b1d025

On Wed, 06 Jul 2011 11:40:08 PDT Bakul Shah <bakul@bitblocks.com>  wrote:
> Good news: 9atom installs fine on virtualbox 4.0.10 (the
>    latest) and most everything works
> Bad news: network access fails

It seems igbe never gets an interrupt (as per ether0/ifstats
rintr == 0, rsleep == 1).  Pkts received count going up may
have to do with some emulated h/w counter incremented by vbox.

To test this theory I changed code to call igbeinterrupt()
every 4 ticks instead of a real interrupt. In igberproc() I
replaced

        sleep(&ctrl->rrendez, igberim, ctlr);
with
        tsleep(&up->sleep, return0, 0, 4);
        igbeinterrupt(0, edev);

And things seem to be working well enough for '9fs sources'
etc.!  Note: this is just a test hack. Ideally interrupt
handling under vbox is fixed up by someone knowledgeable (I
haven't dealt with this stuff in ages).