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From: Mike Jakubik <mikej@rogers.com>
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To: Scott Long <scottl@samsco.org>
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Cc: stable@freebsd.org
Subject: Re: CALL FOR TESTERS! [Re: 6.2 SHOWSTOPPER - em completely unusable
 on 6.2]
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Scott Long wrote:
> All,
>
> Attached is my first cut at addressing the problems described in this 
> thread.  As I discussed earlier, the VM syncer thread is likely starving
> the USB interrupt thread.  This causes the shared usb+network 
> interrupt to remain masked, preventing network interrupts from being 
> delivered,
> and thus triggering watchdog timeouts.

Just to be clear, has it been established that the problem only occurs 
when em is sharing an interrupt? I have a lot of production machines 
using the PDSMi board, which is one of the boards that the problem was 
noticed on, however i do not share any irqs, i always disable USB in the 
BIOS.

# vmstat -i
interrupt                          total       rate
irq16: em0                      13001181          7
irq19: atapci0                  76559511         42
cpu0: timer                   3643365617       1999
cpu1: timer                   3643365610       1999
Total                         7376291919       4048