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Date:      Wed, 31 Oct 2007 13:56:59 +0300
From:      Vladimir Ivanov <wawa@yandex-team.ru>
To:        Jack Vogel <jfvogel@gmail.com>
Cc:        "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>, FreeBSD Stable List <freebsd-stable@freebsd.org>
Subject:   Re: em watchdogs - OS involvement
Message-ID:  <47285F7B.7010809@yandex-team.ru>
In-Reply-To: <2a41acea0710301317w8e820f2pdbd7f3ca1e1f6a30@mail.gmail.com>
References:  <2a41acea0710301317w8e820f2pdbd7f3ca1e1f6a30@mail.gmail.com>

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Jack Vogel wrote:
> Things just keep getting stranger... its no wonder I didn't see this...
> 
> I had been trying to repro the watchdog on a machine in my cube at work
> without success, but in the test Lab they were successful. I scratched my
> head for a while wondering why...
> 
> But then I realized I had the Sept snapshot in my cube, reinstalled it to
> the Oct snapshot and now it watchdogs like a champ too.....
> 
> Another bit of data, if I define DEVICE_POLLING on the Oct. snap it
> also will work.
> 
> SOOOOO, what changes were made to interrupts between Sept and
> October, something I need to do perhaps that wasnt done??
> 
> Any ideas??

Shared irq is a very big problem w/FAST_INTR seems to be. There are a 
lot of drops if ethernet shares IRQ w/UHCI e.g.
Maybe you've seen this issue.

> 
> Jack
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