lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Wed, 02 May 2007 03:38:53 -0400
From:	Jeff Garzik <>
To:	David Miller <>
Subject: Re: [PATCH 17/20][BNX2]: Enhance the heartbeat.

David Miller wrote:
> From: Jeff Garzik <>
> Date: Wed, 02 May 2007 03:17:20 -0400
>> Michael Chan wrote:
>>> [BNX2]: Enhance the heartbeat.
>>> In addition to the periodic heartbeat, we're adding a heartbeat
>>> request interrupt when the heartbeat is late.  This is useful
>>> especially in -rt kernels where the timer frequently runs late.
>>> Signed-off-by: Michael Chan <>
>> Should we really be adding code for such a special situation to upstream 
>> code?
>> I lean towards "no", but defer to your and DaveM's judgement here.
> My understanding of this situation is that if the timer is delayed a
> lot, which can happen with the -rt kernel, we don't send the heartbeat
> ping to the chip within the required margin.
> If the margin is not met, the ASF firmware takes this as a signal that
> the host system is down, and does things like reset the network card
> and other things we don't want it to do.

Thanks for the explanation.

My main concern was

* adding code to use a kernel facility
* then, adding code to handle when that kernel facility doesn't work

and also

* adding code for a situation that never occurs in the upstream kernel.



To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to
More majordomo info at

Powered by blists - more mailing lists