Re: [Fastboot] [RFC] [PATCH 2/2] kdump: cciss driver initialization issue fix

[ebiederm@xmission.com (Eric W. Biederman)]

Vivek Goyal <vgoyal@in.ibm.com> writes:

> On Mon, Jun 26, 2006 at 10:00:55AM -0600, Eric W. Biederman wrote:

> I think it does hurt.
>
> - I have seen the case of MPT fusion drvier. It takes significantly more
>   time to come up if we choose to reset the device during initialization.
>   One of the reasons that we wait in a tight loop for the controller to 
>   come up after a reset message.
>
> - Long back we fixed ips driver and I remember that the maintainer had
>   a similar issue with the reset of device. He did not want to reset the
>   device in normal boot because otherwise it took significantly longer
>   for the driver to initialize.
>
> - Just now Mike also confirmed that resetting the device definitely
>   hurts in terms of time.

In the general case resets are trivial operations.  In scsi land 
things are different.  So a solution appropriate to that domain may
be appropriate.

Eric
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