Re: kdump detection in SCSI drivers

[Pavel Machek]

Hi!

> How do we "know" when little memory is available?

Kernel already scales its hash tables according to total RAM
available, perhaps you can use similar mechanism?

> Other suggestion which came about was to parse the kernel command line
> and look for "elfcorehdr=". Is this ok? Is kernel command line visible
> to the SCSI drivers?

Kernel command line probably is visible, but I'd recommend against
doing that.

							Pavel

> Cc: Linux-scsi@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx
> Subject: Re: kdump detection in SCSI drivers
> 
> > Hi,
> > 
> > Is there a standard way for drivers (RAID) to detect if the current
> > kernel is running in kdump mode? We would like to adjust driver
> behavior
> > dynamically when kdump is active by scaling down resources.
> 
> Perhaps you should be automatically using little resources when little
> memory is available, or something? 
> 
> With upcomping kjump patches, it is more "interesting" than kdump
> vs. no kdump.
> 	
> Pavel

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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