linux-kernel - Re: [PATCH] x86, kdump: Set crashkernel

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Message-ID: <CAE9FiQUPVP59Ngo2TGABD-vwVRA7rhgE+MgBCT1b=U_EQgsUdQ@mail.gmail.com>
Date:	Mon, 11 Mar 2013 13:57:41 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Vivek Goyal <vgoyal@...hat.com>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...nel.org>,
	WANG Chao <chaowang@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86, kdump: Set crashkernel_low automatically

On Mon, Mar 11, 2013 at 1:45 PM, Vivek Goyal <vgoyal@...hat.com> wrote:
> In my experience, trying to keep foot-print small has kind of been a
> losing battle.
>
> - People want more functionality in second kernel, want to dump to more
>   complicated IO stacks and that requires pulling in more drivers,
>   more libraries, more daemons, more user space tools and what not.
>
> - Now we use dracut generated initramfs and it has been growing in size.
>   Now systemd has been pulled in too.
>
> - Drivers keep on increasing their memory usage.

If the dump file will be only put one place, why should all the drivers
for all devices get loaded?
for example: dump will be on disk with one scsi controller, can you only
load driver that contoller? and forget about all other storage controller and
network etc drivers.

Thanks

Yinghai
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