linux-kernel - Re: [Bug #11342] Linux 2.6.27-rc3: kernel BUG at mm/vmalloc.c

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Message-ID: <alpine.LFD.1.10.0808261644260.3363@nehalem.linux-foundation.org>
Date:	Tue, 26 Aug 2008 16:47:48 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Parag Warudkar <parag.lkml@...il.com>
cc:	Adrian Bunk <bunk@...sta.de>,
	Rusty Russell <rusty@...tcorp.com.au>,
	"Alan D. Brunelle" <Alan.Brunelle@...com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Arjan van de Ven <arjan@...ux.intel.com>,
	Ingo Molnar <mingo@...e.hu>, linux-embedded@...r.kernel.org
Subject: Re: [Bug #11342] Linux 2.6.27-rc3: kernel BUG at mm/vmalloc.c -
 bisected



On Tue, 26 Aug 2008, Parag Warudkar wrote:
> 
> This is something I never understood - embedded devices are not going
> to run more than a few processes and 4K*(Few Processes)
>  IMHO is not worth a saving now a days even in embedded world given
> falling memory prices. Or do I misunderstand?

Well, by that argument, 1% of kernel size doesn't matter either..

1% of a kernel for an embedded device is roughly 10-30kB or so depending 
on how small you make the configuration. 

If that matters, then so should the difference of 3-8 processes' kernel 
stack usage when you have a 4k/8k stack choice.

And they _all_ will have at least 3-8 processes on them. Even the simplest 
ones will tend to have many more.

			Linus
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