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

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Message-ID: <48B48B11.8050000@cisco.com>
Date:	Tue, 26 Aug 2008 16:00:33 -0700
From:	David VomLehn <dvomlehn@...co.com>
To:	Parag Warudkar <parag.lkml@...il.com>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>,
	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

Parag Warudkar wrote:
> On Tue, Aug 26, 2008 at 5:04 PM, Linus Torvalds
> <torvalds@...ux-foundation.org> wrote:
> 
>> And embedded people (the ones that might care about 1% code size) are the
>> ones that would also want smaller stacks even more!
> 
> 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?

Embedded applications span a huge range of sizes, from the very small devices to 
which you refer, to quite complex devices. The cable settop boxes we develop have 
over a hundred interrupt sources, typically run 250-300 threads, and have 192+ 
MiB of memory. For all that, we are very cost sensitive and are under constant 
pressure to come up with reliable ways to save memory.

> Parag
--
David VomLehn


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