linux-kernel - Re: x86: 4kstacks default

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Sun, 20 Apr 2008 10:42:28 +0300
From:	Adrian Bunk <bunk@...nel.org>
To:	Eric Sandeen <sandeen@...deen.net>
Cc:	Oliver Pinter <oliver.pntr@...il.com>, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Christoph Hellwig <hch@...radead.org>,
	David Chinner <dgc@....com>, xfs@....sgi.com
Subject: Re: x86: 4kstacks default

On Sat, Apr 19, 2008 at 08:56:09PM -0500, Eric Sandeen wrote:
> Adrian Bunk wrote:
> > On Sat, Apr 19, 2008 at 04:35:31PM +0200, Oliver Pinter wrote:
> >> ...
> >> with the older kernel is typical: xfs+nfs+4k stack(+lvm)
> > 
> > Does anyone still experience problems with 2.6.25?
> 
> There are always problems.  You can always come up with something that
> will crash in 4k, IMHO.

We are going from 6k to 4k.

Your "You can always come up with something that will crash in" point 
would be invariant to this change (although it might be harder to 
trigger in real life).

> Rather than foisting this upon everyone, I'd rather see work put into
> making stack size a boot parameter or something, so that people can
> choose what's appropriate for their workload (or their IO stack, if you
> prefer).

Why should users have to poke with such deeply internal things?
That doesn't sound right.

Excessive stack usage in the kernel is considered to be a bug.

We should identify and fix all remaining problems (if any).

> -Eric

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/