linux-kernel - Re: [PATCH] Driver Core: devtmpfs - kernel-maintained tmpfs-based /dev

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]

Message-Id: <200908110648.26191.a1426z@gawab.com>
Date:	Tue, 11 Aug 2009 06:48:26 +0300
From:	Al Boldi <a1426z@...ab.com>
To:	Greg KH <greg@...ah.com>
Cc:	Chris Friesen <cfriesen@...tel.com>,
	Andi Kleen <andi@...stfloor.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	linux-kernel@...r.kernel.org, Kay Sievers <kay.sievers@...y.org>,
	Jan Blunck <jblunck@...e.de>, gregkh@...e.de,
	Harald Hoyer <harald@...hat.com>,
	Scott James Remnant <scott@...ntu.com>
Subject: Re: [PATCH] Driver Core: devtmpfs - kernel-maintained tmpfs-based /dev

Greg KH wrote:
> On Sat, Aug 08, 2009 at 09:55:24PM +0300, Al Boldi wrote:
> > Greg KH wrote:
> > > On Sat, Aug 08, 2009 at 12:14:39PM +0300, Al Boldi wrote:
> > > > Greg KH wrote:
> > > > > On Sat, Aug 08, 2009 at 12:17:31AM +0300, Al Boldi wrote:
> > > > > > For devtmpfs to be a realistic replacement for static /dev, it
> > > > > > has to be comparable to static /dev in both speed and size.
> > > > >
> > > > > Since when is this requirement necessary?  You want something for
> > > > > free in both speed and size?  Well, you got it in speed, but not
> > > > > size, it will take up memory that is swapable, and a tiny ammount
> > > > > of non-swapable kernel memory for the code.
> > > >
> > > > Not so tiny when you count in the hotplug dependency.
> > >
> > > devtmpfs does not rely on hotplug at all.
> >
> > Are you sure?
> >
> > This is from the patch of this thread:
> > > +config DEVTMPFS
> > > +       bool "Create a kernel maintained /dev tmpfs (EXPERIMENTAL)"
> > > +       depends on HOTPLUG && SHMEM && TMPFS
>
> Ah, you're right.
>
> Ok then, since you don't run CONFIG_HOTPLUG kernels, why are you worried
> about this code at all?
>
> confused,

Linux used to be lean and mean which made it fun to work with, and which made 
the switch from the competition easy.  Nowadays I see a lot of bloat going 
into the kernel which may indicate that Linux is starting to run out of 
steam.  devtmpfs seems bloaty due to the hotplug dependency.


Thanks!

--
Al

--
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/