On Tue, 20 Nov 2007 23:58:38 +0100
Helge Deller <[EMAIL PROTECTED]> wrote:
> David Schwartz wrote:
> > Any UUID generator that can produce duplicate UUIDs with probability
> > significantly less than purely random UUIDs is so badly broken that it
> > should not ever be used. Anyone who finds such
On Wed, Nov 21, 2007 at 12:11:57AM +0100, Helge Deller wrote:
> On Tuesday 20 November 2007, Matt Mackall wrote:
> > On Tue, Nov 20, 2007 at 10:59:58PM +0100, Helge Deller wrote:
> > > > > Current implemenations use userspace-libraries. In userspace you e.g.
> > > > > can't
> > > > > easily
On Wednesday 21 November 2007, Theodore Tso wrote:
> On Tue, Nov 20, 2007 at 10:59:58PM +0100, Helge Deller wrote:
> > > Even with a futex? Or userspace atomics?
> >
> > Yes, you'll need a futex or similiar.
> >
> > The problem is then more, where will you put that futex to be able
> > to
On Tuesday 20 November 2007, Matt Mackall wrote:
> On Tue, Nov 20, 2007 at 10:59:58PM +0100, Helge Deller wrote:
> > > > Current implemenations use userspace-libraries. In userspace you e.g.
> > > > can't
> > > > easily protect the uniquness of a UUID against other running
> > > > _processes_.
On Tue, Nov 20, 2007 at 10:59:58PM +0100, Helge Deller wrote:
> > Even with a futex? Or userspace atomics?
>
> Yes, you'll need a futex or similiar.
>
> The problem is then more, where will you put that futex to be able
> to protect against other processes ?
>
> Best solution is probably shared
David Schwartz wrote:
> Any UUID generator that can produce duplicate UUIDs with probability
> significantly less than purely random UUIDs is so badly broken that it
> should not ever be used. Anyone who finds such a UUID generator should
> immediately either fix it or throw it on the junk heap.
On Tue, Nov 20, 2007 at 10:59:58PM +0100, Helge Deller wrote:
> > > Current implemenations use userspace-libraries. In userspace you e.g.
> > > can't
> > > easily protect the uniquness of a UUID against other running _processes_.
> > > If you try do, you'll need to do locking e.g. with shared
On Tuesday 20 November 2007, Andrew Morton wrote:
> On Sun, 18 Nov 2007 20:38:21 +0100 Helge Deller <[EMAIL PROTECTED]> wrote:
>
> > Andrew,
> >
> > could you please consider adding this patch to your 2.6.25 patch series?
>
> please cc netdev on networking-related things
Ok.
> > This is the
On Tuesday 20 November 2007, Matt Mackall wrote:
> On Sun, Nov 18, 2007 at 10:40:34PM +0100, Helge Deller wrote:
> > On Sunday 18 November 2007, Andrew Morton wrote:
> > > On Sun, 18 Nov 2007 20:38:21 +0100 Helge Deller <[EMAIL PROTECTED]> wrote:
> > >
> > > > Title: Add time-based RFC 4122 UUID
On Tuesday 20 November 2007, Matt Mackall wrote:
On Sun, Nov 18, 2007 at 10:40:34PM +0100, Helge Deller wrote:
On Sunday 18 November 2007, Andrew Morton wrote:
On Sun, 18 Nov 2007 20:38:21 +0100 Helge Deller [EMAIL PROTECTED] wrote:
Title: Add time-based RFC 4122 UUID generator
On Tuesday 20 November 2007, Andrew Morton wrote:
On Sun, 18 Nov 2007 20:38:21 +0100 Helge Deller [EMAIL PROTECTED] wrote:
Andrew,
could you please consider adding this patch to your 2.6.25 patch series?
please cc netdev on networking-related things
Ok.
This is the third version
David Schwartz wrote:
Any UUID generator that can produce duplicate UUIDs with probability
significantly less than purely random UUIDs is so badly broken that it
should not ever be used. Anyone who finds such a UUID generator should
immediately either fix it or throw it on the junk heap.
On Tue, Nov 20, 2007 at 10:59:58PM +0100, Helge Deller wrote:
Even with a futex? Or userspace atomics?
Yes, you'll need a futex or similiar.
The problem is then more, where will you put that futex to be able
to protect against other processes ?
Best solution is probably shared memory,
On Tue, Nov 20, 2007 at 10:59:58PM +0100, Helge Deller wrote:
Current implemenations use userspace-libraries. In userspace you e.g.
can't
easily protect the uniquness of a UUID against other running _processes_.
If you try do, you'll need to do locking e.g. with shared memory, which
On Tuesday 20 November 2007, Matt Mackall wrote:
On Tue, Nov 20, 2007 at 10:59:58PM +0100, Helge Deller wrote:
Current implemenations use userspace-libraries. In userspace you e.g.
can't
easily protect the uniquness of a UUID against other running
_processes_.
If you try
On Wednesday 21 November 2007, Theodore Tso wrote:
On Tue, Nov 20, 2007 at 10:59:58PM +0100, Helge Deller wrote:
Even with a futex? Or userspace atomics?
Yes, you'll need a futex or similiar.
The problem is then more, where will you put that futex to be able
to protect against
On Wed, Nov 21, 2007 at 12:11:57AM +0100, Helge Deller wrote:
On Tuesday 20 November 2007, Matt Mackall wrote:
On Tue, Nov 20, 2007 at 10:59:58PM +0100, Helge Deller wrote:
Current implemenations use userspace-libraries. In userspace you e.g.
can't
easily protect the uniquness
On Tue, 20 Nov 2007 23:58:38 +0100
Helge Deller [EMAIL PROTECTED] wrote:
David Schwartz wrote:
Any UUID generator that can produce duplicate UUIDs with probability
significantly less than purely random UUIDs is so badly broken that it
should not ever be used. Anyone who finds such a UUID
David Schwartz wrote:
Any UUID generator that can produce duplicate UUIDs with probability
significantly less than purely random UUIDs is so badly broken that it
should not ever be used. Anyone who finds such a UUID generator should
immediately either fix it or throw it on the junk heap. Anyone
On Sun, Nov 18, 2007 at 10:40:34PM +0100, Helge Deller wrote:
> On Sunday 18 November 2007, Andrew Morton wrote:
> > On Sun, 18 Nov 2007 20:38:21 +0100 Helge Deller <[EMAIL PROTECTED]> wrote:
> >
> > > Title: Add time-based RFC 4122 UUID generator
> > >
> > > The current Linux kernel currently
On Sun, 18 Nov 2007 20:38:21 +0100 Helge Deller <[EMAIL PROTECTED]> wrote:
> Andrew,
>
> could you please consider adding this patch to your 2.6.25 patch series?
please cc netdev on networking-related things
> This is the third version of the patch in which I cleaned up and fixed quite
> some
> Any UUID generator that can produce duplicate UUIDs with probability
> significantly less than purely random UUIDs is so badly broken that it
> should not ever be used. Anyone who finds such a UUID generator should
> immediately either fix it or throw it on the junk heap. Anyone who knowingly
>
> > I use libuuid and I assume libuuid uses some uuid generator support
> > from the kernel.
>
> No, it does not. It's pure userspace and may produce double UUIDs.
>
> > libuuid comes from a package that Ted's maintain IIRC.
> >
> > I (my company) use uuid to uniquely identify objects in a
I use libuuid and I assume libuuid uses some uuid generator support
from the kernel.
No, it does not. It's pure userspace and may produce double UUIDs.
libuuid comes from a package that Ted's maintain IIRC.
I (my company) use uuid to uniquely identify objects in a distributed
Any UUID generator that can produce duplicate UUIDs with probability
significantly less than purely random UUIDs is so badly broken that it
should not ever be used. Anyone who finds such a UUID generator should
immediately either fix it or throw it on the junk heap. Anyone who knowingly
uses
On Sun, Nov 18, 2007 at 10:40:34PM +0100, Helge Deller wrote:
On Sunday 18 November 2007, Andrew Morton wrote:
On Sun, 18 Nov 2007 20:38:21 +0100 Helge Deller [EMAIL PROTECTED] wrote:
Title: Add time-based RFC 4122 UUID generator
The current Linux kernel currently contains the
On Sun, 18 Nov 2007 20:38:21 +0100 Helge Deller [EMAIL PROTECTED] wrote:
Andrew,
could you please consider adding this patch to your 2.6.25 patch series?
please cc netdev on networking-related things
This is the third version of the patch in which I cleaned up and fixed quite
some stuff
David Schwartz wrote:
Any UUID generator that can produce duplicate UUIDs with probability
significantly less than purely random UUIDs is so badly broken that it
should not ever be used. Anyone who finds such a UUID generator should
immediately either fix it or throw it on the junk heap. Anyone
Sam Ravnborg wrote:
> On Sun, Nov 18, 2007 at 01:05:03PM -0800, Andrew Morton wrote:
>> On Sun, 18 Nov 2007 20:38:21 +0100 Helge Deller <[EMAIL PROTECTED]> wrote:
>>
>> > Title: Add time-based RFC 4122 UUID generator
>> >
>> > The current Linux kernel currently contains the
On Sunday 18 November 2007, Andrew Morton wrote:
> On Sun, 18 Nov 2007 20:38:21 +0100 Helge Deller <[EMAIL PROTECTED]> wrote:
>
> > Title: Add time-based RFC 4122 UUID generator
> >
> > The current Linux kernel currently contains the generate_random_uuid()
> > function, which creates - based on
On Sun, Nov 18, 2007 at 01:05:03PM -0800, Andrew Morton wrote:
> On Sun, 18 Nov 2007 20:38:21 +0100 Helge Deller <[EMAIL PROTECTED]> wrote:
>
> > Title: Add time-based RFC 4122 UUID generator
> >
> > The current Linux kernel currently contains the generate_random_uuid()
> > function, which
On Sun, 18 Nov 2007 20:38:21 +0100 Helge Deller <[EMAIL PROTECTED]> wrote:
> Title: Add time-based RFC 4122 UUID generator
>
> The current Linux kernel currently contains the generate_random_uuid()
> function, which creates - based on RFC 4122 - truly random UUIDs and
> provides them to
On Sun, 18 Nov 2007 20:38:21 +0100 Helge Deller [EMAIL PROTECTED] wrote:
Title: Add time-based RFC 4122 UUID generator
The current Linux kernel currently contains the generate_random_uuid()
function, which creates - based on RFC 4122 - truly random UUIDs and
provides them to userspace
On Sun, Nov 18, 2007 at 01:05:03PM -0800, Andrew Morton wrote:
On Sun, 18 Nov 2007 20:38:21 +0100 Helge Deller [EMAIL PROTECTED] wrote:
Title: Add time-based RFC 4122 UUID generator
The current Linux kernel currently contains the generate_random_uuid()
function, which creates - based
On Sunday 18 November 2007, Andrew Morton wrote:
On Sun, 18 Nov 2007 20:38:21 +0100 Helge Deller [EMAIL PROTECTED] wrote:
Title: Add time-based RFC 4122 UUID generator
The current Linux kernel currently contains the generate_random_uuid()
function, which creates - based on RFC 4122 -
Sam Ravnborg wrote:
On Sun, Nov 18, 2007 at 01:05:03PM -0800, Andrew Morton wrote:
On Sun, 18 Nov 2007 20:38:21 +0100 Helge Deller [EMAIL PROTECTED] wrote:
Title: Add time-based RFC 4122 UUID generator
The current Linux kernel currently contains the generate_random_uuid()
function,
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