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X-HELO:	calimero.vinschen.de
Date:	Fri, 10 Jun 2016 21:45:39 +0200
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: missing partitions under /dev
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On Jun 10 20:51, Corinna Vinschen wrote:
> On Jun 10 16:59, Aaron Schneider wrote:
> > > Date: Fri, 10 Jun 2016 12:00:27 +0200
> > > From: corinna-cygwin AT cygwin DOT com
> > >
> > > Cygwin's /dev/sd* emulation doesn't support more than 15 partitions y=
et.
> > > This would need some rework of the device naming code.
> > >
> > >
> > > Corinna
> >=20
> > I see. I though that it was a Windows problem that didn't provide
> > the partitions properly to cygwin if they weren't formatted with a
> > known filesystem or something related.=C2=A0
> >=20
> > Isn't any other way to access those partitions even from Windows=C2=A0
> > Powershell?
>=20
> There may be a way even using Cygwin.  If you know which disk X it is,
> you could try accessing it via /proc/sys/Device/HarddiskX/PartitionY.
> No guarantee but for raw access this might be sufficient.
>=20
> > Is the feature to support more than 15 partition planned
> > to=C2=A0be implemented?=20=09=09=20=09=20=20=20=09=09=20=20
>=20
> I looked into that and theoretically the changes are small.
>=20
> However, there's an undesired side-effect.  The device parser code uses
> an auto-generated minimally pruned 0-trie, created by a tool called
> shilka.  The problem is that the resulting object file is already very
> big, compared to the rest of the DLL.

> Amazing but true, about 20% of
> the object file is just this trie code and its data, whihc,

Uh, this sentence makes no sense.  Let's try again:

 Amazing but true, about 20% of the Cygwin DLL size is just this device
 parser code and its data, which...

> IMHO, is
> already quite bad.  By adding support for partitions 16-63, this object
> code gets 2.5 times bigger!
>=20
> This is way too much, and I think what we have to do first is to=20
> replace this autogenerated 0-trie code by some simpler, hand-written
> parser before we can consider adding support for more partitions.


Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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