From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?ISO-8859-1?Q?Mika_Penttil=E4?= Date: Wed, 07 Jan 2004 19:31:13 +0000 Subject: Re: removable media revalidation - udev vs. devfs or static /dev Message-Id: <3FFC5E81.60108@kolumbus.fi> List-Id: References: <200401012333.04930.arvidjaar@mail.ru> <20040103055847.GC5306@kroah.com> <20040107185656.GB31827@kroah.com> <3FFC5CBB.5050507@kolumbus.fi> <20040107192434.GA823@kroah.com> In-Reply-To: <20040107192434.GA823@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable To: Greg KH Cc: Linus Torvalds , Andrey Borzenkov , linux-hotplug-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org Greg KH wrote: >On Wed, Jan 07, 2004 at 09:23:39PM +0200, Mika Penttil=E4 wrote: > =20 > >>Greg KH wrote: >> =20 >> >>>On Wed, Jan 07, 2004 at 10:38:31AM -0800, Linus Torvalds wrote: >>> =20 >>> >>>>And it really has to create _all_ of them, exactly because there's no w= ay >>>>to know ahead-of-time which of them will be available. >>>> >>>>Then, user space can just access "/dev/sda1" or whatever, and the act o= f=20 >>>>accessing it will force the re-scan. >>>> =20 >>>> >>>> =20 >>>> >>>Hm, that would work, but what about a user program that just polls on >>>the device, as the rest of this thread discusses? As removable devices >>>are not the "norm" it would seem a bit of overkill to create 16 >>>partitions for every block device, if they need them or not. >>> >>> =20 >>> >>Accessing the partition would not cause the rescan (accessing the whole=20 >>disk causes.) I think devfs does/did this rescan on access. >> =20 >> > >It would rescan on access of a partition or the main block device? > >If accessing the partition doesn't work, than having udev create all >partitions wouldn't help anything :( > >thanks, > >greg k-h > =20 > Right, rescan on access of main block device works, partition not, afaics. --Mika ------------------------------------------------------- This SF.net email is sponsored by: Perforce Software. Perforce is the Fast Software Configuration Management System offering advanced branching capabilities and atomic changes on 50+ platforms. Free Eval! http://www.perforce.com/perforce/loadprog.html _______________________________________________ Linux-hotplug-devel mailing list http://linux-hotplug.sourceforge.net Linux-hotplug-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-hotplug-devel