From mboxrd@z Thu Jan 1 00:00:00 1970 From: Xavier Bestel Date: Thu, 08 Jan 2004 08:00:41 +0000 Subject: Re: removable media revalidation - udev vs. devfs or static /dev Message-Id: <1073548840.6189.144.camel@nomade> List-Id: References: <200401012333.04930.arvidjaar@mail.ru> <20040103055847.GC5306@kroah.com> <20040108031357.A1396@pclin040.win.tue.nl> <20040108034906.A1409@pclin040.win.tue.nl> <20040108043506.A1555@pclin040.win.tue.nl> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable To: Linus Torvalds Cc: Andries Brouwer , Greg KH , Andrey Borzenkov , linux-hotplug-devel@lists.sourceforge.net, Linux Kernel Mailing List Le jeu 08/01/2004 =E0 04:43, Linus Torvalds a =E9crit : > On Thu, 8 Jan 2004, Andries Brouwer wrote: > >=20 > > I am even happy in a somewhat more general situation that you are. > > If the kernel autopartitions (and make recognition of new partitions > > hotplug events so that udev can create the device nodes), all is well. >=20 > Yes. We _could_ do that, by just making a "we noticed the disk change" be > a hotplug event. However, I'm loath to do that, because some devices > literally don't even have an easily read disk change signal, so what they > do is >=20 > - assume the disk _always_ changed on open > - do a quick IO to verify it >=20 > and I'd be nervous about that kind of thing resulting in hotplug being=20 > called constantly if somebody rude just has an endless loop of=20 > "open()/close()". Theses devices are kind of broken anyway, aren't they ? I see no safe way of handling disk changes on them, except having a "I changed disk in this drive" button on the desktop and rely on the user's good behavior. Currently the kernel will may have a wrong idea of what's in the drive if it doesn't poll, and that may wreak havoc. Xav ------------------------------------------------------- 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