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https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=142713
/sbin/udevstart segfaults on an ATIIXP chipset which is not supported
well by the kernel yet. There, /proc/ide/hda/media can not be read
(EIO error) and udevstart seems to give a null-pointer to an SELinux
function checking the media-type.
A hour wrap during the test run does not work :) Just remove
all the useless date conversions as we are only interested in the
seconds it takes to process.
[root@pim udevd-test]# ./udevd-test.pl 9
...
device: /class/tty/console, action: remove
forking udev time: Sat Dec 11 18:59:57 2004
the delay time is: 3 s
device: /class/tty/ptmx, action: remove
forking udev time: Sat Dec 11 19:00:07 2004
the delay time is: 4013 s
the delay time is: 4013
udevd doesn't act properly.
On Sat, 2004-12-11 at 18:44 +0200, Martin Schlemmer [c] wrote:
>
> Any suggestions to determining the version of the installed udev?
> This is now during startup, to see if we can make use of using
> udevsend as hotplug agent. If the system was up, udevinfo could
> be used, but that is in /usr/bin that might be on a seperate /usr.
> I know we might move udevinfo to /bin, but that might be an issue
> for some, and adding a -V switch to /sbin/udev might be a better
> choice.
I've found a /dev/video4linux node and just realized, that libsysfs
searches all subdirs for an attribute name.
So it found /class/video4linux/video0/dev for the videodev class
creation event /class/video4linux and created a node.
Just ignore the SUBSYSTEM="class" events now.
Currently udevd delays only events for the same DEVPATH.
Example of an "add" event sequence:
/block/sda
/block/sda/sda1
With this change, we make sure, that the udev process handling
/block/sda has finished its work (waited for all attributes,
created the node) before we fork the udev event for /block/sda/sda1.
This way the event for sda1 can be sure, that the node for the
main device is already created (may be useful for disk labels).
It will not affect any parallel device handling, only the sequence
of the devices directory chain is serialized. The 10.000 disks
plugged in will still run as parallel events. :)
The main motivation to do this is the program execution of the
dev.d/ and hotplug.d/ directory. If we don't wait for the parent
event to exit, we can't be sure that the executed scripts are
run in the right order.
On Thu, Dec 09, 2004 at 09:18:28AM +0100, Kay Sievers wrote:
> On Wed, 2004-12-08 at 19:07 -0800, David Brownell wrote:
> > Could that argument apply to the underlying hardware, too?
> We now make sure that the sequence of events for a device
> is serialized for every device chain and the class/block
> devices which have a "device" link to a physical device are
> handled after the physical device is fully populated and
> notified to userspace. It will only work this way on kernels
> later than 2.6.10-rc1 cause it depends on the PHYSDEVPATH
> value in the hotplug environment.
Thanks-To: Tobias Klauser <tklauser@access.unizh.ch>
While crawling through the udev manpage I noticed some typos and other
grammatical errors. English is not my native language, so I'm not sure
if I fixed everything right. I would be glad if any English-speaking
person could check this patch before applying.
Initialize the defaults in udev_config.c instead of namedev.c.
Replace macro by expanded code. Switch to mode_t instead
of string value. Add and clarify some comments.
Remove udev.bus, cause it's currently unused and newer kernels will pass
it in the hotplug environment as PHYSDEVBUS.
Remove udev.action, cause it's unused.
Rename udev_set_values() to udev_init_device().
