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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.
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Add UDEV_LOG to the man udev man page. Remove mention of specific
variables from the udevd/udevsend man page as we changed to pass
the whole environment.
Correct printed Usage: of udevtest and udevinfo.
Init the config in udevtest earlier to accept input with and without
the sysfs mount point.
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On Mon, Jul 12, 2004 at 11:14:28AM -0400, esr@thyrsus.com wrote:
> This is automatically generated email about problems in a man page for which
> you appear to be responsible. If you are not the right person or list, tell
> me and I will attempt to correct my database.
>
> See http://catb.org/~esr/doclifter/problems.html for details on how and
> why these patches were generated. Feel free to email me with any questions.
>
> Note: This patch does not change the mod date of the manual page. You
> may wish to do that by hand.
>
> Problems with udevd.8:
>
> 1. There are multiple name lines. This makes it impossible to translate
> the page to DocBook. It may also confuse some implementations
> of man -k.
>
> --- udevd.8-orig 2004-07-10 06:35:12.032545856 -0400
> +++ udevd.8 2004-07-10 06:36:19.301319448 -0400
> @@ -1,8 +1,6 @@
> .TH UDEVD 8 "February 2004" "" "Linux Administrator's Manual"
> .SH NAME
> -udevd \- udev event serializer daemon
> -.br
> -udevsend \- sends the event to udevd
> +udevd, udevdsend \- udev event serializer daemon and udev event sender
> .SH SYNOPSIS
> --
> Eric S. Raymond
>
Thanks Eric, udevsend.8 is only a symlink to udevd.8, so I attached a
stripped down patch to this mail.
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I have a very slow Bluetooth adapter hotplug event call, so we need
to increase the event timeout to something larger than 6 seconds.
Apr 1 02:54:08 pim udevsend[12119]: main: DEVPATH = '/class/tty/ttyUB0'
Apr 1 02:54:08 pim udevsend[12119]: main: SEQNUM = '340'
Apr 1 02:54:08 pim udevsend[12120]: main: DEVPATH = '/devices/pci0000:00/0000:00:1d.2/usb4/4-1'
Apr 1 02:54:08 pim udevsend[12120]: main: SEQNUM = '344'
Apr 1 02:54:09 pim udevsend[12133]: main: DEVPATH = '/devices/pci0000:00/0000:00:1d.2/usb4/4-1/4-1:1.1'
Apr 1 02:54:09 pim udevsend[12133]: main: SEQNUM = '342'
Apr 1 02:54:10 pim udevsend[12136]: main: DEVPATH = '/devices/pci0000:00/0000:00:1d.2/usb4/4-1/4-1:1.2'
Apr 1 02:54:10 pim udevsend[12136]: main: SEQNUM = '343'
Apr 1 02:54:13 pim udevsend[12141]: main: DEVPATH = '/devices/pci0000:00/0000:00:1d.2/usb4/4-1/4-1:1.0'
Apr 1 02:54:13 pim udevsend[12141]: main: SEQNUM = '341'
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Based on a an original patch from Olaf Hering <olh@suse.de>
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Thanks to Christian Gierke, he sent me a beauty patch for our man pages.
Some typos are fixed and a few word are clarified.
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Hey it's not longer the "goal" to provide a dynamic dev directory,
we have just arrived. So I change it to more self-confident words :)
I've also added the completly missing environment variables to the
man pages.
To stop the misuse of the PROGRAM= call paramenters, we better mention
its limitations.
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Nice, here is the corresponding man update which also removes the
mention of the limitation of getgrname() and friends with klibc.
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Add the new %s{filename} to the udev man page.
And add the automatic start of udevd to the udevd man page.
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Here is the missing man page for udevd/udevsend.
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