Re: inconsistent renaming of devices

[Greg KH <greg@kroah.com>]

On Thu, Feb 05, 2004 at 03:29:41PM +0530, Surekha.PC wrote:
> 
> 
> >What do you see happening in your system?
> >If you build with DEBUG=true USE_LOG=true what does the debug syslog
> show for these 
> >devices?
> 
> It seems the user<->kernel race still persists.
> 
> During device addition randomly few device/partition entries are not
> getting created. If debug is enabled all devices are created. With debug
> turned off, only few of them are created. So in this case I am not able
> to capture debug for devices not getting created.  
> 
> Again device removal is also having the similar inconsistent behaviour.
> Irrespective of debug being on/off few stale device entries are retained
> under /udev.
> 
> In this scenario I could see some debug messages as below.
> 
> Looks like the sysfs entries for the device are removed long before udev
> lookup.

What kind of block device is this?  

> ------------------------------------------------------------------------
> -----------------
> udev_hotplug: looking at '/block/sdc'
> udev_hotplug: looking at '/block/sde/sde2
> udev_hotplug: looking at '/block/sde/sde3
> get_dirs: sysfs_path='/sys'
> udev_hotplug: don't care about 'scsi_device' devices
> .....
> namedev_init_rules: reading '/etc/udev/udev.rules' as rules file
> .....
> udev_hotplug: looking at '/block/sdc/sdc3
> udev_hotplug: don't care about 'scsi_device' devices
> udev_remove_device: name is 'iscsib0t38l0sd3'
> ......
> udev_remove_device: '/class/scsi_device/40:0:38:1' not found in
> database, falling back on default name
> ------------------------------------------------------------------------
> ------------------
> 
> In the above debug messages, I could observe the first few hotplug
> events for device removal are not getting passed to
> udev_remove_device(). This results in those device entries not getting
> removed.

How are we dropping events?  Are you using the udevsend/udevd/udev
situation, or just udev?  I don't see how we could drop events just
using udev alone.

> Let me know if you need more information from the debug log, I will send
> it to you.

Please do.  Along with annotation of what is going on.

thanks,

greg k-h


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