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From: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
To: linux-hotplug@vger.kernel.org
Subject: rules: avoid traversing parent of every single device?
Date: Fri, 22 May 2009 14:15:33 +0000	[thread overview]
Message-ID: <4A16B385.7000700@tuffmail.co.uk> (raw)

Hi,

I've been looking at what is responsible for all the path lookup 
activity in coldplug.  On my debian stable system, it looks like every 
device gets its parent looked up in sysfs.  I think this is due to 
SUBSYSTEMS matches.

I see the udev default rules are different, but it looks like they still 
test for SUBSYSTEMS on every single device:

SUBSYSTEMS="scsi", ATTRS{type}="1|8", GROUP="tape"
SUBSYSTEMS="scsi", ATTRS{type}="4|5", GROUP="cdrom"
SUBSYSTEMS="scsi", ATTRS{type}="0", GROUP="disk"


Should we add SUBSYSTEM="scsi_generic" to these three rules?

Thanks
Alan

             reply	other threads:[~2009-05-22 14:15 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-05-22 14:15 Alan Jenkins [this message]
2009-05-22 14:26 ` rules: avoid traversing parent of every single device? Kay Sievers
2009-05-22 14:33 ` Alan Jenkins
2009-05-22 14:37 ` Kay Sievers
2009-05-22 14:42 ` Alan Jenkins
2009-05-22 14:47 ` Kay Sievers

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