Messages in this thread | | | Date | Mon, 6 Oct 2003 11:34:05 -0700 | From | Greg KH <> | Subject | Re: [RFC 0/6] Backing Store for sysfs |
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On Tue, Oct 07, 2003 at 12:01:32AM +0530, Dipankar Sarma wrote: > On Mon, Oct 06, 2003 at 11:09:07AM -0700, Greg KH wrote: > > On Mon, Oct 06, 2003 at 11:31:19PM +0530, Dipankar Sarma wrote: > > No. My main point is that for every hotplug event (which is caused by a > > kobject being created or destroyed), udev will run and look at the sysfs > > entry for the kobject (by using libsysfs which reads in all of the > > kobject information, including attributes). This is a normal event, so > > we have to care about what happens after running 'find' on the sysfs > > tree as that is basically what will always happen. > > > > Does that make more sense? We can't just look at what happens with this > > patch without actually accessing all of the sysfs tree, as that will be > > the "normal" case. > > That sounds odd. So, udev essentially results in a frequent and continuous > "find /sys" ? That doesn't sound good. You are unnecessarily adding > pressure on vfs (dcache specially). We will discuss this offline then > and see what needs to be done.
No, not a 'find', we look up the kobject that was added, and its attributes. Doing a 'find' will emulate this for your tests, that's all.
thanks,
greg k-h - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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