Re: [RFC 0/6] Backing Store for sysfs

[Maneesh Soni <maneesh@in.ibm.com>]

On Mon, Oct 06, 2003 at 06:42:29PM +0000, Greg KH wrote:
> On Mon, Oct 06, 2003 at 11:23:53AM -0700, Kevin P. Fleming wrote:
> > Greg KH wrote:
> > 
> > >The hotplug event points to the sysfs location of the kobject, that's
> > >all.  libsysfs then takes that kobject location and sucks up all of the
> > >attribute information for that kobject, which udev then uses to
> > >determine what it should do.
> > 
> > This sounds like a very different issue than what I thought you said 
> > originally. Your other message said a "find over the sysfs tree", 
> > implying some sort of tree-wide search for relevant information. In 
> > fact, the "find" is only for attributes in the directory owned by the 
> > kobject, right? Once they have been "found", they will age out of the 
> > dentry/inode cache just like any other search results.
> 
> They might, depending on the patch implementation.  And no, the issue
> isn't different, as we have to show the memory usage after all kobjects
> are accessed in sysfs from userspace, not just before, like some of the
> measurements are, in order to try to compare apples to apples.
> 

Well Greg, the aim of the patch is to save memory when the kobject is not
in use. I don't think it is a good idea to buy the same thing in  
600 bytes of RAM which is available for just 100 bytes.

I trying one more version which should not put any or minimum load on kobject 
when it is not in sysfs.

-- 
Maneesh Soni
Linux Technology Center, 
IBM Software Lab, Bangalore, India
email: maneesh@in.ibm.com
Phone: 91-80-5044999 Fax: 91-80-5268553
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