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

[Greg KH]

On Mon, Oct 06, 2003 at 07:38:06PM +0200, Christian Borntraeger wrote:
> Greg KH wrote:
> 
> > On Mon, Oct 06, 2003 at 02:29:15PM +0530, Maneesh Soni wrote:
> >> 
> >> 2.6.0-test6          With patches.
> >> -----------------
> >> dentry_cache (active)                2520                    2544
> >> inode_cache (active)         1058                    1050
> >> LowFree                      875032 KB               874748 KB
> > 
> > So with these patches we actually eat up more LowFree if all sysfs
> > entries are searched, and make the dentry_cache bigger?  That's not good
> > :(
> [...]
> > information for that kobject.  So I don't see any savings in these
> > patches, do you?
> 
> I do. As stated earlier, with 20000 devices on a S390 guest I have around 
> 350MB slab memory after rebooting. 
> With this patch, the slab memory reduces to 60MB. 

That's good.  But what happens after you run a find over the sysfs tree?
Which is essencially what udev will be doing :)

thanks,

greg k-h
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