On Tue, May 18, 2010 at 12:27:05AM -0700, Dave Hansen wrote: > On Tue, 2010-05-18 at 13:41 +0800, Shaohui Zheng wrote: > > On Thu, May 13, 2010 at 11:49:38AM -0700, Dave Hansen wrote: > > the configfs was introduced in 2005, you can refer to http://lwn.net/Articles/148973/. > > > > I enabled the configfs, and I see that the configfs is not so popular as we expected, > > I mount configfs to /sys/kernel/config, I get an empty directory. It means that nobody is > > using this file system, it is an interesting thing, is it means that configfs is deprecated? > > If so, it might not be nessarry to develop a configfs interface for hotplug. > > Uh, deprecated? What would make you think that? It does look like the > users are a we bit obscure, but that's a bit far from deprecated. > > > Dave & Greg, > > Can you provide an exmample to use configfs as interface in Linux kernel, I want to get > > a live demo, thanks. > > Heh. There are some great tools out there called cscope and grep. I > have them on my system and I bet you can get them on yours too. > > That said, you're right. There don't seem to be a ton of users of it > these days. But, the LWN article you referenced also pointed to at > least one user. So, please try and put a wee bit of effort into it. I am trying to put a few efforts on it, and we hope to support both sysfs and configfs. because of the history reason, sysfs is more popular. I bet that only vew few users know configfs, so sysfs is still the prefered way. > > Maybe configfs isn't the way to go. I just think extending the 'probe' > file is a bad idea, especially in the way your patch did it. I'm open > to other alternatives. Since this is only for testing, perhaps debugfs > applies better. What other alternatives have you explored? How about a > Systemtap set to do it? :) > > -- Dave Did not try other alternatives until now. Thanks for Dave's suggestions, Systemtap and debugfs seems to be good methods, too. -- Thanks & Regards, Shaohui -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>