On Wed, Mar 08, 2006 at 02:13:30PM +0100, Jean Delvare wrote: > > The only data I am missing now is the memory used by each additional > sysfs file we create. We need to know, as Hans objected that too many > sysfs files could have a negative impact on memory consumption. I dug > down the sysfs code yeterday evening to find out, but didn't find what > I was looking for yet. I hope to get the answer this evening. sysfs files are very light. The "large" memory structures for a ram based file system are the dentry and inode structures. sysfs now creates them on the fly when they are needed, and if we have memory pressure on our internal kernel caches, they are freed. So in short, don't worry about creating new sysfs files, it's not an issue. The people running 20,000 disks on a 31bit s390 system have already done the hard work for you :) thanks, greg k-h
