On Fri, Jun 18, 2010 at 11:16:29PM +0530, Prashant Shah wrote: > Hi, > > Below is a small module that I was trying out (code at the end of message) > > This module creates a file called /proc/jiffies that adds a message to > the log file using printk and shows the current jiffies value to the > user when it is read. > > If I cat the /proc/jiffies file once, in the dmesg log there are three > entries. The function create_proc_read_entry() is calling the > my_proc_read() thrice. > > o/p : > [ 997.261195] ******** Reading jiffies files ********* > [ 997.261205] ******** Reading jiffies files ********* > [ 997.261233] ******** Reading jiffies files ********* Try running 'strace cat /proc/jiffies'. I wouldn't be surprised if cat is reading the file more than once. -- Matthew Wilcox Intel Open Source Technology Centre "Bill, look, we understand that you're interested in selling us this operating system, but compare it to ours. We can't possibly take such a retrograde step." -- To unsubscribe from this list: send the line "unsubscribe kernel-janitors" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
