jiffies doesn't increase while doing mdelay() ?

["James Yu" <cyu021@xxxxxxxxx>]

Dear all,

I am doing the following in a kernel thread :

===== code segment=====
prink("before mdelay:%d, ", jiffies);
mdelay(300); // delay 300ms
printk("after mdelay:%d\n", jiffies);
===== code segment=====

However, jiffies before and after doing mdelay are the same!!!
Can someone please explain why jiffies doesn't change ?

Cheers,
--
James
cyu021@xxxxxxxxx

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