AFAIK, BKL is no more useful. p.s. http://www.internetnews.com/skerner/2010/11/linux-2637-kills-the-big-kerne.h...  so, you can ignore it. However, if you are interested to know its details, go thro' http://lwn.net/Articles/86859/ Date: Thu, 29 Dec 2011 14:33:42 +0530 From: sandeep kumar <coolsandyforyou@gmail.com> Subject: What is Big Kernel Lock? To: kernelnewbies@kernelnewbies.org Message-ID:     <CAL7WMDdSFA37iOgqo8LC+JLM05uMK-VhNkxPdUqDiCjKCypdiQ@mail.gmail.com> Content-Type: text/plain; charset="iso-8859-1" Hi All, Can any one tell me the significance of BKL? -- With regards, Sandeep Kumar Anantapalli,