On Tue, Dec 2, 2014 at 7:08 AM, Raghavendra <arrao@xxxxxxx> wrote: > Hello all, > > I am using Ubuntu-12.04 which came with 3.2 kernel. Parallel to this, > I've compiled and installed 3.12.1 kernel using the Ubuntu-3.2's > configuration, and the compiler which came with the distro. I've noticed > that there is a huge difference in the size of the .ko file between the > Ubuntu's kernel and the kernel which I've compiled. Sample results are : > > $ du -sh usb-storage.ko > It shows : 56K for the Ubuntu's 3.2 kernel > 1.3M for the custom kernel that I've compiled > > I've tested the same thing for a simple hello world module : > $ du -sh hello.ko > It shows : 4.0k for the Ubuntu's 3.2 kernel > 56k for the custom kernel that I've compiled > > What could be the reason for this huge amount of difference of storage > space in spite of using the same config file and compiler? Are you sure that you have build with the same optimization flags? I guess that "-O2" is missing in the big example. Could you double check? Regards > Thanks in advance. > > Raghavendra > > ------------------------------------------------------------------------------------------------------------------------------- > [ C-DAC is on Social-Media too. Kindly follow us at: > Facebook: https://www.facebook.com/CDACINDIA & Twitter: @cdacindia ] > > This e-mail is for the sole use of the intended recipient(s) and may > contain confidential and privileged information. If you are not the > intended recipient, please contact the sender by reply e-mail and destroy > all copies and the original message. Any unauthorized review, use, > disclosure, dissemination, forwarding, printing or copying of this email > is strictly prohibited and appropriate legal action will be taken. > ------------------------------------------------------------------------------------------------------------------------------- > > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@xxxxxxxxxxxxxxxxx > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies -- Simplicity is the ultimate sophistication _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
