On Tue, Dec 2, 2014 at 10:37 AM, Raghavendra <arrao@xxxxxxx> wrote: > Hello Tinti, > > Thank you for the reply. > > On Tuesday 02 December 2014 05:21 PM, Vinícius Tinti wrote: >> >> 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? > > Actually, I haven't use any optimization flags. I've just hit 'make' from > the command line while compiling for both the kernels. I even checked the > Makefile of both the kernels. -O2 flag is used in the same way in both the > Makefiles. Strange. Can you try this? > Regards, > Raghavendra > >> >> 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 > > > > ------------------------------------------------------------------------------------------------------------------------------- > [ 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. > ------------------------------------------------------------------------------------------------------------------------------- > -- Simplicity is the ultimate sophistication _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
