On Fri, 20 Apr 2018 22:08:27 +0200 Mathieu Malaterre <malat@xxxxxxxxxx> wrote: > On Fri, Apr 20, 2018 at 12:41 PM, Nicholas Piggin <npiggin@xxxxxxxxx> wrote: > > On Fri, 20 Apr 2018 12:00:49 +0200 > > Mathieu Malaterre <malat@xxxxxxxxxx> wrote: > > > >> On Fri, Apr 20, 2018 at 9:34 AM, Nicholas Piggin <npiggin@xxxxxxxxx> wrote: > >> > This requires further changes to linker script to KEEP some tables > >> > and wildcard compiler generated sections into the right place. This > >> > includes pp32 modifications from Christophe Leroy. > >> > > >> > When compiling powernv_defconfig with this option: > >> > > >> > text data bss dec filename > >> > 11827621 4810490 1341080 17979191 vmlinux > >> > 11752437 4598858 1338776 17690071 vmlinux.dcde > >> > > >> > Resulting kernel is almost 400kB smaller (and still boots). > >> > > >> > [ppc32 numbers here] > >> > >> ^^^ > >> > >> Do you want somebody else to provide those numbers ? > > > > If you have a booting kernel, yes some more numbers would be good. > > I've used /boot/config-4.15.0-2-powerpc from my current debian > package. Rebuild master with and without option, boot ok, load/unload > module ok. > > $ size nick/vmlinux.with* > text data bss dec hex filename > 7386425 2364370 1425432 11176227 aa8923 nick/vmlinux.with > 7461457 2475122 1428064 11364643 ad6923 nick/vmlinux.without > > This is not clear why with option the size of kernel is slightly bigger: > > $ du -sk nick/vmlinux.with* > 124488 nick/vmlinux.with > 124004 nick/vmlinux.without Not sure. readelf -S vmlinux may show something. To really get lots of detail, you can add to the top level Makefile: LDFLAGS_vmlinux += -M Then it will print the link map for you and other details. Actually it will output several times because we link vmlinux 2-3 times, so just take the last one. There is a lot of data there. -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
