Hi all, Sorry for my mistake that my previous patch series has been screwed up. So I regenerate a third version and also set up a git tree at: git://github.com/jiangliu/linux.git mem_init Any help to review and test are welcomed! The original goal of this patchset is to fix the bug reported by https://bugzilla.kernel.org/show_bug.cgi?id=53501 Now it has also been expanded to reduce common code used by memory initializion. This is the last part, previous three patch sets could be accessed at: http://marc.info/?l=linux-mm&m=136289696323825&w=2 http://marc.info/?l=linux-mm&m=136290291524901&w=2 http://marc.info/?l=linux-mm&m=136345342831592&w=2 This patchset applies to https://git.kernel.org/pub/scm/linux/kernel/git/mhocko/mm.git since-3.8 Patch 1-7: 1) add comments for global variables exported by vmlinux.lds 2) normalize global variables exported by vmlinux.lds Patch 8: Introduce helper functions mem_init_print_info() and get_num_physpages() Patch 9: Avoid using num_physpages at runtime Patch 10-38: 1) Simplify mem_init() by using mem_init_print_info() 2) Prepare fore kill global variable num_physpages Patch 39: Kill global variable num_physpages With all patches applied, mem_init(), free_initmem(), free_initrd_mem() could be as simple as below. This patch series has reduced about 1.2K lines of code in total. #ifndef CONFIG_DISCONTIGMEM void __init mem_init(void) { max_mapnr = max_low_pfn; free_all_bootmem(); high_memory = (void *) __va(max_low_pfn * PAGE_SIZE); mem_init_print_info(NULL); } #endif /* CONFIG_DISCONTIGMEM */ void free_initmem(void) { free_initmem_default(-1); } #ifdef CONFIG_BLK_DEV_INITRD void free_initrd_mem(unsigned long start, unsigned long end) { free_reserved_area(start, end, -1, "initrd"); } #endif Due to hardware resource limitations, I have only tested this on x86_64. And the messages reported are: Previous log message: Memory: 7745676k/8910848k available (6934k kernel code, 836024k absent, 329148k reserved, 6343k data, 1012k init) Current log message: Memory: 7744624K/8074824K available (6969K kernel code, 1011K data, 2828K rodata, 1016K init, 9640K bss, 330200K reserved) Any help to review or test these patch series are welcomed! Regards! Gerry Jiang Liu (39): vmlinux.lds: add comments for global variables and clean up useless declarations avr32: normalize global variables exported by vmlinux.lds c6x: normalize global variables exported by vmlinux.lds h8300: normalize global variables exported by vmlinux.lds score: normalize global variables exported by vmlinux.lds tile: normalize global variables exported by vmlinux.lds UML: normalize global variables exported by vmlinux.lds mm: introduce helper function mem_init_print_info() to simplify mem_init() mm: use totalram_pages instead of num_physpages at runtime mm/alpha: prepare for removing num_physpages and simplify mem_init() mm/ARM: prepare for removing num_physpages and simplify mem_init() mm/ARM64: prepare for removing num_physpages and simplify mem_init() mm/AVR32: prepare for removing num_physpages and simplify mem_init() mm/blackfin: prepare for removing num_physpages and simplify mem_init() mm/c6x: prepare for removing num_physpages and simplify mem_init() mm/cris: prepare for removing num_physpages and simplify mem_init() mm/frv: prepare for removing num_physpages and simplify mem_init() mm/h8300: prepare for removing num_physpages and simplify mem_init() mm/hexagon: prepare for removing num_physpages and simplify mem_init() mm/IA64: prepare for removing num_physpages and simplify mem_init() mm/m32r: prepare for removing num_physpages and simplify mem_init() mm/m68k: prepare for removing num_physpages and simplify mem_init() mm/microblaze: prepare for removing num_physpages and simplify mem_init() mm/MIPS: prepare for removing num_physpages and simplify mem_init() mm/mn10300: prepare for removing num_physpages and simplify mem_init() mm/openrisc: prepare for removing num_physpages and simplify mem_init() mm/PARISC: prepare for removing num_physpages and simplify mem_init() mm/ppc: prepare for removing num_physpages and simplify mem_init() mm/s390: prepare for removing num_physpages and simplify mem_init() mm/score: prepare for removing num_physpages and simplify mem_init() mm/SH: prepare for removing num_physpages and simplify mem_init() mm/SPARC: prepare for removing num_physpages and simplify mem_init() mm/tile: prepare for removing num_physpages and simplify mem_init() mm/um: prepare for removing num_physpages and simplify mem_init() mm/unicore32: prepare for removing num_physpages and simplify mem_init() mm/x86: prepare for removing num_physpages and simplify mem_init() mm/xtensa: prepare for removing num_physpages and simplify mem_init() mm/hotplug: prepare for removing num_physpages mm: kill global variable num_physpages arch/alpha/mm/init.c | 32 ++------------------- arch/alpha/mm/numa.c | 34 ++++------------------ arch/arm/mm/init.c | 47 ++---------------------------- arch/arm64/mm/init.c | 48 ++----------------------------- arch/avr32/kernel/setup.c | 2 +- arch/avr32/kernel/vmlinux.lds.S | 4 +-- arch/avr32/mm/init.c | 29 +++---------------- arch/blackfin/mm/init.c | 38 ++++--------------------- arch/c6x/kernel/vmlinux.lds.S | 4 +-- arch/c6x/mm/init.c | 11 +------ arch/cris/mm/init.c | 33 ++------------------- arch/frv/kernel/setup.c | 14 ++++----- arch/frv/mm/init.c | 49 +++++++++---------------------- arch/h8300/boot/compressed/misc.c | 1 - arch/h8300/kernel/vmlinux.lds.S | 2 ++ arch/h8300/mm/init.c | 34 ++++++---------------- arch/hexagon/mm/init.c | 3 +- arch/ia64/mm/contig.c | 11 ------- arch/ia64/mm/discontig.c | 3 -- arch/ia64/mm/init.c | 27 +----------------- arch/m32r/mm/discontig.c | 6 +--- arch/m32r/mm/init.c | 49 ++++--------------------------- arch/m68k/mm/init.c | 31 ++------------------ arch/microblaze/mm/init.c | 51 ++++----------------------------- arch/mips/mm/init.c | 57 ++++++++++++------------------------- arch/mips/pci/pci-lantiq.c | 2 +- arch/mips/sgi-ip27/ip27-memory.c | 21 ++------------ arch/mn10300/mm/init.c | 26 ++--------------- arch/openrisc/mm/init.c | 44 +++------------------------- arch/parisc/mm/init.c | 46 ++---------------------------- arch/powerpc/mm/mem.c | 56 ++++++++---------------------------- arch/s390/mm/init.c | 17 ++--------- arch/score/kernel/vmlinux.lds.S | 1 + arch/score/mm/init.c | 26 ++--------------- arch/sh/mm/init.c | 25 +++------------- arch/sparc/kernel/leon_smp.c | 3 -- arch/sparc/mm/init_32.c | 33 ++------------------- arch/sparc/mm/init_64.c | 27 ++---------------- arch/tile/include/asm/sections.h | 2 +- arch/tile/kernel/setup.c | 20 ++++++------- arch/tile/kernel/vmlinux.lds.S | 4 ++- arch/tile/mm/init.c | 17 ++--------- arch/um/include/asm/common.lds.S | 1 - arch/um/kernel/dyn.lds.S | 6 ++-- arch/um/kernel/mem.c | 4 +-- arch/um/kernel/uml.lds.S | 7 +++-- arch/unicore32/mm/init.c | 49 ++----------------------------- arch/x86/kernel/cpu/amd.c | 2 +- arch/x86/kernel/setup.c | 2 -- arch/x86/mm/init_32.c | 30 ++----------------- arch/x86/mm/init_64.c | 20 +------------ arch/x86/mm/numa_32.c | 2 -- arch/xtensa/mm/init.c | 27 ++---------------- fs/fuse/inode.c | 2 +- include/asm-generic/sections.h | 21 +++++++++++++- include/linux/mm.h | 13 ++++++++- kernel/power/snapshot.c | 4 +-- mm/memory.c | 2 -- mm/memory_hotplug.c | 4 --- mm/nommu.c | 2 -- mm/page_alloc.c | 52 +++++++++++++++++++++++++++++++++ net/ipv4/inet_fragment.c | 2 +- 62 files changed, 256 insertions(+), 986 deletions(-) -- 1.7.9.5 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. 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