- 03 Jul, 2013 40 commits
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Jiang Liu authored
Prepare for removing num_physpages and simplify mem_init(). Signed-off-by:
Jiang Liu <jiang.liu@huawei.com> Cc: Jeff Dike <jdike@addtoit.com> Cc: Richard Weinberger <richard@nod.at> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Jiang Liu authored
Prepare for removing num_physpages and simplify mem_init(). Signed-off-by:
Chris Metcalf <cmetcalf@tilera.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Wen Congyang <wency@cn.fujitsu.com> Signed-off-by:
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Jiang Liu authored
Prepare for removing num_physpages and simplify mem_init(). Signed-off-by:
Sam Ravnborg <sam@ravnborg.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Cc: Tang Chen <tangchen@cn.fujitsu.com> Signed-off-by:
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Jiang Liu authored
Prepare for removing num_physpages and simplify mem_init(). Signed-off-by:
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Jiang Liu authored
Prepare for removing num_physpages and simplify mem_init(). Signed-off-by:
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Jiang Liu authored
Prepare for removing num_physpages and simplify mem_init(). Signed-off-by:
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Jiang Liu authored
Prepare for removing num_physpages and simplify mem_init(). Signed-off-by:
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Jiang Liu authored
Prepare for removing num_physpages and simplify mem_init(). Signed-off-by:
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Jiang Liu authored
Prepare for removing num_physpages and simplify mem_init(). Signed-off-by:
Jonas Bonn <jonas@southpole.se> Cc: David Howells <dhowells@redhat.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by:
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Jiang Liu authored
Prepare for removing num_physpages and simplify mem_init(). Signed-off-by:
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Jiang Liu authored
Prepare for removing num_physpages and simplify mem_init(). Signed-off-by:
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Jiang Liu authored
Prepare for removing num_physpages and simplify mem_init(). Signed-off-by:
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Jiang Liu authored
Prepare for removing num_physpages and simplify mem_init(). Signed-off-by:
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Jiang Liu authored
Prepare for removing num_physpages and simplify mem_init(). Signed-off-by:
Greg Ungerer <gerg@uclinux.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by:
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Jiang Liu authored
Prepare for removing num_physpages and simplify mem_init(). Signed-off-by:
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Jiang Liu authored
Prepare for removing num_physpages and simplify mem_init(). Signed-off-by:
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Jiang Liu authored
Prepare for removing num_physpages and simplify mem_init(). Signed-off-by:
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Jiang Liu authored
Prepare for removing num_physpages and simplify mem_init(). Signed-off-by:
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Jiang Liu authored
Prepare for removing num_physpages and simplify mem_init(). Signed-off-by:
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Jiang Liu authored
Prepare for removing num_physpages and simplify mem_init(). Signed-off-by:
Jesper Nilsson <jesper.nilsson@axis.com> Cc: Mikael Starvik <starvik@axis.com> Signed-off-by:
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Jiang Liu authored
Prepare for removing num_physpages and simplify mem_init(). Signed-off-by:
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Jiang Liu authored
Prepare for removing num_physpages and simplify mem_init(). Signed-off-by:
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Jiang Liu authored
Prepare for removing num_physpages and simplify mem_init(). Signed-off-by:
Hans-Christian Egtvedt <egtvedt@samfundet.no> Cc: Haavard Skinnemoen <hskinnemoen@gmail.com> Signed-off-by:
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Jiang Liu authored
Prepare for removing num_physpages and simplify mem_init(). Signed-off-by:
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Jiang Liu authored
Prepare for removing num_physpages and simplify mem_init(). Signed-off-by:
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Jiang Liu authored
Prepare for removing num_physpages and simplify mem_init(). Signed-off-by:
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Jiang Liu authored
Prepare for removing num_physpages and simplify mem_init(). Signed-off-by:
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Jiang Liu authored
Prepare for removing num_physpages. Signed-off-by:
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Jiang Liu authored
The global variable num_physpages is scheduled to be removed, so use totalram_pages instead of num_physpages at runtime. Signed-off-by:
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Jiang Liu authored
Introduce helper function mem_init_print_info() to simplify mem_init() across different architectures, which also unifies the format and information printed. Function mem_init_print_info() calculates memory statistics information without walking each page, so it should be a little faster on some architectures. Also introduce another helper get_num_physpages() to kill the global variable num_physpages. Signed-off-by:
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Jiang Liu authored
Normalize global variables exported by vmlinux.lds to conform usage guidelines from include/asm-generic/sections.h. 1) Use _text to mark the start of the kernel image including the head text, and _stext to mark the start of the .text section. 2) Export mandatory global variables __bss_stop. 3) Adjust __init_begin and __init_end to avoid acrossing .text and .data sections. Signed-off-by:
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Jiang Liu authored
Normalize global variables exported by vmlinux.lds to conform usage guidelines from include/asm-generic/sections.h. 1) Use _text to mark the start of the kernel image including the head text, and _stext to mark the start of the .text section. 2) Export mandatory global variables __init_begin and __init_end. Signed-off-by:
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Jiang Liu authored
Generate mandatory global variables _sdata in file vmlinux.lds. Signed-off-by:
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Jiang Liu authored
Generate mandatory global variables __bss_start/__bss_stop in file vmlinux.lds. Also remove one unused declaration of _text. Signed-off-by:
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Jiang Liu authored
Normalize global variables exported by vmlinux.lds to conform usage guidelines from include/asm-generic/sections.h. Use _text to mark the start of the kernel image including the head text, and _stext to mark the start of the .text section. This patch also fixes possible bugs due to current address layout that [__init_begin, __init_end] is a sub-range of [_stext, _etext] and pages within range [__init_begin, __init_end] will be freed by free_initmem(). Signed-off-by:
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Jiang Liu authored
Normalize global variables exported by vmlinux.lds to conform usage guidelines from include/asm-generic/sections.h. Use _text to mark the start of the kernel image including the head text, and _stext to mark the start of the .text section. Signed-off-by:
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Jiang Liu authored
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. 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 global variable num_physpages at runtime Patch 10: Don't update num_physpages in memory_hotplug.c Patch 11-40: Modify arch mm initialization code to: 1) Simplify mem_init() by using mem_init_print_info() 2) Prepare for killing global variable num_physpages Patch 41: Kill the 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 on an x86_64 system are: Log message before applying patches: Memory: 7745676k/8910848k available (6934k kernel code, 836024k absent, 329148k reserved, 6343k data, 1012k init) Log message after applying patches: Memory: 7744624K/8074824K available (6969K kernel code, 1011K data, 2828K rodata, 1016K init, 9640K bss, 330200K reserved) Great thanks to Vineet Gupta for testing on ARC. This patch: Document global variables exported from vmlinux.lds. 1) Add comments about usage guidelines for global variables exported from vmlinux.lds.S. 2) Remove unused __initdata_begin[] and __initdata_end[]. Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Vineet Gupta <vgupta@synopsys.com> Signed-off-by:
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Vineet Gupta authored
zap_pte_range loops from @addr to @end. In the middle, if it runs out of batching slots, TLB entries needs to be flushed for @start to @interim, NOT @interim to @end. Since ARC port doesn't use page free batching I can't test it myself but this seems like the right thing to do. Observed this when working on a fix for the issue at thread: http://www.spinics.net/lists/linux-arch/msg21736.htmlSigned-off-by:
Vineet Gupta <vgupta@synopsys.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Hugh Dickins <hughd@google.com> Cc: Rik van Riel <riel@redhat.com> Cc: David Rientjes <rientjes@google.com> Cc: Peter Zijlstra <peterz@infradead.org> Acked-by:
Catalin Marinas <catalin.marinas@arm.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by:
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Sergey Dyasly authored
Now there are only 2 members in struct page_cgroup. Update config MEMCG description accordingly. Signed-off-by:
Sergey Dyasly <dserrg@gmail.com> Acked-by:
Michal Hocko <mhocko@suse.cz> Acked-by:
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by:
Johannes Weiner <hannes@cmpxchg.org> Signed-off-by:
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Jiang Liu authored
As reported by https://bugzilla.kernel.org/show_bug.cgi?id=53501, "MemTotal" from /proc/meminfo means memory pages managed by the buddy system (managed_pages), but "MemTotal" from /sys/.../node/nodex/meminfo means physical pages present (present_pages) within the NUMA node. There's a difference between managed_pages and present_pages due to bootmem allocator and reserved pages. And Documentation/filesystems/proc.txt says MemTotal: Total usable ram (i.e. physical ram minus a few reserved bits and the kernel binary code) So change /sys/.../node/nodex/meminfo to report available pages within the node as "MemTotal". Signed-off-by:
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