[patch 00/22 -v3] Generic show_mem() - Kernel

This is a discussion on [patch 00/22 -v3] Generic show_mem() - Kernel ; Remove arch-specific show_mem() in favor of the generic version. This also removes the following redundant information display: - free pages, printed by show_free_areas() where show_mem() calls show_free_areas(). Signed-off-by: Johannes Weiner Acked-by: David Howells --- Index: tree-linus/arch/frv/Kconfig ================================================== ================= --- tree-linus.orig/arch/frv/Kconfig ...

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Thread: [patch 00/22 -v3] Generic show_mem()

  1. [patch 07/22 -v3] frv: Use generic show_mem()

    Remove arch-specific show_mem() in favor of the generic version.

    This also removes the following redundant information display:

    - free pages, printed by show_free_areas()

    where show_mem() calls show_free_areas().

    Signed-off-by: Johannes Weiner
    Acked-by: David Howells
    ---

    Index: tree-linus/arch/frv/Kconfig
    ================================================== =================
    --- tree-linus.orig/arch/frv/Kconfig
    +++ tree-linus/arch/frv/Kconfig
    @@ -6,6 +6,7 @@ config FRV
    bool
    default y
    select HAVE_IDE
    + select HAVE_GENERIC_SHOW_MEM

    config ZONE_DMA
    bool
    Index: tree-linus/arch/frv/mm/init.c
    ================================================== =================
    --- tree-linus.orig/arch/frv/mm/init.c
    +++ tree-linus/arch/frv/mm/init.c
    @@ -60,37 +60,6 @@ unsigned long empty_zero_page;

    /************************************************** ***************************/
    /*
    - *
    - */
    -void show_mem(void)
    -{
    - unsigned long i;
    - int free = 0, total = 0, reserved = 0, shared = 0;
    -
    - printk("\nMem-info:\n");
    - show_free_areas();
    - i = max_mapnr;
    - while (i-- > 0) {
    - struct page *page = &mem_map[i];
    -
    - total++;
    - if (PageReserved(page))
    - reserved++;
    - else if (!page_count(page))
    - free++;
    - else
    - shared += page_count(page) - 1;
    - }
    -
    - printk("%d pages of RAM\n",total);
    - printk("%d free pages\n",free);
    - printk("%d reserved pages\n",reserved);
    - printk("%d pages shared\n",shared);
    -
    -} /* end show_mem() */
    -
    -/************************************************** ***************************/
    -/*
    * paging_init() continues the virtual memory environment setup which
    * was begun by the code in arch/head.S.
    * The parameters are pointers to where to stick the starting and ending

    --

    --
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  2. [patch 11/22 -v3] m68knommu: Use generic show_mem()

    Remove arch-specific show_mem() in favor of the generic version.

    This also removes the following redundant information display:

    - free pages, printed by show_free_areas()
    - pages in swapcache, printed by show_swap_cache_info()

    where show_mem() calls show_free_areas(), which calls
    show_swap_cache_info().

    Signed-off-by: Johannes Weiner
    CC: Geert Uytterhoeven
    ---

    Index: tree-linus/arch/m68knommu/Kconfig
    ================================================== =================
    --- tree-linus.orig/arch/m68knommu/Kconfig
    +++ tree-linus/arch/m68knommu/Kconfig
    @@ -9,6 +9,7 @@ config M68K
    bool
    default y
    select HAVE_IDE
    + select HAVE_GENERIC_SHOW_MEM

    config MMU
    bool
    Index: tree-linus/arch/m68knommu/mm/init.c
    ================================================== =================
    --- tree-linus.orig/arch/m68knommu/mm/init.c
    +++ tree-linus/arch/m68knommu/mm/init.c
    @@ -62,33 +62,6 @@ static unsigned long empty_bad_page;

    unsigned long empty_zero_page;

    -void show_mem(void)
    -{
    - unsigned long i;
    - int free = 0, total = 0, reserved = 0, shared = 0;
    - int cached = 0;
    -
    - printk(KERN_INFO "\nMem-info:\n");
    - show_free_areas();
    - i = max_mapnr;
    - while (i-- > 0) {
    - total++;
    - if (PageReserved(mem_map+i))
    - reserved++;
    - else if (PageSwapCache(mem_map+i))
    - cached++;
    - else if (!page_count(mem_map+i))
    - free++;
    - else
    - shared += page_count(mem_map+i) - 1;
    - }
    - printk(KERN_INFO "%d pages of RAM\n",total);
    - printk(KERN_INFO "%d free pages\n",free);
    - printk(KERN_INFO "%d reserved pages\n",reserved);
    - printk(KERN_INFO "%d pages shared\n",shared);
    - printk(KERN_INFO "%d pages swap cached\n",cached);
    -}
    -
    extern unsigned long memory_start;
    extern unsigned long memory_end;


    --

    --
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  3. [patch 14/22 -v3] powerpc: Use generic show_mem()

    Remove arch-specific show_mem() in favor of the generic version.

    This also removes the following redundant information display:

    - pages in swapcache, printed by show_swap_cache_info()

    where show_mem() calls show_free_areas(), which calls
    show_swap_cache_info().

    Signed-off-by: Johannes Weiner
    CC: Paul Mackerras
    ---

    Index: tree-linus/arch/powerpc/Kconfig
    ================================================== =================
    --- tree-linus.orig/arch/powerpc/Kconfig
    +++ tree-linus/arch/powerpc/Kconfig
    @@ -91,6 +91,7 @@ config PPC
    select HAVE_OPROFILE
    select HAVE_KPROBES
    select HAVE_KRETPROBES
    + select HAVE_GENERIC_SHOW_MEM

    config EARLY_PRINTK
    bool
    Index: tree-linus/arch/powerpc/mm/mem.c
    ================================================== =================
    --- tree-linus.orig/arch/powerpc/mm/mem.c
    +++ tree-linus/arch/powerpc/mm/mem.c
    @@ -164,45 +164,6 @@ walk_memory_resource(unsigned long start

    #endif /* CONFIG_MEMORY_HOTPLUG */

    -void show_mem(void)
    -{
    - unsigned long total = 0, reserved = 0;
    - unsigned long shared = 0, cached = 0;
    - unsigned long highmem = 0;
    - struct page *page;
    - pg_data_t *pgdat;
    - unsigned long i;
    -
    - printk("Mem-info:\n");
    - show_free_areas();
    - for_each_online_pgdat(pgdat) {
    - unsigned long flags;
    - pgdat_resize_lock(pgdat, &flags);
    - for (i = 0; i < pgdat->node_spanned_pages; i++) {
    - if (!pfn_valid(pgdat->node_start_pfn + i))
    - continue;
    - page = pgdat_page_nr(pgdat, i);
    - total++;
    - if (PageHighMem(page))
    - highmem++;
    - if (PageReserved(page))
    - reserved++;
    - else if (PageSwapCache(page))
    - cached++;
    - else if (page_count(page))
    - shared += page_count(page) - 1;
    - }
    - pgdat_resize_unlock(pgdat, &flags);
    - }
    - printk("%ld pages of RAM\n", total);
    -#ifdef CONFIG_HIGHMEM
    - printk("%ld pages of HIGHMEM\n", highmem);
    -#endif
    - printk("%ld reserved pages\n", reserved);
    - printk("%ld pages shared\n", shared);
    - printk("%ld pages swap cached\n", cached);
    -}
    -
    /*
    * Initialize the bootmem system and give it all the memory we
    * have available. If we are using highmem, we only put the

    --

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