[PATCH] x86: remove end_user_pfn - Kernel

This is a discussion on [PATCH] x86: remove end_user_pfn - Kernel ; e820 map already get updated, so don't need to keep that anymore Signed-off-by: Yinghai Lu --- arch/x86/kernel/e820.c | 19 ++----------------- 1 file changed, 2 insertions(+), 17 deletions(-) Index: linux-2.6/arch/x86/kernel/e820.c ================================================== ================= --- linux-2.6.orig/arch/x86/kernel/e820.c +++ linux-2.6/arch/x86/kernel/e820.c @@ -1049,11 +1049,6 @@ u64 ...

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Thread: [PATCH] x86: remove end_user_pfn

  1. [PATCH] x86: remove end_user_pfn


    e820 map already get updated, so don't need to keep that anymore

    Signed-off-by: Yinghai Lu

    ---
    arch/x86/kernel/e820.c | 19 ++-----------------
    1 file changed, 2 insertions(+), 17 deletions(-)

    Index: linux-2.6/arch/x86/kernel/e820.c
    ================================================== =================
    --- linux-2.6.orig/arch/x86/kernel/e820.c
    +++ linux-2.6/arch/x86/kernel/e820.c
    @@ -1049,11 +1049,6 @@ u64 __init early_reserve_e820(u64 startt
    #endif

    /*
    - * Last pfn which the user wants to use.
    - */
    -unsigned long __initdata end_user_pfn = MAX_ARCH_PFN;
    -
    -/*
    * Find the highest page frame number we have available
    */
    static unsigned long __init e820_end_pfn(unsigned long limit_pfn, unsigned type)
    @@ -1085,8 +1080,6 @@ static unsigned long __init e820_end_pfn

    if (last_pfn > max_arch_pfn)
    last_pfn = max_arch_pfn;
    - if (last_pfn > end_user_pfn)
    - last_pfn = end_user_pfn;

    printk(KERN_INFO "last_pfn = %#lx max_arch_pfn = %#lx\n",
    last_pfn, max_arch_pfn);
    @@ -1131,12 +1124,6 @@ int __init e820_find_active_region(const
    if (*ei_endpfn > last_pfn)
    *ei_endpfn = last_pfn;

    - /* Obey end_user_pfn to save on memmap */
    - if (*ei_startpfn >= end_user_pfn)
    - return 0;
    - if (*ei_endpfn > end_user_pfn)
    - *ei_endpfn = end_user_pfn;
    -
    return 1;
    }

    @@ -1201,7 +1188,6 @@ static int __init parse_memopt(char *p)

    userdef = 1;
    mem_size = memparse(p, &p);
    - end_user_pfn = mem_size>>PAGE_SHIFT;
    e820_remove_range(mem_size, ULLONG_MAX - mem_size, E820_RAM, 1);

    return 0;
    @@ -1245,10 +1231,9 @@ static int __init parse_memmap_opt(char
    } else if (*p == '$') {
    start_at = memparse(p+1, &p);
    e820_add_region(start_at, mem_size, E820_RESERVED);
    - } else {
    - end_user_pfn = (mem_size >> PAGE_SHIFT);
    + } else
    e820_remove_range(mem_size, ULLONG_MAX - mem_size, E820_RAM, 1);
    - }
    +
    return *p == '\0' ? 0 : -EINVAL;
    }
    early_param("memmap", parse_memmap_opt);
    --
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  2. Re: [PATCH] x86: remove end_user_pfn


    * Yinghai Lu wrote:

    > e820 map already get updated, so don't need to keep that anymore


    applied the following patches to x86/core:

    Yinghai Lu (5):
    x86: max_low_pfn_mapped fix, #1
    x86: max_low_pfn_mapped fix, #2
    x86: max_low_pfn_mapped fix, #3
    x86, e820: remove end_user_pfn
    x86: fix numaq_tsc_disable calling

    thanks Yinghai!

    Ingo
    --
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