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    SubjectRe: [PATCH - resend] Memory-Hotplug: Fix the bug on interface /dev/mem for 64-bit kernel(v1)
    On 01/07/2010 07:32 PM, Zheng, Shaohui wrote:
    > Resend the patch to the mailing-list, the original patch URL is
    >, it is not accepted without comments,
    > sent it again to review.
    > Memory-Hotplug: Fix the bug on interface /dev/mem for 64-bit kernel
    > The new added memory can not be access by interface /dev/mem, because we do not
    > update the variable high_memory. This patch add a new e820 entry in e820 table,
    > and update max_pfn, max_low_pfn and high_memory.
    > We add a function update_pfn in file arch/x86/mm/init.c to udpate these
    > varibles. Memory hotplug does not make sense on 32-bit kernel, so we did not
    > concern it in this function.

    Memory hotplug makes sense on 32-bit kernels, at least in virtual


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