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    SubjectRE: [2.6.6 PATCH] Exposing EFI memory map
    + -----Original Message-----
    + From: Greg KH []
    + Sent: Saturday, May 08, 2004 3:19 AM
    + To: Sourav Sen
    + Cc:;;
    + Subject: Re: [2.6.6 PATCH] Exposing EFI memory map
    + On Fri, May 07, 2004 at 03:15:30PM +0530, Sourav Sen wrote:
    + > Here we have "Array of values of same types". And it does
    + not do much
    + > nifty formatting either. Is that not acceptable?
    + But they are not of the same time, as you admitted :)

    Right. On similar lines I believe we need to split
    firmware/efi/systab as well.

    + Also, they could be bigger than a single page, right? That is not
    + possible right now in sysfs.
    + > If that is not, how about the following.
    + >
    + > 1. Create a directory "memmap" under firmware/efi/
    + > 2. Create files "map_start", "map_size" and "mapdesc_size" under
    + > that exposing ia64_boot_param->efi_memmap,
    + > ia64_boot_param->efi_memmap_size
    + > and ia64_boot_param->efi_memdesc_size respectively.
    + >
    + > Userland can make meaning out of them by knowing the values
    + and knowing
    + > about "efi_memory_desc_t" which is already there in
    + > /usr/include/asm/efi.h
    + I think you should address the other issues in this thread before
    + worrying about the sysfs interface (why have this at all, incorrect
    + data for hotplug mem, etc.)
    I did not hear whether the idea of updating efi memory map on a
    hotplug is good or bad. In any case, can somebody tell me to how do
    I get the available physical range map (only the ranges that VM is
    using at a given point in time) from userland. I believe I outlined
    a legitimate requirement earlier in this thread :-)

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