(no subject)

edjard_at_ufam.edu.br
Date: 11/15/03

  • Next message: Paul Mackerras: "Re: [PATCH] PPC32: cancel syscall restart on signal delivery" 
    Date:	Fri, 14 Nov 2003 22:49:45 -0200 (BRST)
To: linux-kernel@vger.kernel.org

    Hello All,

    We have tried to find out answer to our questions at the kernelnewbies
    list, but after many mails we had no conclusive opinion. Does any one
    here have n idea on how to solve it?

    The hacking challenge is:
    We are looking for a structure or variables that represent the size
    of heap, stack, code and data in physical memory. We found some
    structures on kernel source 2.6 like mm_struct and vm_area_struct,
    but these structures give the size of process (stack,code, data, heap
    separately) allocated in virtual memory. The only information we
    found about physical memory is rss, but this variable does not provide
    the size of stack, code, data, heap separately.

    The pmap of Linux doesn't provide these data also since it is
    actually inside /proc.

    We think the only way to get this information is through the way
    the page table sets the page resident flag and use some variables
    to calculate the size of such elements (stack, code, data, heap)
    allocated in physical memory. But the implementation of page
    table is not trivial, the same for pgd, pmd and pte.

    We'd like to know if it is possible to calculate the size of these
    elements without losing the OS performance?

    Is there any better solution to do that?

    Edjard

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  • Next message: Paul Mackerras: "Re: [PATCH] PPC32: cancel syscall restart on signal delivery"

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