[Crash-utility] Re: [BUG FIXED]fix bug of CACHED in kmem -i show memory

Hi lianbo: I have a bug fixed need to merge to crash-utility which patch in attachment. It can obviously see that kmem -i show memory info of system. But CACHED have wrong output for add up size of cached memory. The reason of this bug is: newest kernel version use "struct address_space *swapper_spaces[MAX_SWAPFILES]" instead of "struct address_space swapper_spaces[MAX_SWAPFILES]" in old kernel. this change bring into kernel after kernel 4.11.0

So newest version need to readmem twice, first is address of one struct address_space second is value of struct address_space. This bug fix patch add twice readmem when read swapper_spaces struct, it can accurately read nrpage in struct address_space. And i found that definition of struct address_space swapper_spaces change in kernel 4.11.0, so i make kernel version compatible for this change. fix before: crash> kmem -i PAGES TOTAL PERCENTAGE TOTAL MEM 2854115 10.9 GB ---- FREE 169699 662.9 MB 5% of TOTAL MEM USED 2684416 10.2 GB 94% of TOTAL MEM SHARED 891094 3.4 GB 31% of TOTAL MEM BUFFERS 329 1.3 MB 0% of TOTAL MEM CACHED 873327085626 3331478.4 GB 30598875% of TOTAL MEM SLAB 230128 898.9 MB 8% of TOTAL MEM fix after: crash> kmem -i PAGES TOTAL PERCENTAGE TOTAL MEM 2854115 10.9 GB ---- FREE 169699 662.9 MB 5% of TOTAL MEM USED 2684416 10.2 GB 94% of TOTAL MEM SHARED 891094 3.4 GB 31% of TOTAL MEM BUFFERS 329 1.3 MB 0% of TOTAL MEM CACHED 1729018 6.6 GB 60% of TOTAL MEM SLAB 230128 898.9 MB 8% of TOTAL MEM Thanks Best Regards