Hi, I am trying to find the virtual to physical memory mapping of a process with kernel/linux-4.18.0-348.7.1.el8_5/tools/vm/page-types.c a) It gives the below output for a process with pid 19721 # ./page-types -p 19721 -l | head voffset offset len flags 400 108bf36 1 __RU_lA____M_______________________________ 600 135bf80 1 ___U_l_____Ma_b____________________________ 601 1258e11 1 ___U_l_____Ma_b____________________________ 6aa 110075a 1 ___U_l_____Ma_b____________________________ 7f335f72c 2741b88 4 __RU_lA____M_______________________________ 7f335f730 20546b1 3 __RU_lA____M_______________________________ 7f335f733 2741b3e 2 __RU_lA____M_______________________________ 7f335f735 2741a20 1e __RU_lA____M_______________________________ 7f335f753 2054690 1d __RU_lA____M_______________________________ Here the physical offsets are 28 bits. By adjusting for the 4k pagesize I can derive a meaningful 40 bit physical address. b) for another process it is giving # ./page-types -p 19694 -l | head voffset offset len flags 400 3f0366 1 __RU_lA____M_______________________________ 401 19a32b 1 __RU_lA____M_______________________________ 402 18d702 1 __RU_lA____M_______________________________ 403 3f3fe5 1 __RU_lA____M_______________________________ 404 1fbaa8 1 __RU_lA____M_______________________________ 405 3f3cea 1 __RU_lA____M_______________________________ 406 110455 1 __RU_lA____M_______________________________ 407 30a7a8 1 __RU_lA____M_______________________________ 408 2eaaee 1 __RU_lA____M_______________________________ In this, all the physical offsets are only 24 bits. Why is it like that? The flags are not showing it as a huge page also. RAM is mapped as # cat /proc/iomem | grep -i ram 00001000-0009ffff : System RAM 00100000-03ffffff : System RAM 04047000-75ceffff : System RAM 76000000-9fdbb017 : System RAM 9fdbb018-9fdcc457 : System RAM 9fdcc458-9fdcd017 : System RAM 9fdcd018-9fddb857 : System RAM 9fddb858-a21f1fff : System RAM a2245000-a2271fff : System RAM a2273000-a66c2fff : System RAM a99ff000-abffffff : System RAM 100000000-104fdfffff : System RAM 1050000000-204fefffff : System RAM 2050000000-304fefffff : System RAM 3050000000-404f2fffff : System RAM 4050000000-504fefffff : System RAM 5050000000-604fefffff : System RAM 6050000000-704fefffff : System RAM 7050000000-804fefffff : System RAM How do I find out to which NUMA node's ram the physical address "3f0366" belongs? --Arun