Hi, My bad, PFN:3f0366 is falling under the range 100000000-104fdfffff. I got confused because of the difference in the number of bits in the PFN. Sorry for the noise. --Arun On Tue, Dec 6, 2022 at 12:13 PM Arun chandran <arun.edarath@xxxxxxxxx> wrote: > > 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 _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
