* An question about too1/vm/page-types
@ 2016-07-22 3:24 zhong jiang
0 siblings, 0 replies; only message in thread
From: zhong jiang @ 2016-07-22 3:24 UTC (permalink / raw)
To: fengguang.wu, dyoung, Michal Hocko, mgorman, David Rientjes,
Vlastimil Babka
Cc: Linux Memory Management List
Hi, guys
the page range from 160 to 192 corresponding to the physcial address from a0000 to bffff.
That address space belongs to the PCI Bus we can get from the /proc/iomem.
we konw that the region may exist valid page struct, but PG_RESERVED should be set.
is right? but the actual is that page range is not any flag. I don't understand.
[root@localhost vm]# ./page-types -a 160,192
flags page-count MB symbolic-flags long-symbolic-flags
0x0000000000000000 32 0 __________________________________________
total 32 0
[root@localhost vm]# cat /proc/iomem | head -n5
00000000-00000fff : reserved
00001000-0009a7ff : System RAM
0009a800-0009ffff : reserved
000a0000-000bffff : PCI Bus 0000:00
000c0000-000c7fff : Video ROM
Thanks
zhongjiang
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