系统RAM是堆/堆栈所在的唯一部分吗? [英] Is System RAM the only section where heap/stack resides?

问题描述

[root@ ~]# cat /proc/iomem 
00000000-0000ffff : reserved
00010000-0009f7ff : System RAM
0009f800-0009ffff : reserved
000ca000-000cbfff : reserved
000dc000-000e3fff : reserved
000e8000-000fffff : reserved
00100000-3fedffff : System RAM
  01000000-013a5eb4 : Kernel code
  013a5eb5-0173e0c7 : Kernel data
  01805000-05d9d4f7 : Kernel bss
3fee0000-3fefefff : ACPI Tables
3feff000-3fefffff : ACPI Non-volatile Storage
3ff00000-3fffffff : System RAM
40000000-40007fff : 0000:00:0f.0
40008000-4000bfff : 0000:00:10.0
d0000000-d7ffffff : 0000:00:0f.0
d8000000-d87fffff : 0000:00:0f.0
d8800000-d881ffff : 0000:00:10.0
  d8800000-d881ffff : mpt
d8820000-d883ffff : 0000:00:10.0
  d8820000-d883ffff : mpt
d8900000-d9cfffff : PCI Bus 0000:02
  d8900000-d890ffff : 0000:02:01.0
    d8900000-d890ffff : e1000
  d8910000-d8910fff : 0000:02:03.0
    d8910000-d8910fff : ehci_hcd
  d8920000-d893ffff : 0000:02:01.0
    d8920000-d893ffff : e1000
d9d00000-d9dfffff : PCI Bus 0000:03
d9e00000-d9efffff : PCI Bus 0000:0b
d9f00000-d9ffffff : PCI Bus 0000:13
da000000-da0fffff : PCI Bus 0000:1b
da100000-da1fffff : PCI Bus 0000:04
da200000-da2fffff : PCI Bus 0000:0c
da300000-da3fffff : PCI Bus 0000:14
da400000-da4fffff : PCI Bus 0000:1c
da500000-da5fffff : PCI Bus 0000:05
da600000-da6fffff : PCI Bus 0000:0d
da700000-da7fffff : PCI Bus 0000:15
da800000-da8fffff : PCI Bus 0000:1d
da900000-da9fffff : PCI Bus 0000:06
daa00000-daafffff : PCI Bus 0000:0e
dab00000-dabfffff : PCI Bus 0000:16
dac00000-dacfffff : PCI Bus 0000:1e
dad00000-dadfffff : PCI Bus 0000:07
dae00000-daefffff : PCI Bus 0000:0f
daf00000-daffffff : PCI Bus 0000:17
db000000-db0fffff : PCI Bus 0000:1f
db100000-db1fffff : PCI Bus 0000:08
db200000-db2fffff : PCI Bus 0000:10
db300000-db3fffff : PCI Bus 0000:18
db400000-db4fffff : PCI Bus 0000:20
db500000-db5fffff : PCI Bus 0000:09
db600000-db6fffff : PCI Bus 0000:11
db700000-db7fffff : PCI Bus 0000:19
db800000-db8fffff : PCI Bus 0000:21
db900000-db9fffff : PCI Bus 0000:0a
dba00000-dbafffff : PCI Bus 0000:12
dbb00000-dbbfffff : PCI Bus 0000:1a
dbc00000-dbcfffff : PCI Bus 0000:22
dbe00000-dbffffff : pnp 00:0c
dc400000-dc9fffff : PCI Bus 0000:02
  dc400000-dc40ffff : 0000:02:01.0
dca00000-dcafffff : PCI Bus 0000:03
dcb00000-dcbfffff : PCI Bus 0000:0b
dcc00000-dccfffff : PCI Bus 0000:13
dcd00000-dcdfffff : PCI Bus 0000:1b
dce00000-dcefffff : PCI Bus 0000:04
dcf00000-dcffffff : PCI Bus 0000:0c
dd000000-dd0fffff : PCI Bus 0000:14
dd100000-dd1fffff : PCI Bus 0000:1c
dd200000-dd2fffff : PCI Bus 0000:05
dd300000-dd3fffff : PCI Bus 0000:0d
dd400000-dd4fffff : PCI Bus 0000:15
dd500000-dd5fffff : PCI Bus 0000:1d
dd600000-dd6fffff : PCI Bus 0000:06
dd700000-dd7fffff : PCI Bus 0000:0e
dd800000-dd8fffff : PCI Bus 0000:16
dd900000-dd9fffff : PCI Bus 0000:1e
dda00000-ddafffff : PCI Bus 0000:07
ddb00000-ddbfffff : PCI Bus 0000:0f
ddc00000-ddcfffff : PCI Bus 0000:17
ddd00000-dddfffff : PCI Bus 0000:1f
dde00000-ddefffff : PCI Bus 0000:08
ddf00000-ddffffff : PCI Bus 0000:10
de000000-de0fffff : PCI Bus 0000:18
de100000-de1fffff : PCI Bus 0000:20
de200000-de2fffff : PCI Bus 0000:09
de300000-de3fffff : PCI Bus 0000:11
de400000-de4fffff : PCI Bus 0000:19
de500000-de5fffff : PCI Bus 0000:21
de600000-de6fffff : PCI Bus 0000:0a
de700000-de7fffff : PCI Bus 0000:12
de800000-de8fffff : PCI Bus 0000:1a
de900000-de9fffff : PCI Bus 0000:22
e0000000-efffffff : PCI MMCONFIG 0 [00-ff]
  e0000000-efffffff : reserved
    e0000000-efffffff : pnp 00:0c
fec00000-fec0ffff : reserved
  fec00000-fec00fff : IOAPIC 0
fee00000-fee00fff : Local APIC
  fee00000-fee00fff : reserved
fffe0000-ffffffff : reserved

是真的，当我们在堆/堆栈上进行操作时，实际上是在系统RAM 上进行操作吗?

Is it true that when we operate on heap/stack,we are actually operating on the System RAM?

推荐答案

好吧，最终，您必须在系统RAM"上运行(我假设您的意思是物理RAM).你还能是什么?当内核实际给定代码周期时，堆栈和堆数据必须位于物理RAM中.当然，可以一路将其替换掉.交换时，它在进程地址空间中的虚拟地址将与它在物理RAM中的地址无关.但是，当它被操作时，它将位于物理RAM中.

Well, ultimately you have to be operating on "system RAM" (I assume you mean physical RAM). What else could you be? When the code actually is given cycles by the kernel, the stack and heap data has to be in physical RAM. Along the way it could be swapped out, of course. And its virtual address in the process address space will have no relation to its address in physical RAM when it's swapped in. But it will be living in physical RAM when it's operated on.

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