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yaml --- r: 14199 b: refs/heads/master c: 8315eca h: refs/heads/master i: 14197: 71aae41 14195: 9639fe0 14191: 682956f v: v3
git-mirror · Nov 15, 2005 · 330c620 · 330c620
1 parent b3a03e6
commit 330c620
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Showing 2 changed files with 6 additions and 2 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 59170891049cc469777a392e0b3f5aa7aad784a6
+refs/heads/master: 8315eca25583c369e28f48909d3341dc21d6214d
diff --git a/trunk/Documentation/x86_64/mm.txt b/trunk/Documentation/x86_64/mm.txt
@@ -6,14 +6,18 @@ Virtual memory map with 4 level page tables:
 0000000000000000 - 00007fffffffffff (=47bits) user space, different per mm
 hole caused by [48:63] sign extension
 ffff800000000000 - ffff80ffffffffff (=40bits) guard hole
-ffff810000000000 - ffffc0ffffffffff (=46bits) direct mapping of phys. memory
+ffff810000000000 - ffffc0ffffffffff (=46bits) direct mapping of all phys. memory
 ffffc10000000000 - ffffc1ffffffffff (=40bits) hole
 ffffc20000000000 - ffffe1ffffffffff (=45bits) vmalloc/ioremap space
 ... unused hole ...
 ffffffff80000000 - ffffffff82800000 (=40MB)   kernel text mapping, from phys 0
 ... unused hole ...
 ffffffff88000000 - fffffffffff00000 (=1919MB) module mapping space
 
+The direct mapping covers all memory in the system upto the highest
+memory address (this means in some cases it can also include PCI memory
+holes)
+
 vmalloc space is lazily synchronized into the different PML4 pages of
 the processes using the page fault handler, with init_level4_pgt as
 reference.