Changeset c520034 in mainline for kernel/genarch/src/mm/as_ht.c

Timestamp:

2011-12-31T18:19:35Z (13 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

295f658, 77c2b02, 96cd5b4

Parents:

852052d (diff), 22f0561 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Support for kernel non-identity mappings, phase I.

• identity/non-identity kernel memory split on all architectures
• low/high physical memory split on all architectures
• frame allocator understands low/high memory
• high physical memory currently unused (Phase II)
• more compact frame_t
• zone conf frames, pte_t, kernel stacks allocated from low memory
• lockless TLB-miss handlers everywhere (newly sparc64, ia64)
• preallocate PTL1 page tables for non-identity and prevent their deallocation
• hw_map() unification
• new resource allocator used for allocating kernel virtual addresses

Breakage:

• sparc64/sun4v creates too large kernel identity; not fixed because of lack of testing hw
• ppc32's tlb_refill() seems wrong as it creates too large kernel identity, but appears unused and the architecture works normally

Not implemented yet (phase II):

• allow high memory to be used for common kernel allocations

File:

• kernel/genarch/src/mm/as_ht.c (modified) (2 diffs)

kernel/genarch/src/mm/as_ht.c

@@ -41 +41 @@
 #include <mm/as.h>
 #include <mm/frame.h>
+#include <mm/slab.h>
 #include <typedefs.h>
 #include <memstr.h>
@@ -77 +78 @@
                 hash_table_create(&page_ht, PAGE_HT_ENTRIES, 2, &ht_operations);
                 mutex_initialize(&page_ht_lock, MUTEX_PASSIVE);
+                pte_cache = slab_cache_create("pte_cache", sizeof(pte_t), 0, NULL, NULL,
+                    SLAB_CACHE_MAGDEFERRED);
         }