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add shared mapped file (in progress)

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implemented:
- Pages can be shared between maps.
- A change made to a map is written to the file, at munmap().

not yet implemented:
- VM operation during page IO execution.
  Because page IO is executed with VM's lock.
- Page IO, which does not change a file size with any case.
  When munmap() races with truncate(), the file size may be changed
  illegally.
This commit is contained in:
NAKAMURA Gou
2013-11-06 17:17:56 +09:00
parent d35140ab0b
commit bbbc6e1570
8 changed files with 153 additions and 24 deletions
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4
lib/include/ihk/mm.h
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@ -4,6 +4,8 @@
#include <ihk/types.h>
#include <memory.h>
struct memobj;
enum ihk_mc_gma_type {
IHK_MC_GMA_MAP_START,
IHK_MC_GMA_MAP_END,
@ -96,7 +98,7 @@ int ihk_mc_pt_change_page(page_table_t pt, void *virt,
int ihk_mc_pt_clear_page(page_table_t pt, void *virt);
int ihk_mc_pt_clear_large_page(page_table_t pt, void *virt);
int ihk_mc_pt_clear_range(page_table_t pt, void *start, void *end);
int ihk_mc_pt_free_range(page_table_t pt, void *start, void *end);
int ihk_mc_pt_free_range(page_table_t pt, void *start, void *end, struct memobj *memobj);
int ihk_mc_pt_change_attr_range(page_table_t pt, void *start, void *end,
enum ihk_mc_pt_attribute clrattr,
enum ihk_mc_pt_attribute setattr);