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Refactor "do write back only MAP_SHARED pages"

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* free_process_memory_range() always passes memobj to
  ihk_mc_pt_free_range()
* clear_range_*() don't flush page in fileobj with MF_PRIVATE flag

Fujitsu: POSTK_DEBUG_TEMP_FIX_87
Change-Id: I8d46d029b3fc51ca6f0e59d748a2fe93e324a374
This commit is contained in:
Masamichi Takagi
2018-10-12 13:37:50 +09:00
committed by Dominique Martinet
parent fb24dcea2e
commit 9cfc373538
7 changed files with 28 additions and 15 deletions
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4
kernel/include/memobj.h
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@@ -35,6 +35,7 @@ enum {
MF_ZEROOBJ = 0x20000, /* To identify pages of anonymous, on-demand paging ranges for rusage accounting */
MF_SHM = 0x40000,
MF_HUGETLBFS = 0x100000,
MF_PRIVATE = 0x200000, /* To prevent flush in clear_range_* */
};
#define MEMOBJ_READY 0
@@ -139,7 +140,8 @@ static inline int memobj_is_removable(struct memobj *obj)
return !!(obj->flags & MF_IS_REMOVABLE);
}
int fileobj_create(int fd, struct memobj **objp, int *maxprotp, uintptr_t virt_addr);
int fileobj_create(int fd, struct memobj **objp, int *maxprotp, int flags,
uintptr_t virt_addr);
struct shmid_ds;
int shmobj_create(struct shmid_ds *ds, struct memobj **objp);
int zeroobj_create(struct memobj **objp);