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memobj: synch prefetch among processes

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This commit is contained in:
Balazs Gerofi
2016-12-18 13:46:46 +09:00
parent 5b7bcb7170
commit ff37ff9ccf
3 changed files with 32 additions and 6 deletions
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22
kernel/fileobj.c
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@@ -226,12 +226,26 @@ int fileobj_create(int fd, struct memobj **objp, int *maxprotp)
obj_list_insert(newobj);
obj = newobj;
to_memobj(obj)->flags |= result.flags;
to_memobj(obj)->status = MEMOBJ_READY;
if (to_memobj(obj)->flags & MF_PREFETCH) {
to_memobj(obj)->status = MEMOBJ_TO_BE_PREFETCHED;
}
newobj = NULL;
dkprintf("%s: new obj 0x%lx cref: %d, %s\n",
__FUNCTION__,
obj,
obj->cref,
to_memobj(obj)->flags & MF_ZEROFILL ? "zerofill" : "");
}
else {
++obj->sref;
++obj->cref;
memobj_unlock(&obj->memobj); /* locked by obj_list_lookup() */
dkprintf("%s: existing obj 0x%lx cref: %d, %s\n",
__FUNCTION__,
obj,
obj->cref,
to_memobj(obj)->flags & MF_ZEROFILL ? "zerofill" : "");
}
mcs_rwlock_writer_unlock_noirq(&fileobj_list_lock, &node);
@@ -281,7 +295,13 @@ static void fileobj_release(struct memobj *memobj)
memobj_unlock(&obj->memobj);
if (free_obj) {
mcs_lock_lock_noirq(&fileobj_list_lock, &node);
dkprintf("%s: release obj 0x%lx cref: %d, free_obj: 0x%lx, %s\n",
__FUNCTION__,
obj,
obj->cref,
free_obj,
to_memobj(obj)->flags & MF_ZEROFILL ? "zerofill" : "");
mcs_rwlock_writer_lock_noirq(&fileobj_list_lock, &node);
/* zap page_list */
for (;;) {
struct page *page;