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mincore: take into account pages cached in memobj

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This commit is contained in:
NAKAMURA Gou
2016-03-14 18:58:41 +09:00
parent 604f846cd2
commit c9cc4330c8
1 changed files with 12 additions and 4 deletions
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16
kernel/syscall.c
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@ -3254,10 +3254,18 @@ SYSCALL_DECLARE(mincore)
ihk_mc_spinlock_lock_noirq(&vm->page_table_lock);
ptep = ihk_mc_pt_lookup_pte(vm->address_space->page_table,
(void *)addr, NULL, NULL, NULL);
/*
* XXX: It might be necessary to consider whether this page is COW page or not.
*/
value = (pte_is_present(ptep))? 1: 0;
if (ptep && pte_is_present(ptep)) {
value = 1;
}
else if (range->memobj) {
error = memobj_lookup_page(range->memobj,
range->objoff + (addr - range->start),
PAGE_P2ALIGN, NULL, NULL);
value = (!error)? 1: 0;
}
else {
value = 0;
}
ihk_mc_spinlock_unlock_noirq(&vm->page_table_lock);
ihk_mc_spinlock_unlock_noirq(&vm->memory_range_lock);