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keep page.count valid through its life cycle

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NAKAMURA Gou
2014-05-07 18:34:15 +09:00
parent 29c7d40005
commit ce7af5839d
4 changed files with 16 additions and 6 deletions
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4
kernel/process.c
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@@ -1090,6 +1090,7 @@ static int page_fault_process_memory_range(struct process_vm *vm,
p2align, IHK_MC_AP_NOWAIT);
if (virt) {
phys = virt_to_phys(virt);
page_map(phys_to_page(phys));
memset(virt, 0, pgsize);
break;
}
@@ -1160,6 +1161,7 @@ out:
}
}
if (virt != NULL) {
page_unmap(phys_to_page(phys));
ihk_mc_free_pages(virt, npages);
}
dkprintf("[%d]page_fault_process_memory_range(%p,%lx-%lx %lx,%lx): %d\n",
@@ -1234,6 +1236,7 @@ static int protection_fault_process_memory_range(struct process_vm *vm, struct v
memcpy(newkva, oldkva, pgsize);
newpa = virt_to_phys(newkva);
page_map(phys_to_page(newpa));
}
attr = vrflag_to_ptattr(range->flag);
@@ -1244,6 +1247,7 @@ static int protection_fault_process_memory_range(struct process_vm *vm, struct v
vm, range->start, range->end, range->flag,
fault_addr, error);
panic("protection_fault_process_memory_range:ihk_mc_pt_set_pte failed.");
page_unmap(phys_to_page(newpa));
ihk_mc_free_pages(newkva, npages);
goto out;
}