gh0s7/mckernel
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

get_mempolicy: Support (MPOL_F_NODE | MPOL_F_ADDR) specified

Browse Source 
If flags specifies both MPOL_F_NODE and MPOL_F_ADDR,
get_mempolicy() will return the node ID of the node on
which the address addr is allocated into the location pointed to by mode.

Change-Id: Id485e3f4838e3679d877a95e53b21e3421cac88a
This commit is contained in:
Ken Sato
2020-11-30 14:23:51 +09:00
committed by Masamichi Takagi
parent aef50d710c
commit 9f1e6d707c
3 changed files with 57 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

41
kernel/mem.c
View File

@ -2931,3 +2931,44 @@ retry:
return ptep;
}
int phys_to_nid(unsigned long p)
{
int i, numa_id = -1, _numa_id;
unsigned long _start, _end;
for (i = 0; i < ihk_mc_get_nr_memory_chunks(); i++) {
ihk_mc_get_memory_chunk(i, &_start, &_end, &_numa_id);
if (p >= _start && p < _end) {
numa_id = _numa_id;
goto out;
}
}
out:
return numa_id;
}
int lookup_node(struct process_vm *vm, void *addr)
{
int node, err, reason = PF_POPULATE | PF_USER;
pte_t *ptep;
err = page_fault_process_vm(vm, (void *)addr, reason);
if (err) {
node = err;
goto out;
}
ptep = ihk_mc_pt_lookup_pte(vm->address_space->page_table,
(void *)addr, 0, NULL, NULL, NULL);
if (!ptep || !pte_is_present(ptep)) {
node = -ENOENT;
goto out;
}
node = phys_to_nid(pte_get_phys(ptep));
out:
return node;
}