119 lines
2.4 KiB
C
119 lines
2.4 KiB
C
/*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*
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* Copyright (c) 2019 Cyril Hrubis <chrubis@suse.cz>
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*/
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/*
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* We are testing mbind() EIO error.
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*
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* We first fault a allocated page, then attempt to mbind it to a different node.
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*
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* This is a regression test for:
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*
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* a7f40cfe3b7a mm: mempolicy: make mbind() return -EIO when MPOL_MF_STRICT is specified
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*
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*/
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#include <errno.h>
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#include "config.h"
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#ifdef HAVE_NUMA_H
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# include <numa.h>
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# include <numaif.h>
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#endif
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#include "tst_test.h"
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#include "tst_numa.h"
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#ifdef HAVE_NUMA_V2
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static size_t page_size;
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static struct tst_nodemap *nodes;
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static void setup(void)
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{
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page_size = getpagesize();
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nodes = tst_get_nodemap(TST_NUMA_MEM, 2 * page_size / 1024);
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if (nodes->cnt <= 1)
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tst_brk(TCONF, "Test requires at least two NUMA memory nodes");
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}
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static void cleanup(void)
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{
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tst_nodemap_free(nodes);
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}
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static void verify_policy(int mode)
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{
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struct bitmask *bm = numa_allocate_nodemask();
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unsigned int i;
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void *ptr;
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unsigned long size = page_size;
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int node = 0;
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ptr = tst_numa_map(NULL, size);
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tst_nodemap_reset_counters(nodes);
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tst_numa_fault(ptr, size);
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tst_nodemap_count_pages(nodes, ptr, size);
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tst_nodemap_print_counters(nodes);
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for (i = 0; i < nodes->cnt; i++) {
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if (!nodes->counters[i]) {
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node = nodes->map[i];
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tst_res(TINFO, "Attempting to bind to node %i", node);
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numa_bitmask_setbit(bm, node);
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break;
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}
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}
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TEST(mbind(ptr, size, mode, bm->maskp, bm->size + 1, MPOL_MF_STRICT));
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tst_numa_unmap(ptr, size);
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numa_free_nodemask(bm);
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if (TST_RET != -1) {
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tst_res(TFAIL,
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"mbind(%s, MPOL_MF_STRICT) node %u returned %li, expected -1",
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tst_numa_mode_name(mode), node, TST_RET);
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return;
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}
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if (TST_ERR == EIO) {
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tst_res(TPASS | TTERRNO,
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"mbind(%s, MPOL_MF_STRICT) node %u",
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tst_numa_mode_name(mode), node);
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} else {
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tst_res(TFAIL | TTERRNO,
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"mbind(%s, MPOL_MF_STRICT) node %u expected EIO",
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tst_numa_mode_name(mode), node);
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}
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}
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static const int modes[] = {
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MPOL_PREFERRED,
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MPOL_BIND,
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MPOL_INTERLEAVE,
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};
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static void verify_mbind(unsigned int n)
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{
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verify_policy(modes[n]);
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}
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static struct tst_test test = {
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.setup = setup,
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.cleanup = cleanup,
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.test = verify_mbind,
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.tcnt = ARRAY_SIZE(modes),
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.tags = (const struct tst_tag[]) {
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{"linux-git", "a7f40cfe3b7a"},
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{}
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}
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};
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#else
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TST_TEST_TCONF(NUMA_ERROR_MSG);
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#endif /* HAVE_NUMA_H */
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