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87 lines
1.6 KiB
87 lines
1.6 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* iteration_check_2.c: Check that deleting a tagged entry doesn't cause |
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* an RCU walker to finish early. |
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* Copyright (c) 2020 Oracle |
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* Author: Matthew Wilcox <[email protected]> |
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*/ |
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#include <pthread.h> |
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#include "test.h" |
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static volatile bool test_complete; |
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static void *iterator(void *arg) |
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{ |
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XA_STATE(xas, arg, 0); |
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void *entry; |
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rcu_register_thread(); |
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while (!test_complete) { |
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xas_set(&xas, 0); |
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rcu_read_lock(); |
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xas_for_each_marked(&xas, entry, ULONG_MAX, XA_MARK_0) |
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; |
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rcu_read_unlock(); |
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assert(xas.xa_index >= 100); |
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} |
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rcu_unregister_thread(); |
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return NULL; |
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} |
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static void *throbber(void *arg) |
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{ |
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struct xarray *xa = arg; |
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rcu_register_thread(); |
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while (!test_complete) { |
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int i; |
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for (i = 0; i < 100; i++) { |
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xa_store(xa, i, xa_mk_value(i), GFP_KERNEL); |
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xa_set_mark(xa, i, XA_MARK_0); |
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} |
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for (i = 0; i < 100; i++) |
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xa_erase(xa, i); |
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} |
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rcu_unregister_thread(); |
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return NULL; |
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} |
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void iteration_test2(unsigned test_duration) |
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{ |
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pthread_t threads[2]; |
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DEFINE_XARRAY(array); |
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int i; |
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printv(1, "Running iteration test 2 for %d seconds\n", test_duration); |
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test_complete = false; |
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xa_store(&array, 100, xa_mk_value(100), GFP_KERNEL); |
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xa_set_mark(&array, 100, XA_MARK_0); |
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if (pthread_create(&threads[0], NULL, iterator, &array)) { |
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perror("create iterator thread"); |
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exit(1); |
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} |
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if (pthread_create(&threads[1], NULL, throbber, &array)) { |
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perror("create throbber thread"); |
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exit(1); |
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} |
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sleep(test_duration); |
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test_complete = true; |
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for (i = 0; i < 2; i++) { |
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if (pthread_join(threads[i], NULL)) { |
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perror("pthread_join"); |
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exit(1); |
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} |
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} |
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xa_destroy(&array); |
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}
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