1 /* $NetBSD: alloc.c,v 1.1 2010/06/14 21:06:09 pooka Exp $ */ 2 3 /*- 4 * Copyright (c) 2010 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND 17 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 23 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 26 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN 27 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 #if !defined(lint) 32 __RCSID("$NetBSD: alloc.c,v 1.1 2010/06/14 21:06:09 pooka Exp $"); 33 #endif /* !lint */ 34 35 #include <sys/param.h> 36 #include <sys/condvar.h> 37 #include <sys/kmem.h> 38 #include <sys/kthread.h> 39 #include <sys/mutex.h> 40 #include <sys/pool.h> 41 #include <sys/proc.h> 42 43 #include <uvm/uvm.h> 44 45 #include <rump/rumpuser.h> 46 #include "kernspace.h" 47 48 static void *store[32]; 49 static struct pool pp1, pp2; 50 51 static kmutex_t mtx; 52 static kcondvar_t kcv; 53 static int curstat; 54 55 static void 56 hthr(void *arg) 57 { 58 int i; 59 60 mutex_enter(&mtx); 61 curstat++; 62 cv_signal(&kcv); 63 64 while (curstat < 2) 65 cv_wait(&kcv, &mtx); 66 mutex_exit(&mtx); 67 68 /* try to guarantee that the sleep is triggered in PR_WAITOK */ 69 while ((kernel_map->flags & VM_MAP_WANTVA) == 0) 70 kpause("take5", false, 1, NULL); 71 72 for (i = 0; i < __arraycount(store); i++) { 73 pool_put(&pp1, store[i]); 74 } 75 76 kthread_exit(0); 77 } 78 79 void 80 rumptest_alloc(size_t thelimit) 81 { 82 char *c; 83 int succ, i; 84 85 mutex_init(&mtx, MUTEX_DEFAULT, IPL_NONE); 86 cv_init(&kcv, "venailu"); 87 88 kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, hthr, NULL, NULL, "h"); 89 90 pool_init(&pp1, 1024, 0, 0, 0, "vara-allas", 91 &pool_allocator_nointr, IPL_NONE); 92 pool_init(&pp2, 1024, 0, 0, 0, "allas", 93 &pool_allocator_nointr, IPL_NONE); 94 95 for (i = 0; i < __arraycount(store); i++) { 96 store[i] = pool_get(&pp1, PR_NOWAIT); 97 if (store[i] == NULL) { 98 panic("pool_get store failed"); 99 } 100 } 101 102 /* wait until other thread runs */ 103 mutex_enter(&mtx); 104 while (curstat == 0) 105 cv_wait(&kcv, &mtx); 106 mutex_exit(&mtx); 107 108 for (succ = 0;; succ++) { 109 if (succ * 1024 > thelimit) 110 panic("managed to allocate over limit"); 111 if ((c = pool_get(&pp2, PR_NOWAIT)) == NULL) { 112 mutex_enter(&mtx); 113 curstat++; 114 cv_signal(&kcv); 115 mutex_exit(&mtx); 116 if (pool_get(&pp2, PR_WAITOK) == NULL) 117 panic("pool get PR_WAITOK failed"); 118 break; 119 } 120 *c = 'a'; 121 } 122 } 123