diff options
Diffstat (limited to 'contrib/netbsd-tests/rump/kernspace/busypage.c')
| -rw-r--r-- | contrib/netbsd-tests/rump/kernspace/busypage.c | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/contrib/netbsd-tests/rump/kernspace/busypage.c b/contrib/netbsd-tests/rump/kernspace/busypage.c new file mode 100644 index 0000000..e0142b7 --- /dev/null +++ b/contrib/netbsd-tests/rump/kernspace/busypage.c @@ -0,0 +1,94 @@ +/* $NetBSD: busypage.c,v 1.5 2011/08/07 14:03:15 rmind Exp $ */ + +/*- + * Copyright (c) 2010 The NetBSD Foundation, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND + * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, + * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER + * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN + * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +#if !defined(lint) +__RCSID("$NetBSD: busypage.c,v 1.5 2011/08/07 14:03:15 rmind Exp $"); +#endif /* !lint */ + +#include <sys/param.h> +#include <sys/condvar.h> +#include <sys/kthread.h> +#include <sys/mutex.h> +#include <sys/proc.h> + +#include <uvm/uvm.h> + +#include "kernspace.h" + +static struct uvm_object *uobj; +static struct vm_page *testpg; +static kcondvar_t tcv; + +static bool threadrun = false; + +static void +thread(void *arg) +{ + + mutex_enter(uobj->vmobjlock); + threadrun = true; + cv_signal(&tcv); + testpg->flags |= PG_WANTED; + UVM_UNLOCK_AND_WAIT(testpg, uobj->vmobjlock, false, "tw", 0); + kthread_exit(0); +} + +void +rumptest_busypage() +{ + struct lwp *newl; + int rv; + + cv_init(&tcv, "napina"); + + uobj = uao_create(1, 0); + mutex_enter(uobj->vmobjlock); + testpg = uvm_pagealloc(uobj, 0, NULL, 0); + mutex_exit(uobj->vmobjlock); + if (testpg == NULL) + panic("couldn't create vm page"); + + rv = kthread_create(PRI_NONE, KTHREAD_MUSTJOIN | KTHREAD_MPSAFE, NULL, + thread, NULL, &newl, "jointest"); + if (rv) + panic("thread creation failed: %d", rv); + + mutex_enter(uobj->vmobjlock); + while (!threadrun) + cv_wait(&tcv, uobj->vmobjlock); + + uvm_page_unbusy(&testpg, 1); + mutex_exit(uobj->vmobjlock); + + rv = kthread_join(newl); + if (rv) + panic("thread join failed: %d", rv); + +} |
