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245b2e70ea
Percpu variable definition is about to be updated such that all percpu symbols including the static ones must be unique. Update percpu variable definitions accordingly. * as,cfq: rename ioc_count uniquely * cpufreq: rename cpu_dbs_info uniquely * xen: move nesting_count out of xen_evtchn_do_upcall() and rename it * mm: move ratelimits out of balance_dirty_pages_ratelimited_nr() and rename it * ipv4,6: rename cookie_scratch uniquely * x86 perf_counter: rename prev_left to pmc_prev_left, irq_entry to pmc_irq_entry and nmi_entry to pmc_nmi_entry * perf_counter: rename disable_count to perf_disable_count * ftrace: rename test_event_disable to ftrace_test_event_disable * kmemleak: rename test_pointer to kmemleak_test_pointer * mce: rename next_interval to mce_next_interval [ Impact: percpu usage cleanups, no duplicate static percpu var names ] Signed-off-by: Tejun Heo <tj@kernel.org> Reviewed-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Dave Jones <davej@redhat.com> Cc: Jeremy Fitzhardinge <jeremy@xensource.com> Cc: linux-mm <linux-mm@kvack.org> Cc: David S. Miller <davem@davemloft.net> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Steven Rostedt <srostedt@redhat.com> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Andi Kleen <andi@firstfloor.org>
112 lines
3.3 KiB
C
112 lines
3.3 KiB
C
/*
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* mm/kmemleak-test.c
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*
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* Copyright (C) 2008 ARM Limited
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* Written by Catalin Marinas <catalin.marinas@arm.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/vmalloc.h>
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#include <linux/list.h>
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#include <linux/percpu.h>
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#include <linux/fdtable.h>
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#include <linux/kmemleak.h>
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struct test_node {
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long header[25];
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struct list_head list;
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long footer[25];
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};
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static LIST_HEAD(test_list);
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static DEFINE_PER_CPU(void *, kmemleak_test_pointer);
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/*
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* Some very simple testing. This function needs to be extended for
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* proper testing.
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*/
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static int __init kmemleak_test_init(void)
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{
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struct test_node *elem;
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int i;
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printk(KERN_INFO "Kmemleak testing\n");
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/* make some orphan objects */
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pr_info("kmemleak: kmalloc(32) = %p\n", kmalloc(32, GFP_KERNEL));
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pr_info("kmemleak: kmalloc(32) = %p\n", kmalloc(32, GFP_KERNEL));
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pr_info("kmemleak: kmalloc(1024) = %p\n", kmalloc(1024, GFP_KERNEL));
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pr_info("kmemleak: kmalloc(1024) = %p\n", kmalloc(1024, GFP_KERNEL));
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pr_info("kmemleak: kmalloc(2048) = %p\n", kmalloc(2048, GFP_KERNEL));
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pr_info("kmemleak: kmalloc(2048) = %p\n", kmalloc(2048, GFP_KERNEL));
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pr_info("kmemleak: kmalloc(4096) = %p\n", kmalloc(4096, GFP_KERNEL));
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pr_info("kmemleak: kmalloc(4096) = %p\n", kmalloc(4096, GFP_KERNEL));
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#ifndef CONFIG_MODULES
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pr_info("kmemleak: kmem_cache_alloc(files_cachep) = %p\n",
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kmem_cache_alloc(files_cachep, GFP_KERNEL));
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pr_info("kmemleak: kmem_cache_alloc(files_cachep) = %p\n",
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kmem_cache_alloc(files_cachep, GFP_KERNEL));
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#endif
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pr_info("kmemleak: vmalloc(64) = %p\n", vmalloc(64));
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pr_info("kmemleak: vmalloc(64) = %p\n", vmalloc(64));
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pr_info("kmemleak: vmalloc(64) = %p\n", vmalloc(64));
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pr_info("kmemleak: vmalloc(64) = %p\n", vmalloc(64));
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pr_info("kmemleak: vmalloc(64) = %p\n", vmalloc(64));
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/*
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* Add elements to a list. They should only appear as orphan
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* after the module is removed.
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*/
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for (i = 0; i < 10; i++) {
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elem = kmalloc(sizeof(*elem), GFP_KERNEL);
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pr_info("kmemleak: kmalloc(sizeof(*elem)) = %p\n", elem);
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if (!elem)
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return -ENOMEM;
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memset(elem, 0, sizeof(*elem));
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INIT_LIST_HEAD(&elem->list);
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list_add_tail(&elem->list, &test_list);
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}
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for_each_possible_cpu(i) {
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per_cpu(kmemleak_test_pointer, i) = kmalloc(129, GFP_KERNEL);
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pr_info("kmemleak: kmalloc(129) = %p\n",
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per_cpu(kmemleak_test_pointer, i));
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}
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return 0;
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}
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module_init(kmemleak_test_init);
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static void __exit kmemleak_test_exit(void)
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{
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struct test_node *elem, *tmp;
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/*
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* Remove the list elements without actually freeing the
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* memory.
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*/
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list_for_each_entry_safe(elem, tmp, &test_list, list)
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list_del(&elem->list);
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}
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module_exit(kmemleak_test_exit);
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MODULE_LICENSE("GPL");
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