memory-failure.c (92fd4d4d67b945c0766416284d4ab236b31542c4) memory-failure.c (20d6c96b5f1cad5c5da4641945ec17a1d9a1afc8)
1/*
2 * Copyright (C) 2008, 2009 Intel Corporation
3 * Authors: Andi Kleen, Fengguang Wu
4 *
5 * This software may be redistributed and/or modified under the terms of
6 * the GNU General Public License ("GPL") version 2 only as published by the
7 * Free Software Foundation.
8 *

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46#include <linux/swap.h>
47#include <linux/backing-dev.h>
48#include <linux/migrate.h>
49#include <linux/page-isolation.h>
50#include <linux/suspend.h>
51#include <linux/slab.h>
52#include <linux/swapops.h>
53#include <linux/hugetlb.h>
1/*
2 * Copyright (C) 2008, 2009 Intel Corporation
3 * Authors: Andi Kleen, Fengguang Wu
4 *
5 * This software may be redistributed and/or modified under the terms of
6 * the GNU General Public License ("GPL") version 2 only as published by the
7 * Free Software Foundation.
8 *

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46#include <linux/swap.h>
47#include <linux/backing-dev.h>
48#include <linux/migrate.h>
49#include <linux/page-isolation.h>
50#include <linux/suspend.h>
51#include <linux/slab.h>
52#include <linux/swapops.h>
53#include <linux/hugetlb.h>
54#include <linux/memory_hotplug.h>
54#include "internal.h"
55
56int sysctl_memory_failure_early_kill __read_mostly = 0;
57
58int sysctl_memory_failure_recovery __read_mostly = 1;
59
60atomic_long_t mce_bad_pages __read_mostly = ATOMIC_LONG_INIT(0);
61

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1225static int get_any_page(struct page *p, unsigned long pfn, int flags)
1226{
1227 int ret;
1228
1229 if (flags & MF_COUNT_INCREASED)
1230 return 1;
1231
1232 /*
55#include "internal.h"
56
57int sysctl_memory_failure_early_kill __read_mostly = 0;
58
59int sysctl_memory_failure_recovery __read_mostly = 1;
60
61atomic_long_t mce_bad_pages __read_mostly = ATOMIC_LONG_INIT(0);
62

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1226static int get_any_page(struct page *p, unsigned long pfn, int flags)
1227{
1228 int ret;
1229
1230 if (flags & MF_COUNT_INCREASED)
1231 return 1;
1232
1233 /*
1233 * The lock_system_sleep prevents a race with memory hotplug,
1234 * because the isolation assumes there's only a single user.
1234 * The lock_memory_hotplug prevents a race with memory hotplug.
1235 * This is a big hammer, a better would be nicer.
1236 */
1235 * This is a big hammer, a better would be nicer.
1236 */
1237 lock_system_sleep();
1237 lock_memory_hotplug();
1238
1239 /*
1240 * Isolate the page, so that it doesn't get reallocated if it
1241 * was free.
1242 */
1243 set_migratetype_isolate(p);
1244 /*
1245 * When the target page is a free hugepage, just remove it

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1259 pfn, p->flags);
1260 ret = -EIO;
1261 }
1262 } else {
1263 /* Not a free page */
1264 ret = 1;
1265 }
1266 unset_migratetype_isolate(p);
1238
1239 /*
1240 * Isolate the page, so that it doesn't get reallocated if it
1241 * was free.
1242 */
1243 set_migratetype_isolate(p);
1244 /*
1245 * When the target page is a free hugepage, just remove it

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1259 pfn, p->flags);
1260 ret = -EIO;
1261 }
1262 } else {
1263 /* Not a free page */
1264 ret = 1;
1265 }
1266 unset_migratetype_isolate(p);
1267 unlock_system_sleep();
1267 unlock_memory_hotplug();
1268 return ret;
1269}
1270
1271static int soft_offline_huge_page(struct page *page, int flags)
1272{
1273 int ret;
1274 unsigned long pfn = page_to_pfn(page);
1275 struct page *hpage = compound_head(page);

--- 192 unchanged lines hidden --- 		1268 return ret;
1269}
1270
1271static int soft_offline_huge_page(struct page *page, int flags)
1272{
1273 int ret;
1274 unsigned long pfn = page_to_pfn(page);
1275 struct page *hpage = compound_head(page);

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