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-rw-r--r--mm/memory-failure.c25
1 files changed, 9 insertions, 16 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 5c8f7e0..740c4f5 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -52,6 +52,7 @@
#include <linux/swapops.h>
#include <linux/hugetlb.h>
#include <linux/memory_hotplug.h>
+#include <linux/mm_inline.h>
#include "internal.h"
int sysctl_memory_failure_early_kill __read_mostly = 0;
@@ -390,10 +391,11 @@ static void collect_procs_anon(struct page *page, struct list_head *to_kill,
struct task_struct *tsk;
struct anon_vma *av;
- read_lock(&tasklist_lock);
av = page_lock_anon_vma(page);
if (av == NULL) /* Not actually mapped anymore */
- goto out;
+ return;
+
+ read_lock(&tasklist_lock);
for_each_process (tsk) {
struct anon_vma_chain *vmac;
@@ -407,9 +409,8 @@ static void collect_procs_anon(struct page *page, struct list_head *to_kill,
add_to_kill(tsk, page, vma, to_kill, tkc);
}
}
- page_unlock_anon_vma(av);
-out:
read_unlock(&tasklist_lock);
+ page_unlock_anon_vma(av);
}
/*
@@ -423,17 +424,8 @@ static void collect_procs_file(struct page *page, struct list_head *to_kill,
struct prio_tree_iter iter;
struct address_space *mapping = page->mapping;
- /*
- * A note on the locking order between the two locks.
- * We don't rely on this particular order.
- * If you have some other code that needs a different order
- * feel free to switch them around. Or add a reverse link
- * from mm_struct to task_struct, then this could be all
- * done without taking tasklist_lock and looping over all tasks.
- */
-
- read_lock(&tasklist_lock);
mutex_lock(&mapping->i_mmap_mutex);
+ read_lock(&tasklist_lock);
for_each_process(tsk) {
pgoff_t pgoff = page->index << (PAGE_CACHE_SHIFT - PAGE_SHIFT);
@@ -453,8 +445,8 @@ static void collect_procs_file(struct page *page, struct list_head *to_kill,
add_to_kill(tsk, page, vma, to_kill, tkc);
}
}
- mutex_unlock(&mapping->i_mmap_mutex);
read_unlock(&tasklist_lock);
+ mutex_unlock(&mapping->i_mmap_mutex);
}
/*
@@ -1468,7 +1460,8 @@ int soft_offline_page(struct page *page, int flags)
put_page(page);
if (!ret) {
LIST_HEAD(pagelist);
-
+ inc_zone_page_state(page, NR_ISOLATED_ANON +
+ page_is_file_cache(page));
list_add(&page->lru, &pagelist);
ret = migrate_pages(&pagelist, new_page, MPOL_MF_MOVE_ALL,
0, true);
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