Merge tag 'dm-3.16-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/device...

[karo-tx-linux.git] / mm / memory-failure.c

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index c6399e32893178b835457388371e8e4f85512361..a013bc94ebbed4af3764e396b087475310ed5185 100644 (file)
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -435,7 +435,7 @@ static void collect_procs_anon(struct page *page, struct list_head *to_kill,
        if (av == NULL) /* Not actually mapped anymore */
                return;
 
-       pgoff = page->index << (PAGE_CACHE_SHIFT - PAGE_SHIFT);
+       pgoff = page_to_pgoff(page);
        read_lock(&tasklist_lock);
        for_each_process (tsk) {
                struct anon_vma_chain *vmac;
@@ -469,7 +469,7 @@ static void collect_procs_file(struct page *page, struct list_head *to_kill,
        mutex_lock(&mapping->i_mmap_mutex);
        read_lock(&tasklist_lock);
        for_each_process(tsk) {
-               pgoff_t pgoff = page->index << (PAGE_CACHE_SHIFT - PAGE_SHIFT);
+               pgoff_t pgoff = page_to_pgoff(page);
                struct task_struct *t = task_early_kill(tsk, force_early);
 
                if (!t)
@@ -895,7 +895,13 @@ static int hwpoison_user_mappings(struct page *p, unsigned long pfn,
        struct page *hpage = *hpagep;
        struct page *ppage;
 
-       if (PageReserved(p) || PageSlab(p) || !PageLRU(p))
+       /*
+        * Here we are interested only in user-mapped pages, so skip any
+        * other types of pages.
+        */
+       if (PageReserved(p) || PageSlab(p))
+               return SWAP_SUCCESS;
+       if (!(PageLRU(hpage) || PageHuge(p)))
                return SWAP_SUCCESS;
 
        /*
@@ -905,8 +911,10 @@ static int hwpoison_user_mappings(struct page *p, unsigned long pfn,
        if (!page_mapped(hpage))
                return SWAP_SUCCESS;
 
-       if (PageKsm(p))
+       if (PageKsm(p)) {
+               pr_err("MCE %#lx: can't handle KSM pages.\n", pfn);
                return SWAP_FAIL;
+       }
 
        if (PageSwapCache(p)) {
                printk(KERN_ERR
@@ -1229,7 +1237,7 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
         */
        if (hwpoison_user_mappings(p, pfn, trapno, flags, &hpage)
            != SWAP_SUCCESS) {
-               printk(KERN_ERR "MCE %#lx: cannot unmap page, give up\n", pfn);
+               action_result(pfn, "unmapping failed", IGNORED);
                res = -EBUSY;
                goto out;
        }