diff options
Diffstat (limited to 'mm/memory-failure.c')
| -rw-r--r-- | mm/memory-failure.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c index a0d9b4ac7d54..4f9b61f4a668 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -678,7 +678,7 @@ static void add_to_kill_fsdax(struct task_struct *tsk, struct page *p, */ static void collect_procs_fsdax(struct page *page, struct address_space *mapping, pgoff_t pgoff, - struct list_head *to_kill) + struct list_head *to_kill, bool pre_remove) { struct vm_area_struct *vma; struct task_struct *tsk; @@ -686,8 +686,15 @@ static void collect_procs_fsdax(struct page *page, i_mmap_lock_read(mapping); rcu_read_lock(); for_each_process(tsk) { - struct task_struct *t = task_early_kill(tsk, true); + struct task_struct *t = tsk; + /* + * Search for all tasks while MF_MEM_PRE_REMOVE is set, because + * the current may not be the one accessing the fsdax page. + * Otherwise, search for the current task. + */ + if (!pre_remove) + t = task_early_kill(tsk, true); if (!t) continue; vma_interval_tree_foreach(vma, &mapping->i_mmap, pgoff, pgoff) { @@ -1793,6 +1800,7 @@ int mf_dax_kill_procs(struct address_space *mapping, pgoff_t index, dax_entry_t cookie; struct page *page; size_t end = index + count; + bool pre_remove = mf_flags & MF_MEM_PRE_REMOVE; mf_flags |= MF_ACTION_REQUIRED | MF_MUST_KILL; @@ -1804,9 +1812,14 @@ int mf_dax_kill_procs(struct address_space *mapping, pgoff_t index, if (!page) goto unlock; - SetPageHWPoison(page); + if (!pre_remove) + SetPageHWPoison(page); - collect_procs_fsdax(page, mapping, index, &to_kill); + /* + * The pre_remove case is revoking access, the memory is still + * good and could theoretically be put back into service. + */ + collect_procs_fsdax(page, mapping, index, &to_kill, pre_remove); unmap_and_kill(&to_kill, page_to_pfn(page), mapping, index, mf_flags); unlock: |