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mm/memory-failure: share the i_mmap_rwsem
No brainer conversion: collect_procs_file() only schedules a process for later kill, share the lock, similarly to the anon vma variant. Signed-off-by: Davidlohr Bueso <dbueso@suse.de> Acked-by: "Kirill A. Shutemov" <kirill@shutemov.name> Acked-by: Hugh Dickins <hughd@google.com> Cc: Oleg Nesterov <oleg@redhat.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Acked-by: Mel Gorman <mgorman@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -466,7 +466,7 @@ static void collect_procs_file(struct page *page, struct list_head *to_kill,
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struct task_struct *tsk;
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struct address_space *mapping = page->mapping;
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i_mmap_lock_write(mapping);
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i_mmap_lock_read(mapping);
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read_lock(&tasklist_lock);
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for_each_process(tsk) {
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pgoff_t pgoff = page_to_pgoff(page);
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@ -488,7 +488,7 @@ static void collect_procs_file(struct page *page, struct list_head *to_kill,
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}
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}
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read_unlock(&tasklist_lock);
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i_mmap_unlock_write(mapping);
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i_mmap_unlock_read(mapping);
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}
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/*
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