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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>
This commit is contained in:
Davidlohr Bueso 2014-12-12 16:54:36 -08:00 committed by Linus Torvalds
parent 874bfcaf79
commit d28eb9c861
1 changed files with 2 additions and 2 deletions
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4
mm/memory-failure.c
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@ -466,7 +466,7 @@ static void collect_procs_file(struct page *page, struct list_head *to_kill,
struct task_struct *tsk;
struct address_space *mapping = page->mapping;
i_mmap_lock_write(mapping);
i_mmap_lock_read(mapping);
read_lock(&tasklist_lock);
for_each_process(tsk) {
pgoff_t pgoff = page_to_pgoff(page);
@ -488,7 +488,7 @@ static void collect_procs_file(struct page *page, struct list_head *to_kill,
}
}
read_unlock(&tasklist_lock);
i_mmap_unlock_write(mapping);
i_mmap_unlock_read(mapping);
}
/*