On Mon, Mar 05, 2012 at 01:23:34PM -0800, Andrew Morton wrote:
> mmap_sem nests inside i_mutex.
>
> On the path
>
> munmap
> ->ecryptfs_vma_close
> ->filemap_write_and_wait
> ->generic_file_aio_write
>
> we're taking i_mutex inside mmap_sem. So the problem is triggered by
> ecryptfs_vma_close() calling filemap_write_and_wait() inside munmap()'s
> mmap_sem.
>
> Question is: what did we recently change to cause this to happen?
AFAICS, it's commit 32001d6fe9ac6b0423e674a3093aa56740849f3b
Author: Tyler Hicks <tyhicks@xxxxxxxxxxxxx>
Date: Mon Nov 21 17:31:29 2011 -0600
eCryptfs: Flush file in vma close
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