On Fri, Jun 08, 2012 at 02:08:04PM +0800, Junxiao Bi wrote:
> Ocfs2 uses kiocb.*private as a flag of unsigned long size. In
> commit a11f7e6 ocfs2: serialize unaligned aio, the unaligned
> io flag is involved in it to serialize the unaligned aio. As
> *private is not initialized in init_sync_kiocb() of do_sync_write(),
> this unaligned io flag may be unexpectly set in an aligned dio.
> And this will cause OCFS2_I(inode)->ip_unaligned_aio decreased
> to -1 in ocfs2_dio_end_io(), thus the following unaligned dio
> will hang forever at ocfs2_aiodio_wait() in ocfs2_file_aio_write().
>
> Signed-off-by: Junxiao Bi <[email protected]>
> Cc: [email protected]
> Acked-by: Jeff Moyer <[email protected]>
Acked-by: Joel Becker <[email protected]>
> ---
> include/linux/aio.h | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/include/linux/aio.h b/include/linux/aio.h
> index 2314ad8..b1a520e 100644
> --- a/include/linux/aio.h
> +++ b/include/linux/aio.h
> @@ -140,6 +140,7 @@ struct kiocb {
> (x)->ki_dtor = NULL; \
> (x)->ki_obj.tsk = tsk; \
> (x)->ki_user_data = 0; \
> + (x)->private = NULL; \
> } while (0)
>
> #define AIO_RING_MAGIC 0xa10a10a1
> --
> 1.7.9.5
>
--
"We will have to repent in this generation not merely for the
vitriolic words and actions of the bad people, but for the
appalling silence of the good people."
- Rev. Dr. Martin Luther King, Jr.
http://www.jlbec.org/
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