On Fri, Dec 17, 2010 at 8:21 PM, Wu Fengguang <fengguang.wu@xxxxxxxxx> wrote: > This avoids unnecessary checks and dirty throttling on tmpfs/ramfs. > > It also prevents > > [ 388.126563] BUG: unable to handle kernel NULL pointer dereference at 0000000000000050 > > in the balance_dirty_pages tracepoint, which will call > > dev_name(mapping->backing_dev_info->dev) > > but shmem_backing_dev_info.dev is NULL. > > CC: Hugh Dickins <hughd@xxxxxxxxxx> > Signed-off-by: Wu Fengguang <fengguang.wu@xxxxxxxxx> Reviewed-by: Minchan Kim <minchan.kim@xxxxxxxxx> Is it a material for -stable? -- Kind regards, Minchan Kim -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
