On Sat, Dec 18, 2010 at 12:34 AM, Minchan Kim <minchan.kim@xxxxxxxxx> wrote: > 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? No. balance_dirty_pages tracepoint is new. :) > > -- > Kind regards, > Minchan Kim > -- Kind regards, Minchan Kim -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: <a href