On Mon, Jan 31, 2011 at 11:03 PM, Johannes Weiner <hannes@xxxxxxxxxxx> wrote: > If reclaim after a failed charging was unsuccessful, the limits are > checked again, just in case they settled by means of other tasks. > > This is all fine as long as every charge is of size PAGE_SIZE, because > in that case, being below the limit means having at least PAGE_SIZE > bytes available. > > But with transparent huge pages, we may end up in an endless loop > where charging and reclaim fail, but we keep going because the limits > are not yet exceeded, although not allowing for a huge page. > > Fix this up by explicitely checking for enough room, not just whether > we are within limits. > > Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx> Reviewed-by: Minchan Kim <minchan.kim@xxxxxxxxx> -- 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=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>