On Wed, 11 Jul 2012 18:57:43 -0700 (PDT) Hugh Dickins <hughd@xxxxxxxxxx> wrote:
> --- 3.5-rc6-mm1/mm/vmscan.c 2012-07-11 14:42:13.668335884 -0700
> +++ linux/mm/vmscan.c 2012-07-11 16:01:20.712814127 -0700
> @@ -726,7 +726,8 @@ static unsigned long shrink_page_list(st
> * writeback from reclaim and there is nothing else to
> * reclaim.
> */
> - if (!global_reclaim(sc) && PageReclaim(page))
> + if (!global_reclaim(sc) && PageReclaim(page) &&
> + may_enter_fs)
> wait_on_page_writeback(page);
> else {
> nr_writeback++;
um, that may_enter_fs test got removed because nobody knew why it was
there. Nobody knew why it was there because it was undocumented. Do
you see where I'm going with this?
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