Messages in this thread | | | Date | Mon, 2 Nov 2020 09:20:29 -0500 | From | Johannes Weiner <> | Subject | Re: [PATCH v20 07/20] mm/vmscan: remove unnecessary lruvec adding |
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On Thu, Oct 29, 2020 at 06:44:52PM +0800, Alex Shi wrote: > We don't have to add a freeable page into lru and then remove from it. > This change saves a couple of actions and makes the moving more clear. > > The SetPageLRU needs to be kept before put_page_testzero for list > integrity, otherwise: > > #0 move_pages_to_lru #1 release_pages > if !put_page_testzero > if (put_page_testzero()) > !PageLRU //skip lru_lock > SetPageLRU() > list_add(&page->lru,) > list_add(&page->lru,) > > [akpm@linux-foundation.org: coding style fixes] > Signed-off-by: Alex Shi <alex.shi@linux.alibaba.com> > Acked-by: Hugh Dickins <hughd@google.com> > Cc: Andrew Morton <akpm@linux-foundation.org> > Cc: Johannes Weiner <hannes@cmpxchg.org> > Cc: Tejun Heo <tj@kernel.org> > Cc: Matthew Wilcox <willy@infradead.org> > Cc: Hugh Dickins <hughd@google.com> > Cc: linux-mm@kvack.org > Cc: linux-kernel@vger.kernel.org
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
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