From: Alex Shi <alex.shi@linux.alibaba.com> To: akpm@linux-foundation.org, mgorman@techsingularity.net, tj@kernel.org, hughd@google.com, khlebnikov@yandex-team.ru, daniel.m.jordan@oracle.com, yang.shi@linux.alibaba.com, willy@infradead.org, hannes@cmpxchg.org, lkp@intel.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, shakeelb@google.com, iamjoonsoo.kim@lge.com, richard.weiyang@gmail.com, kirill@shutemov.name Subject: [PATCH v16 01/22] mm/vmscan: remove unnecessary lruvec adding Date: Sat, 11 Jul 2020 08:58:35 +0800 [thread overview] Message-ID: <1594429136-20002-2-git-send-email-alex.shi@linux.alibaba.com> (raw) In-Reply-To: <1594429136-20002-1-git-send-email-alex.shi@linux.alibaba.com> 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 here for list intergrity. Otherwise: #0 mave_pages_to_lru #1 release_pages if (put_page_testzero()) if !put_page_testzero !PageLRU //skip lru_lock list_add(&page->lru,) list_add(&page->lru,) //corrupt [akpm@linux-foundation.org: coding style fixes] Signed-off-by: Alex Shi <alex.shi@linux.alibaba.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 --- mm/vmscan.c | 37 ++++++++++++++++++++++++------------- 1 file changed, 24 insertions(+), 13 deletions(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index 749d239c62b2..ddb29d813d77 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1856,26 +1856,29 @@ static unsigned noinline_for_stack move_pages_to_lru(struct lruvec *lruvec, while (!list_empty(list)) { page = lru_to_page(list); VM_BUG_ON_PAGE(PageLRU(page), page); + list_del(&page->lru); if (unlikely(!page_evictable(page))) { - list_del(&page->lru); spin_unlock_irq(&pgdat->lru_lock); putback_lru_page(page); spin_lock_irq(&pgdat->lru_lock); continue; } - lruvec = mem_cgroup_page_lruvec(page, pgdat); + /* + * The SetPageLRU needs to be kept here for list intergrity. + * Otherwise: + * #0 mave_pages_to_lru #1 release_pages + * if (put_page_testzero()) + * if !put_page_testzero + * !PageLRU //skip lru_lock + * list_add(&page->lru,) + * list_add(&page->lru,) //corrupt + */ SetPageLRU(page); - lru = page_lru(page); - nr_pages = hpage_nr_pages(page); - update_lru_size(lruvec, lru, page_zonenum(page), nr_pages); - list_move(&page->lru, &lruvec->lists[lru]); - - if (put_page_testzero(page)) { + if (unlikely(put_page_testzero(page))) { __ClearPageLRU(page); __ClearPageActive(page); - del_page_from_lru_list(page, lruvec, lru); if (unlikely(PageCompound(page))) { spin_unlock_irq(&pgdat->lru_lock); @@ -1883,11 +1886,19 @@ static unsigned noinline_for_stack move_pages_to_lru(struct lruvec *lruvec, spin_lock_irq(&pgdat->lru_lock); } else list_add(&page->lru, &pages_to_free); - } else { - nr_moved += nr_pages; - if (PageActive(page)) - workingset_age_nonresident(lruvec, nr_pages); + + continue; } + + lruvec = mem_cgroup_page_lruvec(page, pgdat); + lru = page_lru(page); + nr_pages = hpage_nr_pages(page); + + update_lru_size(lruvec, lru, page_zonenum(page), nr_pages); + list_add(&page->lru, &lruvec->lists[lru]); + nr_moved += nr_pages; + if (PageActive(page)) + workingset_age_nonresident(lruvec, nr_pages); } /* -- 1.8.3.1
WARNING: multiple messages have this Message-ID (diff)
From: Alex Shi <alex.shi-KPsoFbNs7GizrGE5bRqYAgC/G2K4zDHf@public.gmane.org> To: akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org, mgorman-3eNAlZScCAx27rWaFMvyedHuzzzSOjJt@public.gmane.org, tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, hughd-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org, khlebnikov-XoJtRXgx1JseBXzfvpsJ4g@public.gmane.org, daniel.m.jordan-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org, yang.shi-KPsoFbNs7GizrGE5bRqYAgC/G2K4zDHf@public.gmane.org, willy-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org, hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org, lkp-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, shakeelb-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org, iamjoonsoo.kim-Hm3cg6mZ9cc@public.gmane.org, richard.weiyang-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, kirill-oKw7cIdHH8eLwutG50LtGA@public.gmane.org Subject: [PATCH v16 01/22] mm/vmscan: remove unnecessary lruvec adding Date: Sat, 11 Jul 2020 08:58:35 +0800 [thread overview] Message-ID: <1594429136-20002-2-git-send-email-alex.shi@linux.alibaba.com> (raw) In-Reply-To: <1594429136-20002-1-git-send-email-alex.shi-KPsoFbNs7GizrGE5bRqYAgC/G2K4zDHf@public.gmane.org> 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 here for list intergrity. Otherwise: #0 mave_pages_to_lru #1 release_pages if (put_page_testzero()) if !put_page_testzero !PageLRU //skip lru_lock list_add(&page->lru,) list_add(&page->lru,) //corrupt [akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org: coding style fixes] Signed-off-by: Alex Shi <alex.shi-KPsoFbNs7GizrGE5bRqYAgC/G2K4zDHf@public.gmane.org> Cc: Andrew Morton <akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org> Cc: Johannes Weiner <hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org> Cc: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> Cc: Matthew Wilcox <willy-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org> Cc: Hugh Dickins <hughd-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org> Cc: linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org --- mm/vmscan.c | 37 ++++++++++++++++++++++++------------- 1 file changed, 24 insertions(+), 13 deletions(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index 749d239c62b2..ddb29d813d77 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1856,26 +1856,29 @@ static unsigned noinline_for_stack move_pages_to_lru(struct lruvec *lruvec, while (!list_empty(list)) { page = lru_to_page(list); VM_BUG_ON_PAGE(PageLRU(page), page); + list_del(&page->lru); if (unlikely(!page_evictable(page))) { - list_del(&page->lru); spin_unlock_irq(&pgdat->lru_lock); putback_lru_page(page); spin_lock_irq(&pgdat->lru_lock); continue; } - lruvec = mem_cgroup_page_lruvec(page, pgdat); + /* + * The SetPageLRU needs to be kept here for list intergrity. + * Otherwise: + * #0 mave_pages_to_lru #1 release_pages + * if (put_page_testzero()) + * if !put_page_testzero + * !PageLRU //skip lru_lock + * list_add(&page->lru,) + * list_add(&page->lru,) //corrupt + */ SetPageLRU(page); - lru = page_lru(page); - nr_pages = hpage_nr_pages(page); - update_lru_size(lruvec, lru, page_zonenum(page), nr_pages); - list_move(&page->lru, &lruvec->lists[lru]); - - if (put_page_testzero(page)) { + if (unlikely(put_page_testzero(page))) { __ClearPageLRU(page); __ClearPageActive(page); - del_page_from_lru_list(page, lruvec, lru); if (unlikely(PageCompound(page))) { spin_unlock_irq(&pgdat->lru_lock); @@ -1883,11 +1886,19 @@ static unsigned noinline_for_stack move_pages_to_lru(struct lruvec *lruvec, spin_lock_irq(&pgdat->lru_lock); } else list_add(&page->lru, &pages_to_free); - } else { - nr_moved += nr_pages; - if (PageActive(page)) - workingset_age_nonresident(lruvec, nr_pages); + + continue; } + + lruvec = mem_cgroup_page_lruvec(page, pgdat); + lru = page_lru(page); + nr_pages = hpage_nr_pages(page); + + update_lru_size(lruvec, lru, page_zonenum(page), nr_pages); + list_add(&page->lru, &lruvec->lists[lru]); + nr_moved += nr_pages; + if (PageActive(page)) + workingset_age_nonresident(lruvec, nr_pages); } /* -- 1.8.3.1
next prev parent reply other threads:[~2020-07-11 0:59 UTC|newest] Thread overview: 125+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-07-11 0:58 [PATCH v16 00/22] per memcg lru_lock Alex Shi 2020-07-11 0:58 ` Alex Shi [this message] 2020-07-11 0:58 ` [PATCH v16 01/22] mm/vmscan: remove unnecessary lruvec adding Alex Shi 2020-07-11 0:58 ` [PATCH v16 02/22] mm/page_idle: no unlikely double check for idle page counting Alex Shi 2020-07-11 0:58 ` [PATCH v16 03/22] mm/compaction: correct the comments of compact_defer_shift Alex Shi 2020-07-11 0:58 ` [PATCH v16 04/22] mm/compaction: rename compact_deferred as compact_should_defer Alex Shi 2020-07-11 0:58 ` Alex Shi 2020-07-11 0:58 ` [PATCH v16 05/22] mm/thp: move lru_add_page_tail func to huge_memory.c Alex Shi 2020-07-16 8:59 ` Alex Shi 2020-07-16 8:59 ` Alex Shi 2020-07-16 13:17 ` Kirill A. Shutemov 2020-07-16 13:17 ` Kirill A. Shutemov 2020-07-17 5:13 ` Alex Shi 2020-07-17 5:13 ` Alex Shi 2020-07-20 8:37 ` Kirill A. Shutemov 2020-07-20 8:37 ` Kirill A. Shutemov 2020-07-11 0:58 ` [PATCH v16 06/22] mm/thp: clean up lru_add_page_tail Alex Shi 2020-07-11 0:58 ` Alex Shi 2020-07-20 8:43 ` Kirill A. Shutemov 2020-07-20 8:43 ` Kirill A. Shutemov 2020-07-11 0:58 ` [PATCH v16 07/22] mm/thp: remove code path which never got into Alex Shi 2020-07-20 8:43 ` Kirill A. Shutemov 2020-07-20 8:43 ` Kirill A. Shutemov 2020-07-11 0:58 ` [PATCH v16 08/22] mm/thp: narrow lru locking Alex Shi 2020-07-11 0:58 ` [PATCH v16 09/22] mm/memcg: add debug checking in lock_page_memcg Alex Shi 2020-07-11 0:58 ` Alex Shi 2020-07-11 0:58 ` [PATCH v16 10/22] mm/swap: fold vm event PGROTATED into pagevec_move_tail_fn Alex Shi 2020-07-11 0:58 ` Alex Shi 2020-07-11 0:58 ` [PATCH v16 11/22] mm/lru: move lru_lock holding in func lru_note_cost_page Alex Shi 2020-07-11 0:58 ` Alex Shi 2020-07-11 0:58 ` [PATCH v16 12/22] mm/lru: move lock into lru_note_cost Alex Shi 2020-07-11 0:58 ` [PATCH v16 13/22] mm/lru: introduce TestClearPageLRU Alex Shi 2020-07-11 0:58 ` Alex Shi 2020-07-16 9:06 ` Alex Shi 2020-07-16 9:06 ` Alex Shi 2020-07-16 21:12 ` Alexander Duyck 2020-07-16 21:12 ` Alexander Duyck 2020-07-16 21:12 ` Alexander Duyck 2020-07-17 7:45 ` Alex Shi 2020-07-17 7:45 ` Alex Shi 2020-07-17 18:26 ` Alexander Duyck 2020-07-17 18:26 ` Alexander Duyck 2020-07-19 4:45 ` Alex Shi 2020-07-19 4:45 ` Alex Shi 2020-07-19 11:24 ` Alex Shi 2020-07-19 11:24 ` Alex Shi 2020-07-11 0:58 ` [PATCH v16 14/22] mm/thp: add tail pages into lru anyway in split_huge_page() Alex Shi 2020-07-11 0:58 ` Alex Shi 2020-07-17 9:30 ` Alex Shi 2020-07-17 9:30 ` Alex Shi 2020-07-20 8:49 ` Kirill A. Shutemov 2020-07-20 8:49 ` Kirill A. Shutemov 2020-07-20 9:04 ` Alex Shi 2020-07-20 9:04 ` Alex Shi 2020-07-11 0:58 ` [PATCH v16 15/22] mm/compaction: do page isolation first in compaction Alex Shi 2020-07-16 21:32 ` Alexander Duyck 2020-07-16 21:32 ` Alexander Duyck 2020-07-16 21:32 ` Alexander Duyck 2020-07-17 5:09 ` Alex Shi 2020-07-17 5:09 ` Alex Shi 2020-07-17 16:09 ` Alexander Duyck 2020-07-17 16:09 ` Alexander Duyck 2020-07-17 16:09 ` Alexander Duyck 2020-07-19 3:59 ` Alex Shi 2020-07-19 3:59 ` Alex Shi 2020-07-11 0:58 ` [PATCH v16 16/22] mm/mlock: reorder isolation sequence during munlock Alex Shi 2020-07-17 20:30 ` Alexander Duyck 2020-07-17 20:30 ` Alexander Duyck 2020-07-17 20:30 ` Alexander Duyck 2020-07-19 3:55 ` Alex Shi 2020-07-19 3:55 ` Alex Shi 2020-07-20 18:51 ` Alexander Duyck 2020-07-20 18:51 ` Alexander Duyck 2020-07-20 18:51 ` Alexander Duyck 2020-07-21 9:26 ` Alex Shi 2020-07-21 9:26 ` Alex Shi 2020-07-21 13:51 ` Alex Shi 2020-07-21 13:51 ` Alex Shi 2020-07-11 0:58 ` [PATCH v16 17/22] mm/swap: serialize memcg changes during pagevec_lru_move_fn Alex Shi 2020-07-11 0:58 ` [PATCH v16 18/22] mm/lru: replace pgdat lru_lock with lruvec lock Alex Shi 2020-07-11 0:58 ` Alex Shi 2020-07-17 21:38 ` Alexander Duyck 2020-07-17 21:38 ` Alexander Duyck 2020-07-17 21:38 ` Alexander Duyck 2020-07-18 14:15 ` Alex Shi 2020-07-19 9:12 ` Alex Shi 2020-07-19 9:12 ` Alex Shi 2020-07-19 15:14 ` Alexander Duyck 2020-07-19 15:14 ` Alexander Duyck 2020-07-19 15:14 ` Alexander Duyck 2020-07-20 5:47 ` Alex Shi 2020-07-20 5:47 ` Alex Shi 2020-07-11 0:58 ` [PATCH v16 19/22] mm/lru: introduce the relock_page_lruvec function Alex Shi 2020-07-11 0:58 ` Alex Shi 2020-07-17 22:03 ` Alexander Duyck 2020-07-17 22:03 ` Alexander Duyck 2020-07-18 14:01 ` Alex Shi 2020-07-11 0:58 ` [PATCH v16 20/22] mm/vmscan: use relock for move_pages_to_lru Alex Shi 2020-07-17 21:44 ` Alexander Duyck 2020-07-17 21:44 ` Alexander Duyck 2020-07-17 21:44 ` Alexander Duyck 2020-07-18 14:15 ` Alex Shi 2020-07-11 0:58 ` [PATCH v16 21/22] mm/pgdat: remove pgdat lru_lock Alex Shi 2020-07-17 21:09 ` Alexander Duyck 2020-07-17 21:09 ` Alexander Duyck 2020-07-18 14:17 ` Alex Shi 2020-07-18 14:17 ` Alex Shi 2020-07-11 0:58 ` [PATCH v16 22/22] mm/lru: revise the comments of lru_lock Alex Shi 2020-07-11 1:02 ` [PATCH v16 00/22] per memcg lru_lock Alex Shi 2020-07-11 1:02 ` Alex Shi 2020-07-16 8:49 ` Alex Shi 2020-07-16 14:11 ` Alexander Duyck 2020-07-16 14:11 ` Alexander Duyck 2020-07-16 14:11 ` Alexander Duyck 2020-07-17 5:24 ` Alex Shi 2020-07-17 5:24 ` Alex Shi 2020-07-19 15:23 ` Hugh Dickins 2020-07-19 15:23 ` Hugh Dickins 2020-07-20 3:01 ` Alex Shi 2020-07-20 3:01 ` Alex Shi 2020-07-20 4:47 ` Hugh Dickins 2020-07-20 4:47 ` Hugh Dickins 2020-07-20 4:47 ` Hugh Dickins 2020-07-20 7:30 ` Alex Shi 2020-07-20 7:30 ` Alex Shi
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