From: Hugh Dickins <hughd@google.com> To: Alex Shi <alex.shi@linux.alibaba.com> Cc: Hugh Dickins <hughd@google.com>, Alexander Duyck <alexander.duyck@gmail.com>, Andrew Morton <akpm@linux-foundation.org>, Mel Gorman <mgorman@techsingularity.net>, Tejun Heo <tj@kernel.org>, Konstantin Khlebnikov <khlebnikov@yandex-team.ru>, Daniel Jordan <daniel.m.jordan@oracle.com>, Yang Shi <yang.shi@linux.alibaba.com>, Matthew Wilcox <willy@infradead.org>, Johannes Weiner <hannes@cmpxchg.org>, kbuild test robot <lkp@intel.com>, linux-mm <linux-mm@kvack.org>, LKML <linux-kernel@vger.kernel.org>, cgroups@vger.kernel.org, Shakeel Butt <shakeelb@google.com>, Joonsoo Kim <iamjoonsoo.kim@lge.com>, Wei Yang <richard.weiyang@gmail.com>, "Kirill A. Shutemov" <kirill@shutemov.name> Subject: Re: [PATCH v16 00/22] per memcg lru_lock Date: Sun, 19 Jul 2020 21:47:49 -0700 (PDT) [thread overview] Message-ID: <alpine.LSU.2.11.2007192144150.1478@eggly.anvils> (raw) In-Reply-To: <5f2401d3-dd4f-cbc6-8cb4-4e92fc64998c@linux.alibaba.com> [-- Attachment #1: Type: TEXT/PLAIN, Size: 1420 bytes --] On Mon, 20 Jul 2020, Alex Shi wrote: > 在 2020/7/19 下午11:23, Hugh Dickins 写道: > > I noticed that 5.8-rc5, with lrulock v16 applied, took significantly > > longer to run loads than without it applied, when there should have been > > only slight differences in system time. Comparing /proc/vmstat, something > > that stood out was "pgrotated 0" for the patched kernels, which led here: > > > > If pagevec_lru_move_fn() is now to TestClearPageLRU (I have still not > > decided whether that's good or not, but assume here that it is good), > > then functions called though it must be changed not to expect PageLRU! > > > > Signed-off-by: Hugh Dickins <hughd@google.com> > > Good catch! > > Thanks a lot, Hugh! > except 6 changes should apply, looks we add one more in swap.c file to stop > !PageRLU further actions! Agreed, that's a minor optimization that wasn't done before, that can be added (but it's not a fix like the rest of them). > > Many Thanks! > Alex > > @@ -649,7 +647,7 @@ void deactivate_file_page(struct page *page) > * In a workload with many unevictable page such as mprotect, > * unevictable page deactivation for accelerating reclaim is pointless. > */ > - if (PageUnevictable(page)) > + if (PageUnevictable(page) || !PageLRU(page)) > return; > > if (likely(get_page_unless_zero(page))) {
WARNING: multiple messages have this Message-ID (diff)
From: Hugh Dickins <hughd-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org> To: Alex Shi <alex.shi-KPsoFbNs7GizrGE5bRqYAgC/G2K4zDHf@public.gmane.org> Cc: Hugh Dickins <hughd-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>, Alexander Duyck <alexander.duyck-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, Andrew Morton <akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>, Mel Gorman <mgorman-3eNAlZScCAx27rWaFMvyedHuzzzSOjJt@public.gmane.org>, Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>, Konstantin Khlebnikov <khlebnikov-XoJtRXgx1JseBXzfvpsJ4g@public.gmane.org>, Daniel Jordan <daniel.m.jordan-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>, Yang Shi <yang.shi-KPsoFbNs7GizrGE5bRqYAgC/G2K4zDHf@public.gmane.org>, Matthew Wilcox <willy-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>, Johannes Weiner <hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>, kbuild test robot <lkp-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>, linux-mm <linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org>, LKML <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Shakeel Butt <shakeelb-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>, Joonsoo Kim <iamjoonsoo.kim-Hm3cg6mZ9cc@public.gmane.org>, Wei Yang <richard.weiyang-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, "Kirill A. Shutemov" <kirill-oKw7cIdHH8eLwutG50LtGA@public.gmane.org> Subject: Re: [PATCH v16 00/22] per memcg lru_lock Date: Sun, 19 Jul 2020 21:47:49 -0700 (PDT) [thread overview] Message-ID: <alpine.LSU.2.11.2007192144150.1478@eggly.anvils> (raw) In-Reply-To: <5f2401d3-dd4f-cbc6-8cb4-4e92fc64998c-KPsoFbNs7GizrGE5bRqYAgC/G2K4zDHf@public.gmane.org> [-- Attachment #1: Type: TEXT/PLAIN, Size: 1449 bytes --] On Mon, 20 Jul 2020, Alex Shi wrote: > 在 2020/7/19 下午11:23, Hugh Dickins 写道: > > I noticed that 5.8-rc5, with lrulock v16 applied, took significantly > > longer to run loads than without it applied, when there should have been > > only slight differences in system time. Comparing /proc/vmstat, something > > that stood out was "pgrotated 0" for the patched kernels, which led here: > > > > If pagevec_lru_move_fn() is now to TestClearPageLRU (I have still not > > decided whether that's good or not, but assume here that it is good), > > then functions called though it must be changed not to expect PageLRU! > > > > Signed-off-by: Hugh Dickins <hughd-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org> > > Good catch! > > Thanks a lot, Hugh! > except 6 changes should apply, looks we add one more in swap.c file to stop > !PageRLU further actions! Agreed, that's a minor optimization that wasn't done before, that can be added (but it's not a fix like the rest of them). > > Many Thanks! > Alex > > @@ -649,7 +647,7 @@ void deactivate_file_page(struct page *page) > * In a workload with many unevictable page such as mprotect, > * unevictable page deactivation for accelerating reclaim is pointless. > */ > - if (PageUnevictable(page)) > + if (PageUnevictable(page) || !PageLRU(page)) > return; > > if (likely(get_page_unless_zero(page))) {
next prev parent reply other threads:[~2020-07-20 4:48 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 ` [PATCH v16 01/22] mm/vmscan: remove unnecessary lruvec adding Alex Shi 2020-07-11 0:58 ` 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 [this message] 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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