From: Naresh Kamboju <naresh.kamboju@linaro.org>
To: Johannes Weiner <hannes@cmpxchg.org>
Cc: Randy Dunlap <rdunlap@infradead.org>,
Andrew Morton <akpm@linux-foundation.org>,
Mark Brown <broonie@kernel.org>,
linux-fsdevel@vger.kernel.org,
open list <linux-kernel@vger.kernel.org>,
linux-mm <linux-mm@kvack.org>,
Linux-Next Mailing List <linux-next@vger.kernel.org>,
mhocko@suse.cz, mm-commits@vger.kernel.org,
Stephen Rothwell <sfr@canb.auug.org.au>
Subject: Re: mmotm 2020-05-11-15-43 uploaded (mm/memcontrol.c, huge pages)
Date: Tue, 12 May 2020 21:07:15 +0530 [thread overview]
Message-ID: <CA+G9fYvZ1SFX1b7+3_X9L+snPxV_zGHykuDD96Me+gM++BYTBg@mail.gmail.com> (raw)
In-Reply-To: <20200512121750.GA397968@cmpxchg.org>
> The THP page size macros are CONFIG_TRANSPARENT_HUGEPAGE only.
>
> We already ifdef most THP-related code in memcg, but not these
> particular stats. Memcg used to track the pages as they came in, and
> PageTransHuge() + hpage_nr_pages() work when THP is not compiled in.
>
> Switching to native vmstat counters, memcg doesn't see the pages, it
> only gets a count of THPs. To translate that to bytes, it has to know
> how big the THPs are - and that's only available for CONFIG_THP.
>
> Add the necessary ifdefs. /proc/meminfo, smaps etc. also don't show
> the THP counters when the feature is compiled out. The event counts
> (THP_FAULT_ALLOC, THP_COLLAPSE_ALLOC) were already conditional also.
>
> Style touchup: HPAGE_PMD_NR * PAGE_SIZE is silly. Use HPAGE_PMD_SIZE.
Build tested and build pass on x86_64.
>
> Reported-by: Randy Dunlap <rdunlap@infradead.org>
> Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Tested-by: Naresh Kamboju <naresh.kamboju@linaro.org>
> ---
>
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index 738d071ba1ef..47c685088a2c 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -1401,9 +1401,11 @@ static char *memory_stat_format(struct mem_cgroup *memcg)
> (u64)memcg_page_state(memcg, NR_WRITEBACK) *
> PAGE_SIZE);
>
> +#ifdef CONFIG_TRANSPARENT_HUGEPAGE
> seq_buf_printf(&s, "anon_thp %llu\n",
> (u64)memcg_page_state(memcg, NR_ANON_THPS) *
> - HPAGE_PMD_NR * PAGE_SIZE);
> + HPAGE_PMD_SIZE);
> +#endif
>
> for (i = 0; i < NR_LRU_LISTS; i++)
> seq_buf_printf(&s, "%s %llu\n", lru_list_name(i),
> @@ -3752,7 +3754,9 @@ static int memcg_numa_stat_show(struct seq_file *m, void *v)
> static const unsigned int memcg1_stats[] = {
> NR_FILE_PAGES,
> NR_ANON_MAPPED,
> +#ifdef CONFIG_TRANSPARENT_HUGEPAGE
> NR_ANON_THPS,
> +#endif
> NR_SHMEM,
> NR_FILE_MAPPED,
> NR_FILE_DIRTY,
> @@ -3763,7 +3767,9 @@ static const unsigned int memcg1_stats[] = {
> static const char *const memcg1_stat_names[] = {
> "cache",
> "rss",
> +#ifdef CONFIG_TRANSPARENT_HUGEPAGE
> "rss_huge",
> +#endif
> "shmem",
> "mapped_file",
> "dirty",
> @@ -3794,8 +3800,10 @@ static int memcg_stat_show(struct seq_file *m, void *v)
> if (memcg1_stats[i] == MEMCG_SWAP && !do_memsw_account())
> continue;
> nr = memcg_page_state_local(memcg, memcg1_stats[i]);
> +#ifdef CONFIG_TRANSPARENT_HUGEPAGE
> if (memcg1_stats[i] == NR_ANON_THPS)
> nr *= HPAGE_PMD_NR;
> +#endif
> seq_printf(m, "%s %lu\n", memcg1_stat_names[i], nr * PAGE_SIZE);
> }
>
--
Linaro LKFT
https://lkft.linaro.org
next prev parent reply other threads:[~2020-05-12 15:37 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-08 1:35 incoming Andrew Morton
2020-05-08 1:35 ` [patch 01/15] ipc/mqueue.c: change __do_notify() to bypass check_kill_permission() Andrew Morton
2020-05-08 1:35 ` [patch 02/15] mm, memcg: fix error return value of mem_cgroup_css_alloc() Andrew Morton
2020-05-08 1:35 ` [patch 03/15] mm/page_alloc: fix watchdog soft lockups during set_zone_contiguous() Andrew Morton
2020-05-08 1:35 ` [patch 04/15] kernel/kcov.c: fix typos in kcov_remote_start documentation Andrew Morton
2020-05-08 1:35 ` [patch 05/15] scripts/decodecode: fix trapping instruction formatting Andrew Morton
2020-05-08 1:35 ` [patch 06/15] arch/x86/kvm/svm/sev.c: change flag passed to GUP fast in sev_pin_memory() Andrew Morton
2020-05-08 1:35 ` [patch 07/15] eventpoll: fix missing wakeup for ovflist in ep_poll_callback Andrew Morton
2020-05-08 1:36 ` [patch 08/15] scripts/gdb: repair rb_first() and rb_last() Andrew Morton
2020-05-08 1:36 ` [patch 09/15] mm/slub: fix incorrect interpretation of s->offset Andrew Morton
2020-05-08 1:36 ` [patch 10/15] percpu: make pcpu_alloc() aware of current gfp context Andrew Morton
2020-05-08 1:36 ` [patch 11/15] kselftests: introduce new epoll60 testcase for catching lost wakeups Andrew Morton
2020-05-08 1:36 ` [patch 12/15] epoll: atomically remove wait entry on wake up Andrew Morton
2020-05-08 1:36 ` [patch 13/15] mm/vmscan: remove unnecessary argument description of isolate_lru_pages() Andrew Morton
2020-05-08 1:36 ` [patch 14/15] ubsan: disable UBSAN_ALIGNMENT under COMPILE_TEST Andrew Morton
2020-05-08 1:36 ` [patch 15/15] mm: limit boost_watermark on small zones Andrew Morton
2020-05-11 22:44 ` mmotm 2020-05-11-15-43 uploaded Andrew Morton
2020-05-12 2:12 ` mmotm 2020-05-11-15-43 uploaded (ethernet/ti/ti_cpsw) Randy Dunlap
2020-05-13 9:20 ` Grygorii Strashko
2020-05-13 15:18 ` Randy Dunlap
2020-05-12 4:41 ` mmotm 2020-05-11-15-43 uploaded (mm/memcontrol.c, huge pages) Randy Dunlap
2020-05-12 12:17 ` Johannes Weiner
2020-05-12 15:27 ` Randy Dunlap
2020-05-12 15:37 ` Naresh Kamboju [this message]
2020-05-12 17:16 ` Geert Uytterhoeven
2020-05-12 15:11 ` Geert Uytterhoeven
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