From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1CC67C433E0 for ; Tue, 2 Jun 2020 04:49:56 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id D4CFE20772 for ; Tue, 2 Jun 2020 04:49:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="Y8N2fBPg" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D4CFE20772 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 787F028003C; Tue, 2 Jun 2020 00:49:51 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 6C03B280012; Tue, 2 Jun 2020 00:49:51 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5B31D28003C; Tue, 2 Jun 2020 00:49:51 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0153.hostedemail.com [216.40.44.153]) by kanga.kvack.org (Postfix) with ESMTP id 3266F280012 for ; Tue, 2 Jun 2020 00:49:51 -0400 (EDT) Received: from smtpin14.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id E810D824805A for ; Tue, 2 Jun 2020 04:49:50 +0000 (UTC) X-FDA: 76883044140.14.brake60_38d5ac4f3da5e Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin14.hostedemail.com (Postfix) with ESMTP id CCD831822987A for ; Tue, 2 Jun 2020 04:49:50 +0000 (UTC) X-HE-Tag: brake60_38d5ac4f3da5e X-Filterd-Recvd-Size: 6742 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf49.hostedemail.com (Postfix) with ESMTP for ; Tue, 2 Jun 2020 04:49:50 +0000 (UTC) Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 69F15206C3; Tue, 2 Jun 2020 04:49:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591073389; bh=2XXtha5xHwq7OZgQBG/Jpq6hfpkykm9NH3kFCDbNxME=; h=Date:From:To:Subject:In-Reply-To:From; b=Y8N2fBPgepgMpnFIH68GJ5OHRDZwDkYcUG5S7TC4M66HfN1awpaNi5egjn78EVms3 UbI8wzvl9TooqYEQsfTr5bRzC4og8bNMGSKXHQuO/W23kd2uKVw0zWbnoJqLhjwZBW Ni+d23eM+iBKcuqBJFnhXLoiNsO6Qy2mYLTfgTkY= Date: Mon, 01 Jun 2020 21:49:49 -0700 From: Andrew Morton To: akpm@linux-foundation.org, chris@chrisdown.name, hannes@cmpxchg.org, hughd@google.com, kuba@kernel.org, linux-mm@kvack.org, mhocko@kernel.org, mm-commits@vger.kernel.org, shakeelb@google.com, tj@kernel.org, torvalds@linux-foundation.org Subject: [patch 081/128] mm/memcg: move cgroup high memory limit setting into struct page_counter Message-ID: <20200602044949.1EocTf-zn%akpm@linux-foundation.org> In-Reply-To: <20200601214457.919c35648e96a2b46b573fe1@linux-foundation.org> User-Agent: s-nail v14.8.16 X-Rspamd-Queue-Id: CCD831822987A X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam01 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Jakub Kicinski Subject: mm/memcg: move cgroup high memory limit setting into struct page_counter High memory limit is currently recorded directly in struct mem_cgroup. We are about to add a high limit for swap, move the field to struct page_counter and add some helpers. Link: http://lkml.kernel.org/r/20200527195846.102707-4-kuba@kernel.org Signed-off-by: Jakub Kicinski Reviewed-by: Shakeel Butt Acked-by: Johannes Weiner Cc: Chris Down Cc: Hugh Dickins Cc: Michal Hocko Cc: Tejun Heo Signed-off-by: Andrew Morton --- include/linux/memcontrol.h | 3 --- include/linux/page_counter.h | 8 ++++++++ mm/memcontrol.c | 19 +++++++++++-------- 3 files changed, 19 insertions(+), 11 deletions(-) --- a/include/linux/memcontrol.h~mm-move-cgroup-high-memory-limit-setting-into-struct-page_counter +++ a/include/linux/memcontrol.h @@ -215,9 +215,6 @@ struct mem_cgroup { struct page_counter kmem; struct page_counter tcpmem; - /* Upper bound of normal memory consumption range */ - unsigned long high; - /* Range enforcement for interrupt charges */ struct work_struct high_work; --- a/include/linux/page_counter.h~mm-move-cgroup-high-memory-limit-setting-into-struct-page_counter +++ a/include/linux/page_counter.h @@ -10,6 +10,7 @@ struct page_counter { atomic_long_t usage; unsigned long min; unsigned long low; + unsigned long high; unsigned long max; struct page_counter *parent; @@ -55,6 +56,13 @@ bool page_counter_try_charge(struct page void page_counter_uncharge(struct page_counter *counter, unsigned long nr_pages); void page_counter_set_min(struct page_counter *counter, unsigned long nr_pages); void page_counter_set_low(struct page_counter *counter, unsigned long nr_pages); + +static inline void page_counter_set_high(struct page_counter *counter, + unsigned long nr_pages) +{ + WRITE_ONCE(counter->high, nr_pages); +} + int page_counter_set_max(struct page_counter *counter, unsigned long nr_pages); int page_counter_memparse(const char *buf, const char *max, unsigned long *nr_pages); --- a/mm/memcontrol.c~mm-move-cgroup-high-memory-limit-setting-into-struct-page_counter +++ a/mm/memcontrol.c @@ -2252,7 +2252,8 @@ static void reclaim_high(struct mem_cgro gfp_t gfp_mask) { do { - if (page_counter_read(&memcg->memory) <= READ_ONCE(memcg->high)) + if (page_counter_read(&memcg->memory) <= + READ_ONCE(memcg->memory.high)) continue; memcg_memory_event(memcg, MEMCG_HIGH); try_to_free_mem_cgroup_pages(memcg, nr_pages, gfp_mask, true); @@ -2345,7 +2346,7 @@ static u64 mem_find_max_overage(struct m do { overage = calculate_overage(page_counter_read(&memcg->memory), - READ_ONCE(memcg->high)); + READ_ONCE(memcg->memory.high)); max_overage = max(overage, max_overage); } while ((memcg = parent_mem_cgroup(memcg)) && !mem_cgroup_is_root(memcg)); @@ -2604,7 +2605,8 @@ done_restock: * reclaim, the cost of mismatch is negligible. */ do { - if (page_counter_read(&memcg->memory) > READ_ONCE(memcg->high)) { + if (page_counter_read(&memcg->memory) > + READ_ONCE(memcg->memory.high)) { /* Don't bother a random interrupted task */ if (in_interrupt()) { schedule_work(&memcg->high_work); @@ -4347,7 +4349,7 @@ void mem_cgroup_wb_stats(struct bdi_writ while ((parent = parent_mem_cgroup(memcg))) { unsigned long ceiling = min(READ_ONCE(memcg->memory.max), - READ_ONCE(memcg->high)); + READ_ONCE(memcg->memory.high)); unsigned long used = page_counter_read(&memcg->memory); *pheadroom = min(*pheadroom, ceiling - min(ceiling, used)); @@ -5072,7 +5074,7 @@ mem_cgroup_css_alloc(struct cgroup_subsy if (IS_ERR(memcg)) return ERR_CAST(memcg); - WRITE_ONCE(memcg->high, PAGE_COUNTER_MAX); + page_counter_set_high(&memcg->memory, PAGE_COUNTER_MAX); memcg->soft_limit = PAGE_COUNTER_MAX; if (parent) { memcg->swappiness = mem_cgroup_swappiness(parent); @@ -5225,7 +5227,7 @@ static void mem_cgroup_css_reset(struct page_counter_set_max(&memcg->tcpmem, PAGE_COUNTER_MAX); page_counter_set_min(&memcg->memory, 0); page_counter_set_low(&memcg->memory, 0); - WRITE_ONCE(memcg->high, PAGE_COUNTER_MAX); + page_counter_set_high(&memcg->memory, PAGE_COUNTER_MAX); memcg->soft_limit = PAGE_COUNTER_MAX; memcg_wb_domain_size_changed(memcg); } @@ -6024,7 +6026,8 @@ static ssize_t memory_low_write(struct k static int memory_high_show(struct seq_file *m, void *v) { - return seq_puts_memcg_tunable(m, READ_ONCE(mem_cgroup_from_seq(m)->high)); + return seq_puts_memcg_tunable(m, + READ_ONCE(mem_cgroup_from_seq(m)->memory.high)); } static ssize_t memory_high_write(struct kernfs_open_file *of, @@ -6041,7 +6044,7 @@ static ssize_t memory_high_write(struct if (err) return err; - WRITE_ONCE(memcg->high, high); + page_counter_set_high(&memcg->memory, high); for (;;) { unsigned long nr_pages = page_counter_read(&memcg->memory); _