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Fri, 14 Mar 2025 21:38:17 +0000 (UTC) Received: from h1.redhat.com (unknown [10.22.80.88]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id B05D41944DC5; Fri, 14 Mar 2025 21:38:11 +0000 (UTC) From: Nico Pache To: linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, virtualization@lists.linux.dev Cc: alexander.atanasov@virtuozzo.com, muchun.song@linux.dev, roman.gushchin@linux.dev, mhocko@kernel.org, kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, jgross@suse.com, sstabellini@kernel.org, oleksandr_tyshchenko@epam.com, akpm@linux-foundation.org, mst@redhat.com, david@redhat.com, yosry.ahmed@linux.dev, hannes@cmpxchg.org, nphamcs@gmail.com, chengming.zhou@linux.dev, kanchana.p.sridhar@intel.com, llong@redhat.com, shakeel.butt@linux.dev Subject: [PATCH v2 1/4] meminfo: add a per node counter for balloon drivers Date: Fri, 14 Mar 2025 15:37:54 -0600 Message-ID: <20250314213757.244258-2-npache@redhat.com> In-Reply-To: <20250314213757.244258-1-npache@redhat.com> References: <20250314213757.244258-1-npache@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 X-Stat-Signature: cuc96465hyp9yme1s4sggzt4po4h9eni X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 2A77F1C0005 X-Rspam-User: X-HE-Tag: 1741988305-420814 X-HE-Meta: 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 SSEjhfjB 2HZ06k5gNgs45gmFDKkl7jtt6pCRh3NwfEHW9xSjY2vG6oXmgW9OrF7uZsg== 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: List-Subscribe: List-Unsubscribe: Add NR_BALLOON_PAGES counter to track memory used by balloon drivers and expose it through /proc/meminfo and other memory reporting interfaces. Signed-off-by: Nico Pache --- fs/proc/meminfo.c | 2 ++ include/linux/mmzone.h | 1 + mm/show_mem.c | 4 +++- mm/vmstat.c | 1 + 4 files changed, 7 insertions(+), 1 deletion(-) diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c index 8ba9b1472390..83be312159c9 100644 --- a/fs/proc/meminfo.c +++ b/fs/proc/meminfo.c @@ -162,6 +162,8 @@ static int meminfo_proc_show(struct seq_file *m, void *v) show_val_kb(m, "Unaccepted: ", global_zone_page_state(NR_UNACCEPTED)); #endif + show_val_kb(m, "Balloon: ", + global_node_page_state(NR_BALLOON_PAGES)); hugetlb_report_meminfo(m); diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 9540b41894da..71d3ff19267a 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -223,6 +223,7 @@ enum node_stat_item { #ifdef CONFIG_HUGETLB_PAGE NR_HUGETLB, #endif + NR_BALLOON_PAGES, NR_VM_NODE_STAT_ITEMS }; diff --git a/mm/show_mem.c b/mm/show_mem.c index 43afb56abbd3..6af13bcd2ab3 100644 --- a/mm/show_mem.c +++ b/mm/show_mem.c @@ -260,6 +260,7 @@ static void show_free_areas(unsigned int filter, nodemask_t *nodemask, int max_z " pagetables:%lukB" " sec_pagetables:%lukB" " all_unreclaimable? %s" + " Balloon:%lukB" "\n", pgdat->node_id, K(node_page_state(pgdat, NR_ACTIVE_ANON)), @@ -285,7 +286,8 @@ static void show_free_areas(unsigned int filter, nodemask_t *nodemask, int max_z #endif K(node_page_state(pgdat, NR_PAGETABLE)), K(node_page_state(pgdat, NR_SECONDARY_PAGETABLE)), - str_yes_no(pgdat->kswapd_failures >= MAX_RECLAIM_RETRIES)); + str_yes_no(pgdat->kswapd_failures >= MAX_RECLAIM_RETRIES), + K(node_page_state(pgdat, NR_BALLOON_PAGES))); } for_each_populated_zone(zone) { diff --git a/mm/vmstat.c b/mm/vmstat.c index 16bfe1c694dd..d3b11891a942 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -1276,6 +1276,7 @@ const char * const vmstat_text[] = { #ifdef CONFIG_HUGETLB_PAGE "nr_hugetlb", #endif + "nr_balloon_pages", /* system-wide enum vm_stat_item counters */ "nr_dirty_threshold", "nr_dirty_background_threshold",