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Wed, 12 Mar 2025 00:07:38 +0000 (UTC) Received: from h1.redhat.com (unknown [10.22.88.56]) by mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 3CA451955F0F; Wed, 12 Mar 2025 00:07:30 +0000 (UTC) From: Nico Pache To: linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux.dev, xen-devel@lists.xenproject.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org Cc: kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, jerrin.shaji-george@broadcom.com, bcm-kernel-feedback-list@broadcom.com, arnd@arndb.de, gregkh@linuxfoundation.org, mst@redhat.com, david@redhat.com, jasowang@redhat.com, xuanzhuo@linux.alibaba.com, eperezma@redhat.com, jgross@suse.com, sstabellini@kernel.org, oleksandr_tyshchenko@epam.com, akpm@linux-foundation.org, hannes@cmpxchg.org, mhocko@kernel.org, roman.gushchin@linux.dev, shakeel.butt@linux.dev, muchun.song@linux.dev, nphamcs@gmail.com, yosry.ahmed@linux.dev, kanchana.p.sridhar@intel.com, alexander.atanasov@virtuozzo.com Subject: [RFC 1/5] meminfo: add a per node counter for balloon drivers Date: Tue, 11 Mar 2025 18:06:56 -0600 Message-ID: <20250312000700.184573-2-npache@redhat.com> In-Reply-To: <20250312000700.184573-1-npache@redhat.com> References: <20250312000700.184573-1-npache@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.15 X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: EF2FD1C000B X-Stat-Signature: hipahru11qntnbtytkgigz1a6tr9bcwn X-HE-Tag: 1741738064-418392 X-HE-Meta: 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 z8IqdwAu X/j2xecEtZZSZAaxsDMBrDDSka9N8VFurmlVqvjZMlmnZ9rIBfXsY1bI2hklyxCZ3+nMEoQWV0joFwb+KPR56SDWMr7tJmUoq1nxPS5+KQbKpAU3KtSBnvB6BiP+XbvSHL30XUAkPw0F/noV7nR2s1WBqRGG8wuU92xFVMAYXbUNkAdlMnVtvttdkgyjJXNxBdy3BQGub1O+WbBNbncdgB7PmNRhuTDj7DJd5R7BBf5C7DUB/h/SIA7X/LSce26svGILz97J70whB8u50GkWzssESQsP/twpBN2gMor7NkgPZi/xYODBj5ZsK0fT6w2NlGx/z9aIhZmNfj5I= 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/memcontrol.c | 1 + mm/show_mem.c | 4 +++- mm/vmstat.c | 1 + 5 files changed, 8 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/memcontrol.c b/mm/memcontrol.c index 4de6acb9b8ec..182b44646bfa 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1377,6 +1377,7 @@ static const struct memory_stat memory_stats[] = { #ifdef CONFIG_HUGETLB_PAGE { "hugetlb", NR_HUGETLB }, #endif + { "nr_balloon_pages", NR_BALLOON_PAGES }, /* The memory events */ { "workingset_refault_anon", WORKINGSET_REFAULT_ANON }, 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",