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Tsirkin" To: Nico Pache Cc: 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, 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, 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: Re: [RFC 4/5] vmx_balloon: update the NR_BALLOON_PAGES state Message-ID: <20250312025607-mutt-send-email-mst@kernel.org> References: <20250312000700.184573-1-npache@redhat.com> <20250312000700.184573-5-npache@redhat.com> Precedence: bulk X-Mailing-List: linux-hyperv@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250312000700.184573-5-npache@redhat.com> On Tue, Mar 11, 2025 at 06:06:59PM -0600, Nico Pache wrote: > Update the NR_BALLOON_PAGES counter when pages are added to or > removed from the VMware balloon. > > Signed-off-by: Nico Pache > --- > drivers/misc/vmw_balloon.c | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) > > diff --git a/drivers/misc/vmw_balloon.c b/drivers/misc/vmw_balloon.c > index c817d8c21641..2c70b08c6fb3 100644 > --- a/drivers/misc/vmw_balloon.c > +++ b/drivers/misc/vmw_balloon.c > @@ -673,6 +673,8 @@ static int vmballoon_alloc_page_list(struct vmballoon *b, > > vmballoon_stats_page_inc(b, VMW_BALLOON_PAGE_STAT_ALLOC, > ctl->page_size); > + mod_node_page_state(page_pgdat(page), NR_BALLOON_PAGES, > + vmballoon_page_in_frames(ctl->page_size)); same issue as virtio I think - this counts frames not pages. > } > > if (page) { > @@ -915,6 +917,8 @@ static void vmballoon_release_page_list(struct list_head *page_list, > list_for_each_entry_safe(page, tmp, page_list, lru) { > list_del(&page->lru); > __free_pages(page, vmballoon_page_order(page_size)); > + mod_node_page_state(page_pgdat(page), NR_BALLOON_PAGES, > + -vmballoon_page_in_frames(page_size)); > } > > if (n_pages) > @@ -1129,7 +1133,6 @@ static void vmballoon_inflate(struct vmballoon *b) > > /* Update the balloon size */ > atomic64_add(ctl.n_pages * page_in_frames, &b->size); > - unrelated change > vmballoon_enqueue_page_list(b, &ctl.pages, &ctl.n_pages, > ctl.page_size); > > -- > 2.48.1