From patchwork Wed Mar 12 00:07:00 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nico Pache X-Patchwork-Id: 14012762 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8D03F12E7F for ; Wed, 12 Mar 2025 00:08:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741738098; cv=none; b=Jjsg+mITjVblbo37UhDeYwHWEsDcsIIYeci1GkeslWsu2wwwNFaC+eAjgFz87Q4DbW40LgdH83JEzAoyZh2NgdVCBtybr5aX9piwAs1kJ48Ufxyp9vSfj5srWFthx2u/0YVliIfJycXduv4bmD6ThrGM+2NO0SSS+NTB0WEmAfI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741738098; c=relaxed/simple; bh=7JAKR1B2EJs5OMc3kDKDyMYaNnMBEQeVe+0pTH470+w=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=qmT3pFz8MUW2cHrBzg2BUsLJ5sl5mXmDfOahPkWMzZi1hkhNE82MIcDVGUZMHwhZsgzzEiJWhR1rpw/ksEVjIcoZRiX6BBEYZIHf/qE1nPR5iXABRZ4VT3igYigl/5LBrW8qtuRmAb+cbt2qIJ4bBzSO8fpUwHJZ7qnaIS7QrfE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=BAXKzrVa; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="BAXKzrVa" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1741738095; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=dGPxM9RdXtkX+Els8nvXOJm60GkYwZd/fztNUeVaxvI=; b=BAXKzrVa2UcUeyKCZ60+1DRsaTld9aBR8Qpq5KfsblfeaYGCE8RjDZTpHax+2gM57G9mlM SISiVEsYhVcPpbjqFECaXls9LejjtX6Jpp1Huwc3nMFdfX/bP1wnDHpXx+UGrKgtdFdKXV zQU9O7yKEE754tkHDlmc87rKkMa9ZeI= Received: from mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-687-a_RbZen0O8GYnddRn1Kahg-1; Tue, 11 Mar 2025 20:08:11 -0400 X-MC-Unique: a_RbZen0O8GYnddRn1Kahg-1 X-Mimecast-MFC-AGG-ID: a_RbZen0O8GYnddRn1Kahg_1741738088 Received: from mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.15]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 942B7180AF4C; Wed, 12 Mar 2025 00:08:07 +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 B44AA1955DDD; Wed, 12 Mar 2025 00:08:00 +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 5/5] xen: balloon: update the NR_BALLOON_PAGES state Date: Tue, 11 Mar 2025 18:07:00 -0600 Message-ID: <20250312000700.184573-6-npache@redhat.com> In-Reply-To: <20250312000700.184573-1-npache@redhat.com> References: <20250312000700.184573-1-npache@redhat.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.15 Update the NR_BALLOON_PAGES counter when pages are added to or removed from the Xen balloon. Signed-off-by: Nico Pache --- drivers/xen/balloon.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c index 163f7f1d70f1..65d4e7fa1eb8 100644 --- a/drivers/xen/balloon.c +++ b/drivers/xen/balloon.c @@ -157,6 +157,8 @@ static void balloon_append(struct page *page) list_add(&page->lru, &ballooned_pages); balloon_stats.balloon_low++; } + inc_node_page_state(page, NR_BALLOON_PAGES); + wake_up(&balloon_wq); } @@ -179,6 +181,8 @@ static struct page *balloon_retrieve(bool require_lowmem) balloon_stats.balloon_low--; __ClearPageOffline(page); + dec_node_page_state(page, NR_BALLOON_PAGES); + return page; }