From nobody Mon Feb 9 07:42:32 2026 Delivered-To: importer@patchew.org Received-SPF: none (zohomail.com: 192.237.175.120 is neither permitted nor denied by domain of lists.xenproject.org) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; spf=none (zohomail.com: 192.237.175.120 is neither permitted nor denied by domain of lists.xenproject.org) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=fail(p=none dis=none) header.from=intel.com ARC-Seal: i=1; a=rsa-sha256; t=1577722387; cv=none; d=zohomail.com; s=zohoarc; b=k1i1VZEuR5AkvJ/rvHptRSbAx6ZshzG+cqXsyITIHKF715XW8qizlv/HErHs9XM/EVHjFcoNGVArQ5+0PMB/s1mqI2uBt302dbzcbSgV/uPiVL1nH0q2a44OEPEQ/4wOoxIvgn4V1ugtaoxwsTRl+79vr5WhQUkphz0YLH6HUNI= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1577722387; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=P4l6l3SyRPDbEQ9L8mchVANpnDGMSQSyF6VUxLLgRJs=; b=IAwGvSKbSURyuFc35FUXPUmYLRuy9J5Y5iYK2wtMq3Nv9CTSj5/+jZZpEMcb5KxFD/IqtDQV93DJVP/HUS6IbSQMoYy/kaHvd74DGMYh4kjyz7kCLei84n2U5J0v99M8PJjM/AceYcPkrwO85u/F/WXm/IHPQvn66WCKinUL9uk= ARC-Authentication-Results: i=1; mx.zohomail.com; spf=none (zohomail.com: 192.237.175.120 is neither permitted nor denied by domain of lists.xenproject.org) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) by mx.zohomail.com with SMTPS id 1577722387011580.3471115528068; Mon, 30 Dec 2019 08:13:07 -0800 (PST) Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1ilxed-0002LY-61; Mon, 30 Dec 2019 16:12:27 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1ilxeb-0002K8-U5 for xen-devel@lists.xenproject.org; Mon, 30 Dec 2019 16:12:25 +0000 Received: from mga14.intel.com (unknown [192.55.52.115]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 1c030c58-2b1f-11ea-a1e1-bc764e2007e4; Mon, 30 Dec 2019 16:12:00 +0000 (UTC) Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 30 Dec 2019 08:11:59 -0800 Received: from tlengyel-mobl2.amr.corp.intel.com (HELO localhost.localdomain) ([10.254.94.206]) by orsmga003.jf.intel.com with ESMTP; 30 Dec 2019 08:11:59 -0800 X-Inumbo-ID: 1c030c58-2b1f-11ea-a1e1-bc764e2007e4 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.69,375,1571727600"; d="scan'208";a="221167354" From: Tamas K Lengyel To: xen-devel@lists.xenproject.org Date: Mon, 30 Dec 2019 08:11:37 -0800 Message-Id: X-Mailer: git-send-email 2.20.1 In-Reply-To: References: MIME-Version: 1.0 Subject: [Xen-devel] [PATCH v3 13/18] x86/mem_sharing: Skip xen heap pages in memshr nominate X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Tamas K Lengyel , Tamas K Lengyel , Wei Liu , George Dunlap , Andrew Cooper , Jan Beulich , =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" Trying to share these would fail anyway, better to skip them early. Signed-off-by: Tamas K Lengyel --- xen/arch/x86/mm/mem_sharing.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/xen/arch/x86/mm/mem_sharing.c b/xen/arch/x86/mm/mem_sharing.c index b8a9228ecf..baa3e35ded 100644 --- a/xen/arch/x86/mm/mem_sharing.c +++ b/xen/arch/x86/mm/mem_sharing.c @@ -852,6 +852,11 @@ static int nominate_page(struct domain *d, gfn_t gfn, if ( !p2m_is_sharable(p2mt) ) goto out; =20 + /* Skip xen heap pages */ + page =3D mfn_to_page(mfn); + if ( !page || is_xen_heap_page(page) ) + goto out; + /* Check if there are mem_access/remapped altp2m entries for this page= */ if ( altp2m_active(d) ) { @@ -882,7 +887,6 @@ static int nominate_page(struct domain *d, gfn_t gfn, } =20 /* Try to convert the mfn to the sharable type */ - page =3D mfn_to_page(mfn); ret =3D page_make_sharable(d, page, expected_refcnt); if ( ret ) goto out; --=20 2.20.1 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel