Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1BF03C433FE for ; Mon, 15 Nov 2021 20:21:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0393363243 for ; Mon, 15 Nov 2021 20:21:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350265AbhKOUXB (ORCPT ); Mon, 15 Nov 2021 15:23:01 -0500 Received: from mail.kernel.org ([198.145.29.99]:46100 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240093AbhKOSFf (ORCPT ); Mon, 15 Nov 2021 13:05:35 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 34CC76326D; Mon, 15 Nov 2021 17:42:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1636998132; bh=d1W/Mm5qqz722Rug1BmUtJM4GClARRRIRgfA+Tjtgoo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OSEhmog2l2s3MiUwewegUN00xk5u6LTDcDvPFzSfOqXM6CRp05z0Ls1/OmUk9jLWs WKJ5Oh8j4pVSr/NxTMPuyqj32qyGBauZAGcmYRpSnx1j40yAFY0tX7CukmRdAur1tl MuCSmGawUFtzFT/o92oyWeHS2VKDJ7YLzAVWH9CM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Claudio Imbrenda , Christian Borntraeger , Janosch Frank , Sasha Levin Subject: [PATCH 5.10 356/575] KVM: s390: pv: avoid stalls for kvm_s390_pv_init_vm Date: Mon, 15 Nov 2021 18:01:21 +0100 Message-Id: <20211115165356.117773956@linuxfoundation.org> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211115165343.579890274@linuxfoundation.org> References: <20211115165343.579890274@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Claudio Imbrenda [ Upstream commit 1e2aa46de526a5adafe580bca4c25856bb06f09e ] When the system is heavily overcommitted, kvm_s390_pv_init_vm might generate stall notifications. Fix this by using uv_call_sched instead of just uv_call. This is ok because we are not holding spinlocks. Signed-off-by: Claudio Imbrenda Fixes: 214d9bbcd3a672 ("s390/mm: provide memory management functions for protected KVM guests") Reviewed-by: Christian Borntraeger Reviewed-by: Janosch Frank Message-Id: <20210920132502.36111-4-imbrenda@linux.ibm.com> Signed-off-by: Janosch Frank Signed-off-by: Christian Borntraeger Signed-off-by: Sasha Levin --- arch/s390/kvm/pv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/s390/kvm/pv.c b/arch/s390/kvm/pv.c index 74265304dd9cd..8228878872228 100644 --- a/arch/s390/kvm/pv.c +++ b/arch/s390/kvm/pv.c @@ -190,7 +190,7 @@ int kvm_s390_pv_init_vm(struct kvm *kvm, u16 *rc, u16 *rrc) uvcb.conf_base_stor_origin = (u64)kvm->arch.pv.stor_base; uvcb.conf_virt_stor_origin = (u64)kvm->arch.pv.stor_var; - cc = uv_call(0, (u64)&uvcb); + cc = uv_call_sched(0, (u64)&uvcb); *rc = uvcb.header.rc; *rrc = uvcb.header.rrc; KVM_UV_EVENT(kvm, 3, "PROTVIRT CREATE VM: handle %llx len %llx rc %x rrc %x", -- 2.33.0