From patchwork Fri Mar 5 12:20:23 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 394437 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F2E3AC4332E for ; Fri, 5 Mar 2021 12:28:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DDDBB65040 for ; Fri, 5 Mar 2021 12:28:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229848AbhCEM2b (ORCPT ); Fri, 5 Mar 2021 07:28:31 -0500 Received: from mail.kernel.org ([198.145.29.99]:36702 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231931AbhCEM2H (ORCPT ); Fri, 5 Mar 2021 07:28:07 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id E239D65035; Fri, 5 Mar 2021 12:28:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1614947287; bh=Xgy4NCA67+GfBymP3+F3xB7Abwlcvf9yCQhokQ4A9Lw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tNef2fT3hRlLJDqahq1/RUCWZ9l80NXeUcgq78ji508TX4c6EppzlyhBNz+NctwOd TlbZW5X+JZUxHrtVjqgJqdHGyS067CPexJOBWhhB217tw1yXc/D6sEyTUfwofniJRz nNNGcl6K4+5lByEh7nXOhzqtGcoEIntwKCmlA/lk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Sergey Senozhatsky , Gerd Hoffmann , Doug Horn Subject: [PATCH 5.10 004/102] drm/virtio: use kvmalloc for large allocations Date: Fri, 5 Mar 2021 13:20:23 +0100 Message-Id: <20210305120903.495591839@linuxfoundation.org> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210305120903.276489876@linuxfoundation.org> References: <20210305120903.276489876@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Sergey Senozhatsky commit ea86f3defd55f141a44146e66cbf8ffb683d60da upstream. We observed that some of virtio_gpu_object_shmem_init() allocations can be rather costly - order 6 - which can be difficult to fulfill under memory pressure conditions. Switch to kvmalloc_array() in virtio_gpu_object_shmem_init() and let the kernel vmalloc the entries array. Signed-off-by: Sergey Senozhatsky Link: http://patchwork.freedesktop.org/patch/msgid/20201105014744.1662226-1-senozhatsky@chromium.org Signed-off-by: Gerd Hoffmann Signed-off-by: Doug Horn Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/virtio/virtgpu_object.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) --- a/drivers/gpu/drm/virtio/virtgpu_object.c +++ b/drivers/gpu/drm/virtio/virtgpu_object.c @@ -172,8 +172,9 @@ static int virtio_gpu_object_shmem_init( *nents = shmem->pages->orig_nents; } - *ents = kmalloc_array(*nents, sizeof(struct virtio_gpu_mem_entry), - GFP_KERNEL); + *ents = kvmalloc_array(*nents, + sizeof(struct virtio_gpu_mem_entry), + GFP_KERNEL); if (!(*ents)) { DRM_ERROR("failed to allocate ent list\n"); return -ENOMEM;