From patchwork Mon Jan 11 17:42:03 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Olaf Hering X-Patchwork-Id: 12011269 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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,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 1996BC433E0 for ; Mon, 11 Jan 2021 17:43:21 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id CCCC720738 for ; Mon, 11 Jan 2021 17:43:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CCCC720738 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=aepfle.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from list by lists.xenproject.org with outflank-mailman.65122.115386 (Exim 4.92) (envelope-from ) id 1kz1Dk-0003a1-3q; Mon, 11 Jan 2021 17:43:12 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 65122.115386; Mon, 11 Jan 2021 17:43:12 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kz1Dj-0003Zn-Uo; Mon, 11 Jan 2021 17:43:11 +0000 Received: by outflank-mailman (input) for mailman id 65122; Mon, 11 Jan 2021 17:43:10 +0000 Received: from all-amaz-eas1.inumbo.com ([34.197.232.57] helo=us1-amaz-eas2.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kz1Di-0002a6-0W for xen-devel@lists.xenproject.org; Mon, 11 Jan 2021 17:43:10 +0000 Received: from mo4-p03-ob.smtp.rzone.de (unknown [81.169.146.175]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id e4beeb7a-ffbe-4a9c-b3de-c2e05f341f80; Mon, 11 Jan 2021 17:42:42 +0000 (UTC) Received: from sender by smtp.strato.de (RZmta 47.12.1 SBL|AUTH) with ESMTPSA id h0968ex0BHgZM3X (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256 bits)) (Client did not present a certificate); Mon, 11 Jan 2021 18:42:35 +0100 (CET) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: e4beeb7a-ffbe-4a9c-b3de-c2e05f341f80 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1610386961; s=strato-dkim-0002; d=aepfle.de; h=References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:From: Subject:Sender; bh=Njonc8T/80Z53NU5lA96pLqPEcrehrY0+bYK+0WpwhM=; b=M33zzIxUkVuiiaLsUl6OBcqpunXBuBlXxsX3d8kad4Gfu6kA90KNvVaRP8HkItXx5K veli27lY+Pou7k5lEwaErCGVYvFv2LtnVQMDmL9x77xZpf5dnslmmxjnWpV7BqFXMaGs glpfrUN/IYlAFPi9osJld3OMN+VMovk1iKlfizpW+eMX6VhcaZgsLTEMIfQRJdvCCG9+ 2GDX/St7eDAMz1cP1KKlU67+o5cP8LvuQsDpWdDAXaW53MeJtr3XhCDpsGoNdfZw8xAo anyS2Sn2jA4kszwb6IHWDE0obb9ddzuiRmhGLQGYzY/3Yr07sd/E0Ye4+j77W2qhIMn/ 3NeA== X-RZG-AUTH: ":P2EQZWCpfu+qG7CngxMFH1J+3q8wa/QXkBR9MXjAuzBW/OdlBZQ4AHSS2W0g" X-RZG-CLASS-ID: mo00 From: Olaf Hering To: xen-devel@lists.xenproject.org Cc: Olaf Hering , Ian Jackson , Wei Liu , Anthony PERARD Subject: [PATCH v20210111 18/39] tools/guest: save: move errors array Date: Mon, 11 Jan 2021 18:42:03 +0100 Message-Id: <20210111174224.24714-19-olaf@aepfle.de> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210111174224.24714-1-olaf@aepfle.de> References: <20210111174224.24714-1-olaf@aepfle.de> MIME-Version: 1.0 Remove allocation from hotpath, move errors array into preallocated space. Signed-off-by: Olaf Hering --- tools/libs/guest/xg_sr_common.h | 2 ++ tools/libs/guest/xg_sr_save.c | 7 ++----- 2 files changed, 4 insertions(+), 5 deletions(-) diff --git a/tools/libs/guest/xg_sr_common.h b/tools/libs/guest/xg_sr_common.h index 3cbadb607b..71b676c0e0 100644 --- a/tools/libs/guest/xg_sr_common.h +++ b/tools/libs/guest/xg_sr_common.h @@ -217,6 +217,8 @@ struct xc_sr_save_arrays { xen_pfn_t mfns[MAX_BATCH_SIZE]; /* write_batch: Types of the batch pfns. */ xen_pfn_t types[MAX_BATCH_SIZE]; + /* write_batch: Errors from attempting to map the gfns. */ + int errors[MAX_BATCH_SIZE]; }; struct xc_sr_restore_arrays { diff --git a/tools/libs/guest/xg_sr_save.c b/tools/libs/guest/xg_sr_save.c index ff70f62b1e..a1bddd5dcb 100644 --- a/tools/libs/guest/xg_sr_save.c +++ b/tools/libs/guest/xg_sr_save.c @@ -92,7 +92,7 @@ static int write_batch(struct xc_sr_context *ctx) void *guest_mapping = NULL; void **guest_data = NULL; void **local_pages = NULL; - int *errors = NULL, rc = -1; + int *errors = ctx->save.m->errors, rc = -1; unsigned int i, p, nr_pages = 0, nr_pages_mapped = 0; unsigned int nr_pfns = ctx->save.nr_batch_pfns; void *page, *orig_page; @@ -105,8 +105,6 @@ static int write_batch(struct xc_sr_context *ctx) assert(nr_pfns != 0); - /* Errors from attempting to map the gfns. */ - errors = malloc(nr_pfns * sizeof(*errors)); /* Pointers to page data to send. Mapped gfns or local allocations. */ guest_data = calloc(nr_pfns, sizeof(*guest_data)); /* Pointers to locally allocated pages. Need freeing. */ @@ -114,7 +112,7 @@ static int write_batch(struct xc_sr_context *ctx) /* iovec[] for writev(). */ iov = malloc((nr_pfns + 4) * sizeof(*iov)); - if ( !errors || !guest_data || !local_pages || !iov ) + if ( !guest_data || !local_pages || !iov ) { ERROR("Unable to allocate arrays for a batch of %u pages", nr_pfns); @@ -271,7 +269,6 @@ static int write_batch(struct xc_sr_context *ctx) free(iov); free(local_pages); free(guest_data); - free(errors); return rc; }