From mboxrd@z Thu Jan 1 00:00:00 1970 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id DDF58C35274 for ; Thu, 21 Dec 2023 04:12:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=+mIMfi2cg2JCSRa4/1/XmJRTGMM/IGvHW9DbDGZQbzE=; b=0YGzcTzLk1sVDf NY9uBhN9p+A4JWQhYdCQ1Xgbdg7cw0PCgMpv1TS0hNVcWwKwF8R8HZB7xGdovGJTnHXeKAVuh77j1 kP3A3BJkfgnqebmqOrkl1vBmCpsh1B4a+Xz3NifV+lIDx4Sa3e8pvEeReqY21MfEzORu3i19VtYfT n/PqdA5PINWcuhEvKQK+VkUOJA7hX9t3yyjhwoTmyPMo5Q0xkdaArybhWdnAz7KYuKtPiltZVw19z yG01wVchmKxQAQYPXpxHwya44VbDcKCjEc4UpbhOyUCL+BbpyS2Rch9+P+gaq/MK+nINLFUSzMQqH B8dHDgx7X7GKplHUD7+A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rGAQS-001epx-2x; Thu, 21 Dec 2023 04:12:48 +0000 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1rGAQP-001epY-36 for kexec@lists.infradead.org; Thu, 21 Dec 2023 04:12:47 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1703131962; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=LYwTBqplqqI5GDQJ4vYImBgIRehExp2gFU18Pdx2r5A=; b=Wo9RKi5bEPXdf1J4jO3NHnYX5tVfS53mGaOavN9UcUgDFWy1v13EZtMLfdphfawunRazZX n+gPes63UrFTnSnk6tuMQV078dhsXH3RfOZ5KC+W2rJ1Zu34ODn9KYchLuRo4PQOEmq8Ol tlBjsWEmbiPdYjo7B/pTnq/dliZ84eQ= Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-346-PbxvE6g8MM-gJ25qgLEakw-1; Wed, 20 Dec 2023 23:12:38 -0500 X-MC-Unique: PbxvE6g8MM-gJ25qgLEakw-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.rdu2.redhat.com [10.11.54.2]) (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 mimecast-mx02.redhat.com (Postfix) with ESMTPS id 2CD242999B21; Thu, 21 Dec 2023 04:12:38 +0000 (UTC) Received: from localhost (unknown [10.72.116.38]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 7503840C6EB9; Thu, 21 Dec 2023 04:12:37 +0000 (UTC) Date: Thu, 21 Dec 2023 12:12:34 +0800 From: Baoquan He To: Huang Shijie Cc: vgoyal@redhat.com, dyoung@redhat.com, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, patches@amperecomputing.com Subject: Re: [PATCH] crash_core: export vmemmap when CONFIG_SPARSEMEM_VMEMMAP is enabled Message-ID: References: <20231127020727.25296-1-shijie@os.amperecomputing.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20231127020727.25296-1-shijie@os.amperecomputing.com> X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.2 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231220_201246_095668_CAB27647 X-CRM114-Status: GOOD ( 15.36 ) X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org On 11/27/23 at 10:07am, Huang Shijie wrote: > In memory_model.h, if CONFIG_SPARSEMEM_VMEMMAP is configed, > kernel will use vmemmap to do the __pfn_to_page/page_to_pfn, > and kernel will not use the "classic sparse" to do the > __pfn_to_page/page_to_pfn. > > So export the vmemmap when CONFIG_SPARSEMEM_VMEMMAP is configed. > This makes the user applications (crash, etc) get faster > pfn_to_page/page_to_pfn operations too. > > Signed-off-by: Huang Shijie > --- > kernel/crash_core.c | 3 +++ > 1 file changed, 3 insertions(+) Ack this one as it's needed by crash utility patches. Acked-by: Baoquan He > > diff --git a/kernel/crash_core.c b/kernel/crash_core.c > index efe87d501c8c..9653c4177191 100644 > --- a/kernel/crash_core.c > +++ b/kernel/crash_core.c > @@ -765,6 +765,9 @@ static int __init crash_save_vmcoreinfo_init(void) > VMCOREINFO_SYMBOL(mem_map); > VMCOREINFO_SYMBOL(contig_page_data); > #endif > +#ifdef CONFIG_SPARSEMEM_VMEMMAP > + VMCOREINFO_SYMBOL_ARRAY(vmemmap); > +#endif > #ifdef CONFIG_SPARSEMEM > VMCOREINFO_SYMBOL_ARRAY(mem_section); > VMCOREINFO_LENGTH(mem_section, NR_SECTION_ROOTS); > -- > 2.40.1 > _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec