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 02672C48BF6 for ; Mon, 26 Feb 2024 19:10:45 +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:Mime-Version:References:In-Reply-To: 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=/JsNNjW3SgRXP4FGRZr2FD9hSvo7vwErw/5ewGFd/jY=; b=HNNo5pBQs1bqZy +xgXfOsP/oJpiYCZmvhHE/Hi5fORNPppzUrbEyu+SPTKFeMy+XhuQJdRvuKbBe8kJ8QEm8vTJAQnQ hqBFBsyCKgks2XzJ4rYkPnjYgvEAtC5CBf3xk0BNBBRJohhaRDtAB+TO3ulInKXCBsJ48GZ/zlYtT Jjx3PKa/oKlpHpJ2zC+ReEIR4v+zez0sWxR8LKtAc4U97NUEnUc486i164ohZOMkmWOV+nTPEBLQ8 pkgf0j+i1H6zAUmGCB7pAyvaAv2BCAnyvej0/jMAM8JQa9QMhE5vnb1MfBFdssPeHkhT+DWQcoInp Bh7Gkr9rXEi3py2r42XQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1regNA-00000002KHi-07mo; Mon, 26 Feb 2024 19:10:44 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1regN5-00000002KGt-2348 for kexec@lists.infradead.org; Mon, 26 Feb 2024 19:10:40 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id A5CE7612DC; Mon, 26 Feb 2024 19:10:38 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C885DC433F1; Mon, 26 Feb 2024 19:10:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1708974638; bh=Q8kPJtYHk31pouePvzRSVpdUlZrGVNhgF7qIYjO68v4=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=d/H/EtMIF5j8Idssk8RxnYd22THuWd4EEoIOthl/LQv2e+rMTbCQg8TRIKqVNbSyp P2bTi302j/4k3dle+SB6NnzxNHA4RDE/xC+3MxD/o8CtVaBxCuCr7VQyVkHjSBbfgF +1pL4pm8YWk74NTf6HuTGHTXrcrV+fUMGB42LeQU= Date: Mon, 26 Feb 2024 11:10:37 -0800 From: Andrew Morton To: Huang Shijie Cc: bhe@redhat.com, patches@amperecomputing.com, vgoyal@redhat.com, dyoung@redhat.com, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, k-hagio-ab@nec.com, lijiang@redhat.com Subject: Re: [PATCH RESEND] crash_core: export vmemmap when CONFIG_SPARSEMEM_VMEMMAP is enabled Message-Id: <20240226111037.d76d299db1b26673b876e83a@linux-foundation.org> In-Reply-To: <20240226020433.3353-1-shijie@os.amperecomputing.com> References: <20240226020433.3353-1-shijie@os.amperecomputing.com> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240226_111039_607468_AADF7CFA X-CRM114-Status: GOOD ( 10.69 ) 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 Mon, 26 Feb 2024 10:04:33 +0800 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. This is significantly out of sync with development trees. Please take a look at linux-next and redo the patch if still needed? _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec