From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: From: Mike Rapoport Subject: [PATCH 2/9] arc: update comment about HIGHMEM implementation Date: Wed, 2 Jun 2021 13:53:41 +0300 Message-Id: <20210602105348.13387-3-rppt@kernel.org> In-Reply-To: <20210602105348.13387-1-rppt@kernel.org> References: <20210602105348.13387-1-rppt@kernel.org> MIME-Version: 1.0 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+dwmw2=infradead.org@lists.infradead.org To: Andrew Morton Cc: Arnd Bergmann , Geert Uytterhoeven , Ivan Kokshaysky , Jonathan Corbet , Matt Turner , Mike Rapoport , Mike Rapoport , Richard Henderson , Vineet Gupta , kexec@lists.infradead.org, linux-alpha@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-mm@kvack.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-xtensa@linux-xtensa.org, linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org From: Mike Rapoport Arc does not use DISCONTIGMEM to implement high memory, update the comment describing how high memory works to reflect this. Signed-off-by: Mike Rapoport --- arch/arc/mm/init.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c index e2ed355438c9..397a201adfe3 100644 --- a/arch/arc/mm/init.c +++ b/arch/arc/mm/init.c @@ -139,16 +139,13 @@ void __init setup_arch_memory(void) #ifdef CONFIG_HIGHMEM /* - * Populate a new node with highmem - * * On ARC (w/o PAE) HIGHMEM addresses are actually smaller (0 based) - * than addresses in normal ala low memory (0x8000_0000 based). + * than addresses in normal aka low memory (0x8000_0000 based). * Even with PAE, the huge peripheral space hole would waste a lot of - * mem with single mem_map[]. This warrants a mem_map per region design. - * Thus HIGHMEM on ARC is imlemented with DISCONTIGMEM. - * - * DISCONTIGMEM in turns requires multiple nodes. node 0 above is - * populated with normal memory zone while node 1 only has highmem + * mem with single contiguous mem_map[]. + * Thus when HIGHMEM on ARC is enabled the memory map corresponding + * to the hole is freed and ARC specific version of pfn_valid() + * handles the hole in the memory map. */ #ifdef CONFIG_DISCONTIGMEM node_set_online(1); -- 2.28.0 _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Rapoport Subject: [PATCH 2/9] arc: update comment about HIGHMEM implementation Date: Wed, 2 Jun 2021 13:53:41 +0300 Message-ID: <20210602105348.13387-3-rppt@kernel.org> References: <20210602105348.13387-1-rppt@kernel.org> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1622631253; bh=M0bKVaGHx9OxuQ1E9oxHVBUkdvBwvAMGJJiXepUaSFE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NZQ2rr2E/OctHk1XnG/C5vLVoo2DWWNRKDUphu7Fh35eCKk7WRb+E/oZ1QWpjns4n 483dCoOUenIqXs2GkrV7dD0CBQudFaPjtEpqVBzYDkYbv3dPEwgvpFNS1sK8Qm2M5h dfPcSWwLtEgixqKEsihdQBlQLPat/EiAfVdcN+PKy/jPFrwO4GBJW17FhoiRnP5FE/ LjACmzvLPl6AQjzug1qGPe7CVpkPamqtdaxLDkkdyw7FIplstRB17LG7WMeV+G4ZvT AznPR6UfbTW4ZrJ8sIkP2lNwVl5gX3ybDLO4yKMbiW88ZJjTyFtboulTH3d2QuUriT IjqRNXEinP8RQ== In-Reply-To: <20210602105348.13387-1-rppt@kernel.org> List-ID: Content-Type: text/plain; charset="us-ascii" To: Andrew Morton Cc: Arnd Bergmann , Geert Uytterhoeven , Ivan Kokshaysky , Jonathan Corbet , Matt Turner , Mike Rapoport , Mike Rapoport , Richard Henderson , Vineet Gupta , kexec@lists.infradead.org, linux-alpha@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-mm@kvack.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-xtensa@linux-xtensa.org From: Mike Rapoport Arc does not use DISCONTIGMEM to implement high memory, update the comment describing how high memory works to reflect this. Signed-off-by: Mike Rapoport --- arch/arc/mm/init.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c index e2ed355438c9..397a201adfe3 100644 --- a/arch/arc/mm/init.c +++ b/arch/arc/mm/init.c @@ -139,16 +139,13 @@ void __init setup_arch_memory(void) #ifdef CONFIG_HIGHMEM /* - * Populate a new node with highmem - * * On ARC (w/o PAE) HIGHMEM addresses are actually smaller (0 based) - * than addresses in normal ala low memory (0x8000_0000 based). + * than addresses in normal aka low memory (0x8000_0000 based). * Even with PAE, the huge peripheral space hole would waste a lot of - * mem with single mem_map[]. This warrants a mem_map per region design. - * Thus HIGHMEM on ARC is imlemented with DISCONTIGMEM. - * - * DISCONTIGMEM in turns requires multiple nodes. node 0 above is - * populated with normal memory zone while node 1 only has highmem + * mem with single contiguous mem_map[]. + * Thus when HIGHMEM on ARC is enabled the memory map corresponding + * to the hole is freed and ARC specific version of pfn_valid() + * handles the hole in the memory map. */ #ifdef CONFIG_DISCONTIGMEM node_set_online(1); -- 2.28.0 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 X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 11C1DC47092 for ; Wed, 2 Jun 2021 10:54:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EAFA8613D7 for ; Wed, 2 Jun 2021 10:54:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231990AbhFBK4F (ORCPT ); Wed, 2 Jun 2021 06:56:05 -0400 Received: from mail.kernel.org ([198.145.29.99]:38546 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231848AbhFBKzz (ORCPT ); Wed, 2 Jun 2021 06:55:55 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id F3015613D2; Wed, 2 Jun 2021 10:54:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1622631253; bh=M0bKVaGHx9OxuQ1E9oxHVBUkdvBwvAMGJJiXepUaSFE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NZQ2rr2E/OctHk1XnG/C5vLVoo2DWWNRKDUphu7Fh35eCKk7WRb+E/oZ1QWpjns4n 483dCoOUenIqXs2GkrV7dD0CBQudFaPjtEpqVBzYDkYbv3dPEwgvpFNS1sK8Qm2M5h dfPcSWwLtEgixqKEsihdQBlQLPat/EiAfVdcN+PKy/jPFrwO4GBJW17FhoiRnP5FE/ LjACmzvLPl6AQjzug1qGPe7CVpkPamqtdaxLDkkdyw7FIplstRB17LG7WMeV+G4ZvT AznPR6UfbTW4ZrJ8sIkP2lNwVl5gX3ybDLO4yKMbiW88ZJjTyFtboulTH3d2QuUriT IjqRNXEinP8RQ== From: Mike Rapoport To: Andrew Morton Cc: Arnd Bergmann , Geert Uytterhoeven , Ivan Kokshaysky , Jonathan Corbet , Matt Turner , Mike Rapoport , Mike Rapoport , Richard Henderson , Vineet Gupta , kexec@lists.infradead.org, linux-alpha@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-mm@kvack.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-xtensa@linux-xtensa.org, linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org Subject: [PATCH 2/9] arc: update comment about HIGHMEM implementation Date: Wed, 2 Jun 2021 13:53:41 +0300 Message-Id: <20210602105348.13387-3-rppt@kernel.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20210602105348.13387-1-rppt@kernel.org> References: <20210602105348.13387-1-rppt@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-arch@vger.kernel.org From: Mike Rapoport Arc does not use DISCONTIGMEM to implement high memory, update the comment describing how high memory works to reflect this. Signed-off-by: Mike Rapoport --- arch/arc/mm/init.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c index e2ed355438c9..397a201adfe3 100644 --- a/arch/arc/mm/init.c +++ b/arch/arc/mm/init.c @@ -139,16 +139,13 @@ void __init setup_arch_memory(void) #ifdef CONFIG_HIGHMEM /* - * Populate a new node with highmem - * * On ARC (w/o PAE) HIGHMEM addresses are actually smaller (0 based) - * than addresses in normal ala low memory (0x8000_0000 based). + * than addresses in normal aka low memory (0x8000_0000 based). * Even with PAE, the huge peripheral space hole would waste a lot of - * mem with single mem_map[]. This warrants a mem_map per region design. - * Thus HIGHMEM on ARC is imlemented with DISCONTIGMEM. - * - * DISCONTIGMEM in turns requires multiple nodes. node 0 above is - * populated with normal memory zone while node 1 only has highmem + * mem with single contiguous mem_map[]. + * Thus when HIGHMEM on ARC is enabled the memory map corresponding + * to the hole is freed and ARC specific version of pfn_valid() + * handles the hole in the memory map. */ #ifdef CONFIG_DISCONTIGMEM node_set_online(1); -- 2.28.0 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Rapoport Date: Wed, 02 Jun 2021 10:53:41 +0000 Subject: [PATCH 2/9] arc: update comment about HIGHMEM implementation Message-Id: <20210602105348.13387-3-rppt@kernel.org> List-Id: References: <20210602105348.13387-1-rppt@kernel.org> In-Reply-To: <20210602105348.13387-1-rppt@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Andrew Morton Cc: Arnd Bergmann , Geert Uytterhoeven , Ivan Kokshaysky , Jonathan Corbet , Matt Turner , Mike Rapoport , Mike Rapoport , Richard Henderson , Vineet Gupta , kexec@lists.infradead.org, linux-alpha@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-mm@kvack.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-xtensa@linux-xtensa.org, linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org From: Mike Rapoport Arc does not use DISCONTIGMEM to implement high memory, update the comment describing how high memory works to reflect this. Signed-off-by: Mike Rapoport --- arch/arc/mm/init.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c index e2ed355438c9..397a201adfe3 100644 --- a/arch/arc/mm/init.c +++ b/arch/arc/mm/init.c @@ -139,16 +139,13 @@ void __init setup_arch_memory(void) #ifdef CONFIG_HIGHMEM /* - * Populate a new node with highmem - * * On ARC (w/o PAE) HIGHMEM addresses are actually smaller (0 based) - * than addresses in normal ala low memory (0x8000_0000 based). + * than addresses in normal aka low memory (0x8000_0000 based). * Even with PAE, the huge peripheral space hole would waste a lot of - * mem with single mem_map[]. This warrants a mem_map per region design. - * Thus HIGHMEM on ARC is imlemented with DISCONTIGMEM. - * - * DISCONTIGMEM in turns requires multiple nodes. node 0 above is - * populated with normal memory zone while node 1 only has highmem + * mem with single contiguous mem_map[]. + * Thus when HIGHMEM on ARC is enabled the memory map corresponding + * to the hole is freed and ARC specific version of pfn_valid() + * handles the hole in the memory map. */ #ifdef CONFIG_DISCONTIGMEM node_set_online(1); -- 2.28.0 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 X-Spam-Level: X-Spam-Status: No, score=-17.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,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 6F654C4708F for ; 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h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NZQ2rr2E/OctHk1XnG/C5vLVoo2DWWNRKDUphu7Fh35eCKk7WRb+E/oZ1QWpjns4n 483dCoOUenIqXs2GkrV7dD0CBQudFaPjtEpqVBzYDkYbv3dPEwgvpFNS1sK8Qm2M5h dfPcSWwLtEgixqKEsihdQBlQLPat/EiAfVdcN+PKy/jPFrwO4GBJW17FhoiRnP5FE/ LjACmzvLPl6AQjzug1qGPe7CVpkPamqtdaxLDkkdyw7FIplstRB17LG7WMeV+G4ZvT AznPR6UfbTW4ZrJ8sIkP2lNwVl5gX3ybDLO4yKMbiW88ZJjTyFtboulTH3d2QuUriT IjqRNXEinP8RQ== From: Mike Rapoport To: Andrew Morton Cc: Arnd Bergmann , Geert Uytterhoeven , Ivan Kokshaysky , Jonathan Corbet , Matt Turner , Mike Rapoport , Mike Rapoport , Richard Henderson , Vineet Gupta , kexec@lists.infradead.org, linux-alpha@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-mm@kvack.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-xtensa@linux-xtensa.org, linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org Subject: [PATCH 2/9] arc: update comment about HIGHMEM implementation Date: Wed, 2 Jun 2021 13:53:41 +0300 Message-Id: <20210602105348.13387-3-rppt@kernel.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20210602105348.13387-1-rppt@kernel.org> References: <20210602105348.13387-1-rppt@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210602_035413_478204_EEB386FB X-CRM114-Status: GOOD ( 13.28 ) X-BeenThere: linux-riscv@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: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org From: Mike Rapoport Arc does not use DISCONTIGMEM to implement high memory, update the comment describing how high memory works to reflect this. Signed-off-by: Mike Rapoport --- arch/arc/mm/init.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c index e2ed355438c9..397a201adfe3 100644 --- a/arch/arc/mm/init.c +++ b/arch/arc/mm/init.c @@ -139,16 +139,13 @@ void __init setup_arch_memory(void) #ifdef CONFIG_HIGHMEM /* - * Populate a new node with highmem - * * On ARC (w/o PAE) HIGHMEM addresses are actually smaller (0 based) - * than addresses in normal ala low memory (0x8000_0000 based). + * than addresses in normal aka low memory (0x8000_0000 based). * Even with PAE, the huge peripheral space hole would waste a lot of - * mem with single mem_map[]. This warrants a mem_map per region design. - * Thus HIGHMEM on ARC is imlemented with DISCONTIGMEM. - * - * DISCONTIGMEM in turns requires multiple nodes. node 0 above is - * populated with normal memory zone while node 1 only has highmem + * mem with single contiguous mem_map[]. + * Thus when HIGHMEM on ARC is enabled the memory map corresponding + * to the hole is freed and ARC specific version of pfn_valid() + * handles the hole in the memory map. */ #ifdef CONFIG_DISCONTIGMEM node_set_online(1); -- 2.28.0 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv 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 X-Spam-Level: X-Spam-Status: No, score=-17.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,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 E1D84C47083 for ; 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bh=TeLSyFPklEtFQSdX/6h5qEf4ASFBbt+e0wivtqLOGzQ=; b=RIySqbLTHGCg8g 02MXBujNicqY6LTpAtumXfovLSeavvGUunffpdYw7WZDr/dozwpEIlWUiPendSExvMkvJua1b+lA5 N3wSik9HCAGf7cUnSsgn7TuPdGJOpP+feNto5NM8P832V98+jYNLvlVh8SR/Gn17dfMHxUp7NkAp2 FuSpfa2Dnq6VumhmOWt9YjUiPLdvBicLtOPqVyBE+i9dEpW9+Jg2/En7qcFKsmrN1mvT1JtMxyGqw 3yy2Th+M1ynRexfrSKaCA4nYKQ4WMAR98KnnA1btWg0+5ccaMpK5CaAoGdfuFqKXcSQmhaIBgXm7o z0LsY8eVgkYtimXkVCaA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1loOc0-003Wsp-Ku; Wed, 02 Jun 2021 11:00:36 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1loOVp-003U9X-Bt; Wed, 02 Jun 2021 10:54:14 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id F3015613D2; Wed, 2 Jun 2021 10:54:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1622631253; bh=M0bKVaGHx9OxuQ1E9oxHVBUkdvBwvAMGJJiXepUaSFE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NZQ2rr2E/OctHk1XnG/C5vLVoo2DWWNRKDUphu7Fh35eCKk7WRb+E/oZ1QWpjns4n 483dCoOUenIqXs2GkrV7dD0CBQudFaPjtEpqVBzYDkYbv3dPEwgvpFNS1sK8Qm2M5h dfPcSWwLtEgixqKEsihdQBlQLPat/EiAfVdcN+PKy/jPFrwO4GBJW17FhoiRnP5FE/ LjACmzvLPl6AQjzug1qGPe7CVpkPamqtdaxLDkkdyw7FIplstRB17LG7WMeV+G4ZvT AznPR6UfbTW4ZrJ8sIkP2lNwVl5gX3ybDLO4yKMbiW88ZJjTyFtboulTH3d2QuUriT IjqRNXEinP8RQ== From: Mike Rapoport To: Andrew Morton Cc: Arnd Bergmann , Geert Uytterhoeven , Ivan Kokshaysky , Jonathan Corbet , Matt Turner , Mike Rapoport , Mike Rapoport , Richard Henderson , Vineet Gupta , kexec@lists.infradead.org, linux-alpha@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-mm@kvack.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-xtensa@linux-xtensa.org, linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org Subject: [PATCH 2/9] arc: update comment about HIGHMEM implementation Date: Wed, 2 Jun 2021 13:53:41 +0300 Message-Id: <20210602105348.13387-3-rppt@kernel.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20210602105348.13387-1-rppt@kernel.org> References: <20210602105348.13387-1-rppt@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210602_035413_478204_EEB386FB X-CRM114-Status: GOOD ( 13.28 ) X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+linux-snps-arc=archiver.kernel.org@lists.infradead.org From: Mike Rapoport Arc does not use DISCONTIGMEM to implement high memory, update the comment describing how high memory works to reflect this. Signed-off-by: Mike Rapoport --- arch/arc/mm/init.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c index e2ed355438c9..397a201adfe3 100644 --- a/arch/arc/mm/init.c +++ b/arch/arc/mm/init.c @@ -139,16 +139,13 @@ void __init setup_arch_memory(void) #ifdef CONFIG_HIGHMEM /* - * Populate a new node with highmem - * * On ARC (w/o PAE) HIGHMEM addresses are actually smaller (0 based) - * than addresses in normal ala low memory (0x8000_0000 based). + * than addresses in normal aka low memory (0x8000_0000 based). * Even with PAE, the huge peripheral space hole would waste a lot of - * mem with single mem_map[]. This warrants a mem_map per region design. - * Thus HIGHMEM on ARC is imlemented with DISCONTIGMEM. - * - * DISCONTIGMEM in turns requires multiple nodes. node 0 above is - * populated with normal memory zone while node 1 only has highmem + * mem with single contiguous mem_map[]. + * Thus when HIGHMEM on ARC is enabled the memory map corresponding + * to the hole is freed and ARC specific version of pfn_valid() + * handles the hole in the memory map. */ #ifdef CONFIG_DISCONTIGMEM node_set_online(1); -- 2.28.0 _______________________________________________ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc 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 X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 D831CC47083 for ; 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spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=198.145.29.99; helo=mail.kernel.org; envelope-from=rppt@kernel.org; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=NZQ2rr2E; dkim-atps=neutral Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4Fw5WC3LJcz3022 for ; Wed, 2 Jun 2021 20:54:15 +1000 (AEST) Received: by mail.kernel.org (Postfix) with ESMTPSA id F3015613D2; Wed, 2 Jun 2021 10:54:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1622631253; bh=M0bKVaGHx9OxuQ1E9oxHVBUkdvBwvAMGJJiXepUaSFE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NZQ2rr2E/OctHk1XnG/C5vLVoo2DWWNRKDUphu7Fh35eCKk7WRb+E/oZ1QWpjns4n 483dCoOUenIqXs2GkrV7dD0CBQudFaPjtEpqVBzYDkYbv3dPEwgvpFNS1sK8Qm2M5h dfPcSWwLtEgixqKEsihdQBlQLPat/EiAfVdcN+PKy/jPFrwO4GBJW17FhoiRnP5FE/ LjACmzvLPl6AQjzug1qGPe7CVpkPamqtdaxLDkkdyw7FIplstRB17LG7WMeV+G4ZvT AznPR6UfbTW4ZrJ8sIkP2lNwVl5gX3ybDLO4yKMbiW88ZJjTyFtboulTH3d2QuUriT IjqRNXEinP8RQ== From: Mike Rapoport To: Andrew Morton Subject: [PATCH 2/9] arc: update comment about HIGHMEM implementation Date: Wed, 2 Jun 2021 13:53:41 +0300 Message-Id: <20210602105348.13387-3-rppt@kernel.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20210602105348.13387-1-rppt@kernel.org> References: <20210602105348.13387-1-rppt@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-ia64@vger.kernel.org, linux-sh@vger.kernel.org, linux-mips@vger.kernel.org, linux-mm@kvack.org, sparclinux@vger.kernel.org, linux-riscv@lists.infradead.org, linux-arch@vger.kernel.org, linux-s390@vger.kernel.org, Jonathan Corbet , linux-doc@vger.kernel.org, Mike Rapoport , Geert Uytterhoeven , Matt Turner , linux-snps-arc@lists.infradead.org, linux-xtensa@linux-xtensa.org, Arnd Bergmann , linux-m68k@lists.linux-m68k.org, Ivan Kokshaysky , linux-arm-kernel@lists.infradead.org, Richard Henderson , Vineet Gupta , kexec@lists.infradead.org, linux-kernel@vger.kernel.org, linux-alpha@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Mike Rapoport Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" From: Mike Rapoport Arc does not use DISCONTIGMEM to implement high memory, update the comment describing how high memory works to reflect this. Signed-off-by: Mike Rapoport --- arch/arc/mm/init.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c index e2ed355438c9..397a201adfe3 100644 --- a/arch/arc/mm/init.c +++ b/arch/arc/mm/init.c @@ -139,16 +139,13 @@ void __init setup_arch_memory(void) #ifdef CONFIG_HIGHMEM /* - * Populate a new node with highmem - * * On ARC (w/o PAE) HIGHMEM addresses are actually smaller (0 based) - * than addresses in normal ala low memory (0x8000_0000 based). + * than addresses in normal aka low memory (0x8000_0000 based). * Even with PAE, the huge peripheral space hole would waste a lot of - * mem with single mem_map[]. This warrants a mem_map per region design. - * Thus HIGHMEM on ARC is imlemented with DISCONTIGMEM. - * - * DISCONTIGMEM in turns requires multiple nodes. node 0 above is - * populated with normal memory zone while node 1 only has highmem + * mem with single contiguous mem_map[]. + * Thus when HIGHMEM on ARC is enabled the memory map corresponding + * to the hole is freed and ARC specific version of pfn_valid() + * handles the hole in the memory map. */ #ifdef CONFIG_DISCONTIGMEM node_set_online(1); -- 2.28.0 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 X-Spam-Level: X-Spam-Status: No, score=-17.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,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 3C7A0C4708F for ; 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bh=WtSkAiNBGaMIxTQP0U/k+rzDXon+4dwAB2B3dor+lYA=; b=AdJLeTWStA7P/k ts8b4KUmx5TGAz25AmAFySS4002r+6I2qpP1I55gCr2jmVLKzkK9UuIGErohGrw2j1p/tN14PHrZT Fw0uesoH9aY8jllGng3tCjVIwrRBEd6BvTncUkTY4nzFzLKTjkroURdx5MYDulj0SzKsO9hp8A9Dk 6PsixiI7o3jsK7vFIlHUoTk1OJmuBwpgJEschYlso2wv+nQL3oy+NmWhfccHdTzw4+xuH4foAqVmx 5Jq6/+pLQqIVxGap77bBrCInAiUUEbJg37XSReNVJAUHrxu7g2cpMCLtsLOrZLyUShd/7bhuE7Lo7 xiThZFpj8tZo4d/tEMmQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1loOaq-003WKH-8m; Wed, 02 Jun 2021 10:59:25 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1loOVp-003U9X-Bt; Wed, 02 Jun 2021 10:54:14 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id F3015613D2; Wed, 2 Jun 2021 10:54:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1622631253; bh=M0bKVaGHx9OxuQ1E9oxHVBUkdvBwvAMGJJiXepUaSFE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NZQ2rr2E/OctHk1XnG/C5vLVoo2DWWNRKDUphu7Fh35eCKk7WRb+E/oZ1QWpjns4n 483dCoOUenIqXs2GkrV7dD0CBQudFaPjtEpqVBzYDkYbv3dPEwgvpFNS1sK8Qm2M5h dfPcSWwLtEgixqKEsihdQBlQLPat/EiAfVdcN+PKy/jPFrwO4GBJW17FhoiRnP5FE/ LjACmzvLPl6AQjzug1qGPe7CVpkPamqtdaxLDkkdyw7FIplstRB17LG7WMeV+G4ZvT AznPR6UfbTW4ZrJ8sIkP2lNwVl5gX3ybDLO4yKMbiW88ZJjTyFtboulTH3d2QuUriT IjqRNXEinP8RQ== From: Mike Rapoport To: Andrew Morton Cc: Arnd Bergmann , Geert Uytterhoeven , Ivan Kokshaysky , Jonathan Corbet , Matt Turner , Mike Rapoport , Mike Rapoport , Richard Henderson , Vineet Gupta , kexec@lists.infradead.org, linux-alpha@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-mm@kvack.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-xtensa@linux-xtensa.org, linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org Subject: [PATCH 2/9] arc: update comment about HIGHMEM implementation Date: Wed, 2 Jun 2021 13:53:41 +0300 Message-Id: <20210602105348.13387-3-rppt@kernel.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20210602105348.13387-1-rppt@kernel.org> References: <20210602105348.13387-1-rppt@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210602_035413_478204_EEB386FB X-CRM114-Status: GOOD ( 13.28 ) X-BeenThere: linux-arm-kernel@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: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Mike Rapoport Arc does not use DISCONTIGMEM to implement high memory, update the comment describing how high memory works to reflect this. Signed-off-by: Mike Rapoport --- arch/arc/mm/init.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c index e2ed355438c9..397a201adfe3 100644 --- a/arch/arc/mm/init.c +++ b/arch/arc/mm/init.c @@ -139,16 +139,13 @@ void __init setup_arch_memory(void) #ifdef CONFIG_HIGHMEM /* - * Populate a new node with highmem - * * On ARC (w/o PAE) HIGHMEM addresses are actually smaller (0 based) - * than addresses in normal ala low memory (0x8000_0000 based). + * than addresses in normal aka low memory (0x8000_0000 based). * Even with PAE, the huge peripheral space hole would waste a lot of - * mem with single mem_map[]. This warrants a mem_map per region design. - * Thus HIGHMEM on ARC is imlemented with DISCONTIGMEM. - * - * DISCONTIGMEM in turns requires multiple nodes. node 0 above is - * populated with normal memory zone while node 1 only has highmem + * mem with single contiguous mem_map[]. + * Thus when HIGHMEM on ARC is enabled the memory map corresponding + * to the hole is freed and ARC specific version of pfn_valid() + * handles the hole in the memory map. */ #ifdef CONFIG_DISCONTIGMEM node_set_online(1); -- 2.28.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel