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[5.9.137.197]) by mx.google.com with ESMTPS id y4si36530268wrt.288.2019.04.16.06.15.54 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 16 Apr 2019 06:15:54 -0700 (PDT) Received-SPF: pass (google.com: domain of bp@alien8.de designates 5.9.137.197 as permitted sender) client-ip=5.9.137.197; Authentication-Results: mx.google.com; dkim=pass header.i=@alien8.de header.s=dkim header.b=Tc8Fq89c; spf=pass (google.com: domain of bp@alien8.de designates 5.9.137.197 as permitted sender) smtp.mailfrom=bp@alien8.de; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=alien8.de Received: from zn.tnic (p200300EC2F0D690030B3A6530520175E.dip0.t-ipconnect.de [IPv6:2003:ec:2f0d:6900:30b3:a653:520:175e]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id 7E99E1EC02AE; Tue, 16 Apr 2019 15:15:53 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1555420553; 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: content-transfer-encoding:in-reply-to:in-reply-to: references:references; bh=zVxj07jVogt5Hk1WdJjXggizYLQPKdX0WopBNEyREwk=; b=Tc8Fq89c2kKkDqJVu4BY0Ifsa95BRIITsZfaZkdqCzcnsH3dSJ4SkYx++cGCZ+pnNLyRpu 0O6TWxaxsWShIm9opg3Cike6nCrbQGw/Tqe2oowyUgVxh5L9HFwhcIfXFcmdXzYj4mKs20 UadxgI1pAvsAI21kKttt1qdso1QhDCg= Date: Tue, 16 Apr 2019 15:15:49 +0200 From: Borislav Petkov To: Chen Zhou Cc: tglx@linutronix.de, mingo@redhat.com, ebiederm@xmission.com, rppt@linux.ibm.com, catalin.marinas@arm.com, will.deacon@arm.com, akpm@linux-foundation.org, ard.biesheuvel@linaro.org, horms@verge.net.au, takahiro.akashi@linaro.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kexec@lists.infradead.org, linux-mm@kvack.org, wangkefeng.wang@huawei.com Subject: Re: [RESEND PATCH v5 0/4] support reserving crashkernel above 4G on arm64 kdump Message-ID: <20190416131549.GD31772@zn.tnic> References: <20190416113519.90507-1-chenzhou10@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20190416113519.90507-1-chenzhou10@huawei.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Tue, Apr 16, 2019 at 07:35:15PM +0800, Chen Zhou wrote: > When crashkernel is reserved above 4G in memory, kernel should reserve > some amount of low memory for swiotlb and some DMA buffers. So there may > be two crash kernel regions, one is below 4G, the other is above 4G. > > Crash dump kernel reads more than one crash kernel regions via a dtb > property under node /chosen, > linux,usable-memory-range = . Can you please not flood everyone with this patchset every day, and today twice? This is not the frequency with how you send patchsets upstream. See https://www.kernel.org/doc/html/latest/process/submitting-patches.html#don-t-get-discouraged-or-impatient -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.