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Mon, 29 Jun 2020 06:00:56 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 895FCA41C8; Mon, 29 Jun 2020 06:00:36 +0000 (GMT) Received: from [9.102.0.109] (unknown [9.102.0.109]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 29 Jun 2020 06:00:36 +0000 (GMT) Subject: Re: [PATCH 01/11] kexec_file: allow archs to handle special regions while locating memory hole To: piliu , Michael Ellerman , Andrew Morton References: <159319825403.16351.7253978047621755765.stgit@hbathini.in.ibm.com> <159319828304.16351.6990340111766605842.stgit@hbathini.in.ibm.com> From: Hari Bathini Message-ID: <38237270-ce15-c8ec-a527-1ff938ca257d@linux.ibm.com> Date: Mon, 29 Jun 2020 11:30:35 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252 Content-Language: en-US Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216, 18.0.687 definitions=2020-06-29_04:2020-06-26, 2020-06-29 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 mlxscore=0 adultscore=0 spamscore=0 suspectscore=0 impostorscore=0 cotscore=-2147483648 bulkscore=0 lowpriorityscore=0 clxscore=1015 mlxlogscore=999 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006290035 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: Kexec-ml , Petr Tesarik , Mahesh J Salgaonkar , Sourabh Jain , lkml , linuxppc-dev , Mimi Zohar , Vivek Goyal , Dave Young , Thiago Jung Bauermann , Eric Biederman Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On 28/06/20 7:58 am, piliu wrote: > Hi Hari, > > If in [4/11], get_exclude_memory_ranges() turns out to be unnecessary > ,then this patch is abundant either. As my understanding, memblock has > already helped to achieved the purpose that get_exclude_memory_ranges() > wants. As mentioned in the other patch, there is a need for @exclude_ranges as crashkernel region is likely to have an overlap with regions like opal, rtas.. But yeah.. the weak function should have been kexec_locate_mem_hole() instead of kexec_add_buffer(). Will take care of that in v2. > On 06/27/2020 03:04 AM, Hari Bathini wrote: >> Some archs can have special memory regions, within the given memory >> range, which can't be used for the buffer in a kexec segment. As >> kexec_add_buffer() function is being called from generic code as well, >> add weak arch_kexec_add_buffer definition for archs to override & take >> care of special regions before trying to locate a memory hole. >> >> Signed-off-by: Hari Bathini Thanks Hari