{"id":655868,"url":"http://patchwork.ozlabs.org/api/patches/655868/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/1470330729-6273-2-git-send-email-srikar@linux.vnet.ibm.com/","project":{"id":2,"url":"http://patchwork.ozlabs.org/api/projects/2/?format=json","name":"Linux PPC development","link_name":"linuxppc-dev","list_id":"linuxppc-dev.lists.ozlabs.org","list_email":"linuxppc-dev@lists.ozlabs.org","web_url":"https://github.com/linuxppc/wiki/wiki","scm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git","webscm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/","list_archive_url":"https://lore.kernel.org/linuxppc-dev/","list_archive_url_format":"https://lore.kernel.org/linuxppc-dev/{}/","commit_url_format":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}"},"msgid":"<1470330729-6273-2-git-send-email-srikar@linux.vnet.ibm.com>","list_archive_url":"https://lore.kernel.org/linuxppc-dev/1470330729-6273-2-git-send-email-srikar@linux.vnet.ibm.com/","date":"2016-08-04T17:12:09","name":"[V2,2/2] fadump: Register the memory reserved by fadump","commit_ref":null,"pull_url":null,"state":"not-applicable","archived":false,"hash":"8016f89f33a6aef4940c3832c7f4605c76eee918","submitter":{"id":11795,"url":"http://patchwork.ozlabs.org/api/people/11795/?format=json","name":"Srikar Dronamraju","email":"srikar@linux.vnet.ibm.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/1470330729-6273-2-git-send-email-srikar@linux.vnet.ibm.com/mbox/","series":[],"comments":"http://patchwork.ozlabs.org/api/patches/655868/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/655868/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":["patchwork-incoming@ozlabs.org","linuxppc-dev@lists.ozlabs.org"],"Delivered-To":["patchwork-incoming@ozlabs.org","linuxppc-dev@lists.ozlabs.org"],"Received":["from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3])\n\t(using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3s4xNb0qm6z9stY\n\tfor ;\n\tFri, 5 Aug 2016 03:13:35 +1000 (AEST)","from ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3])\n\tby lists.ozlabs.org (Postfix) with ESMTP id 3s4xNZ6w0SzDqZ9\n\tfor ;\n\tFri, 5 Aug 2016 03:13:34 +1000 (AEST)","from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com\n\t[148.163.156.1])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256\n\tbits)) (No client certificate requested)\n\tby lists.ozlabs.org (Postfix) with ESMTPS id 3s4xMM5cGGzDqS9\n\tfor ;\n\tFri, 5 Aug 2016 03:12:31 +1000 (AEST)","from pps.filterd (m0098399.ppops.net [127.0.0.1])\n\tby mx0a-001b2d01.pphosted.com (8.16.0.11/8.16.0.11) with SMTP id\n\tu74H3wT9089139\n\tfor ; Thu, 4 Aug 2016 13:12:29 -0400","from e23smtp08.au.ibm.com (e23smtp08.au.ibm.com [202.81.31.141])\n\tby mx0a-001b2d01.pphosted.com with ESMTP id 24kkahggt0-1\n\t(version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT)\n\tfor ; Thu, 04 Aug 2016 13:12:29 -0400","from localhost\n\tby e23smtp08.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use\n\tOnly! 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Violators will be prosecuted; \n\tFri, 5 Aug 2016 03:12:24 +1000","from d23relay08.au.ibm.com (d23relay08.au.ibm.com [9.185.71.33])\n\tby d23dlp01.au.ibm.com (Postfix) with ESMTP id 726E92CE802D\n\tfor ;\n\tFri, 5 Aug 2016 03:12:24 +1000 (EST)","from d23av06.au.ibm.com (d23av06.au.ibm.com [9.190.235.151])\n\tby d23relay08.au.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id\n\tu74HCOK123527492\n\tfor ; Fri, 5 Aug 2016 03:12:24 +1000","from d23av06.au.ibm.com (localhost [127.0.0.1])\n\tby d23av06.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id\n\tu74HCNSG017968\n\tfor ; Fri, 5 Aug 2016 03:12:24 +1000","from srdronam.in.ibm.com (srdronam.in.ibm.com [9.124.31.34])\n\tby d23av06.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id\n\tu74HCI6x017834; Fri, 5 Aug 2016 03:12:21 +1000"],"X-IBM-Helo":"d23dlp01.au.ibm.com","X-IBM-MailFrom":"srikar@linux.vnet.ibm.com","X-IBM-RcptTo":"linuxppc-dev@lists.ozlabs.org","From":"Srikar Dronamraju ","To":"linux-mm@kvack.org, Mel Gorman ,\n\tVlastimil Babka , Michal Hocko ,\n\tAndrew Morton ,\n\tMichael Ellerman , linuxppc-dev@lists.ozlabs.org, \n\tMahesh Salgaonkar ,\n\tHari Bathini ","Subject":"[PATCH V2 2/2] fadump: Register the memory reserved by fadump","Date":"Thu, 4 Aug 2016 22:42:09 +0530","X-Mailer":"git-send-email 2.1.4","In-Reply-To":"<1470330729-6273-1-git-send-email-srikar@linux.vnet.ibm.com>","References":"<1470330729-6273-1-git-send-email-srikar@linux.vnet.ibm.com>","X-TM-AS-MML":"disable","X-Content-Scanned":"Fidelis XPS MAILER","x-cbid":"16080417-0048-0000-0000-000001A89CF2","X-IBM-AV-DETECTION":"SAVI=unused REMOTE=unused XFE=unused","x-cbparentid":"16080417-0049-0000-0000-00004645B65C","Message-Id":"<1470330729-6273-2-git-send-email-srikar@linux.vnet.ibm.com>","X-Proofpoint-Virus-Version":"vendor=fsecure engine=2.50.10432:, ,\n\tdefinitions=2016-08-04_09:, , signatures=0","X-Proofpoint-Spam-Details":"rule=outbound_notspam policy=outbound score=0\n\tspamscore=0 suspectscore=0\n\tmalwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam\n\tadjust=0 reason=mlx scancount=1 engine=8.0.1-1604210000\n\tdefinitions=main-1608040183","X-BeenThere":"linuxppc-dev@lists.ozlabs.org","X-Mailman-Version":"2.1.22","Precedence":"list","List-Id":"Linux on PowerPC Developers Mail List\n\t","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Cc":"Dave Hansen ,\n\tSrikar Dronamraju ","Errors-To":"linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org","Sender":"\"Linuxppc-dev\"\n\t"},"content":"Fadump kernel reserves large chunks of memory even before the pages are\ninitialized. This could mean memory that corresponds to several nodes might\nfall in memblock reserved regions.\n\nKernels compiled with CONFIG_DEFERRED_STRUCT_PAGE_INIT will initialize\nonly certain size memory per node. The certain size takes into account\nthe dentry and inode cache sizes. Currently the cache sizes are\ncalculated based on the total system memory including the reserved\nmemory. However such a kernel when booting the same kernel as fadump\nkernel will not be able to allocate the required amount of memory to\nsuffice for the dentry and inode caches. This results in crashes like\nthe below on large systems such as 32 TB systems.\n\nDentry cache hash table entries: 536870912 (order: 16, 4294967296 bytes)\nvmalloc: allocation failure, allocated 4097114112 of 17179934720 bytes\nswapper/0: page allocation failure: order:0, mode:0x2080020(GFP_ATOMIC)\nCPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.6-master+ #3\nCall Trace:\n[c00000000108fb10] [c0000000007fac88] dump_stack+0xb0/0xf0 (unreliable)\n[c00000000108fb50] [c000000000235264] warn_alloc_failed+0x114/0x160\n[c00000000108fbf0] [c000000000281484] __vmalloc_node_range+0x304/0x340\n[c00000000108fca0] [c00000000028152c] __vmalloc+0x6c/0x90\n[c00000000108fd40] [c000000000aecfb0]\nalloc_large_system_hash+0x1b8/0x2c0\n[c00000000108fe00] [c000000000af7240] inode_init+0x94/0xe4\n[c00000000108fe80] [c000000000af6fec] vfs_caches_init+0x8c/0x13c\n[c00000000108ff00] [c000000000ac4014] start_kernel+0x50c/0x578\n[c00000000108ff90] [c000000000008c6c] start_here_common+0x20/0xa8\n\nRegister the memory reserved by fadump, so that the cache sizes are\ncalculated based on the free memory (i.e Total memory - reserved\nmemory).\n\nSuggested-by: Mel Gorman \nSigned-off-by: Srikar Dronamraju \n---\n arch/powerpc/kernel/fadump.c | 1 +\n 1 file changed, 1 insertion(+)","diff":"diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c\nindex 3cb3b02a..ca5ec88 100644\n--- a/arch/powerpc/kernel/fadump.c\n+++ b/arch/powerpc/kernel/fadump.c\n@@ -330,6 +330,7 @@ int __init fadump_reserve_mem(void)\n \t}\n \tfw_dump.reserve_dump_area_start = base;\n \tfw_dump.reserve_dump_area_size = size;\n+\tset_memory_reserve(size/PAGE_SIZE, true);\n \treturn 1;\n }\n \n","prefixes":["V2","2/2"]}