From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f199.google.com (mail-pf0-f199.google.com [209.85.192.199]) by kanga.kvack.org (Postfix) with ESMTP id 245526B0038 for ; Wed, 17 May 2017 09:13:14 -0400 (EDT) Received: by mail-pf0-f199.google.com with SMTP id a66so8776628pfl.6 for ; Wed, 17 May 2017 06:13:14 -0700 (PDT) Received: from szxga02-in.huawei.com (szxga02-in.huawei.com. [45.249.212.188]) by mx.google.com with ESMTPS id d187si2062049pfg.263.2017.05.17.06.13.12 for (version=TLS1 cipher=AES128-SHA bits=128/128); Wed, 17 May 2017 06:13:13 -0700 (PDT) Message-ID: <591C47E5.9010806@huawei.com> Date: Wed, 17 May 2017 20:53:57 +0800 From: zhong jiang MIME-Version: 1.0 Subject: Re: [Qustion] vmalloc area overlap with another allocated vmalloc area References: <591A8814.1010503@huawei.com> In-Reply-To: <591A8814.1010503@huawei.com> Content-Type: text/plain; charset="gb18030" Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Michal Hocko , Vlastimil Babka , Joonsoo Kim Cc: Linux Memory Management List , LKML +to linux-mm maintainer for any suggestions Thanks zhongjiang On 2017/5/16 13:03, zhong jiang wrote: > Hi > > I hit the following issue by runing /proc/vmallocinfo. The kernel is 4.1 stable and > 32 bit to be used. after I expand the vamlloc area, the issue is not occur again. > it is related to the overflow. but I do not see any problem so far. > > cat /proc/vmallocinfo > 0xf1580000-0xf1600000 524288 raw_dump_mem_write+0x10c/0x188 phys=8b901000 ioremap > 0xf1638000-0xf163a000 8192 mcss_pou_queue_init+0xa0/0x13c [mcss] phys=fc614000 ioremap > 0xf528e000-0xf5292000 16384 n_tty_open+0x10/0xd0 pages=3 vmalloc > 0xf5000000-0xf9001000 67112960 devm_ioremap+0x38/0x70 phys=40000000 ioremap > 0xfe001000-0xfe002000 4096 iotable_init+0x0/0xc phys=20001000 ioremap > 0xfe200000-0xfe201000 4096 iotable_init+0x0/0xc phys=1a000000 ioremap > 0xff100000-0xff101000 4096 iotable_init+0x0/0xc phys=2000a000 ioremap > > n_tty_open allocate the vmap area is surrounded by the devm_ioremap ioremap by above info. > I do not see also the race in the condition. > > I have no idea to the issue. Anyone has any suggestions will be appreicated. > The related config is attatched. > > Thanks > zhongjiang -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org