From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: linux-nfs-owner@vger.kernel.org Received: from mailout2.samsung.com ([203.254.224.25]:13157 "EHLO mailout2.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750805Ab3IZE1j (ORCPT ); Thu, 26 Sep 2013 00:27:39 -0400 Received: from epcpsbgr4.samsung.com (u144.gpu120.samsung.co.kr [203.254.230.144]) by mailout2.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0MTP00GTSTPOSE50@mailout2.samsung.com> for linux-nfs@vger.kernel.org; Thu, 26 Sep 2013 13:27:37 +0900 (KST) Date: Thu, 26 Sep 2013 04:27:37 +0000 (GMT) From: Jongman Heo Subject: Re: Re: Regression caused by commit 4bdc33ed ("NFSDv4.2: Add NFS v4.2 support to the NFS server") To: Anna Schumaker , "linux-nfs@vger.kernel.org" , "linux-kernel@vger.kernel.org" Reply-to: jongman.heo@samsung.com MIME-version: 1.0 Content-type: text/plain; charset=euc-kr MIME-version: 1.0 Message-id: 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S1750796Ab3IZE1k (ORCPT ); Thu, 26 Sep 2013 00:27:40 -0400 X-AuditID: cbfee690-b7f3b6d000007a15-01-5243b7b9f235 Date: Thu, 26 Sep 2013 04:27:37 +0000 (GMT) From: Jongman Heo Subject: Re: Re: Regression caused by commit 4bdc33ed ("NFSDv4.2: Add NFS v4.2 support to the NFS server") To: Anna Schumaker , "linux-nfs@vger.kernel.org" , "linux-kernel@vger.kernel.org" Reply-to: jongman.heo@samsung.com MIME-version: 1.0 X-MTR: 20130926042312274@jongman.heo Msgkey: 20130926042312274@jongman.heo X-EPLocale: ko_KR.euc-kr X-Priority: 3 X-EPWebmail-Msg-Type: personal X-EPWebmail-Reply-Demand: 0 X-EPApproval-Locale: X-EPHeader: ML X-EPTrCode: X-EPTrName: X-MLAttribute: X-RootMTR: 20130926042312274@jongman.heo X-ParentMTR: X-ArchiveUser: X-CPGSPASS: N Content-type: text/plain; charset=euc-kr MIME-version: 1.0 Message-id: <14287980.88031380169656788.JavaMail.weblogic@epml16> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprAKsWRmVeSWpSXmKPExsWyRsSkSHfXducgg1c7GC0u75rD5sDo8XmT 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Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by mail.home.local id r8Q4RmVW011663 > >------- Original Message ------- > >Sender : Anna Schumaker > >Date : 2013-09-25 22:52 (GMT+09:00) > >Title : Re: Regression caused by commit 4bdc33ed ("NFSDv4.2: Add NFS v4.2 support to the NFS server") > > > >Hi Jongman, > >Is the panic on your client or server? I don't see how the patch your >bisect led you to could cause the problem, since all it does is expand >the minor version array on the server. Your client doesn't have NFSD >enabled, so this code shouldn't even be affecting it. > >A few questions: what is your /etc/exports on the server? What >version of NFS are you using for nfsroot? > >Thanks! >Anna > >On Wed, Sep 25, 2013 at 1:19 AM, Jongman Heo wrote: >> >> Hi all, >> >> My embedded development box fails to NFS-boot with NFS server which uses recent kernel. >> >> Using git bisect, I found it is caused by commit 4bdc33ed ("NFSDv4.2: Add NFS v4.2 support to the NFS server"). >> >> >> 1. dmesg (NFS boot failure case) >> >> ... >> [ 2.040893] ADDRCONF(NETDEV_UP): eth0: link is not ready >> [ 2.046207] e1000: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX >> [ 2.053570] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready >> [ 3.055023] IP-Config: Guessing netmask 255.255.0.0 >> [ 3.059979] IP-Config: Gateway not on directly connected network. >> [ 3.066330] Looking up port of RPC 100003/2 on 165.213.88.249 >> [ 3.074001] Looking up port of RPC 100005/1 on 165.213.88.249 >> [ 3.122878] VFS: Unable to mount root fs via NFS, trying floppy. >> [ 3.129134] VFS: Cannot open root device "nfs" or unknown-block(2,0) >> [ 3.135478] Please append a correct "root=" boot option; here are the available partitions: >> [ 3.143831] 1f00 3072 mtdblock0 (driver?) >> [ 3.148798] 1f01 64 mtdblock1 (driver?) >> [ 3.153758] 1f02 64 mtdblock2 (driver?) >> [ 3.158719] 1f03 64 mtdblock3 (driver?) >> [ 3.163682] 1f04 64 mtdblock4 (driver?) >> [ 3.168644] 1f05 64 mtdblock5 (driver?) >> [ 3.173607] 1f06 64 mtdblock6 (driver?) >> [ 3.178568] 0800 488386584 sda driver: sd >> [ 3.183099] 0801 506016 sda1 >> [ 3.186927] 0802 4008217 sda2 >> [ 3.190755] 0803 483869767 sda3 >> [ 3.194584] b300 1880064 mmcblk0 driver: mmcblk >> [ 3.199802] b301 4096 mmcblk0p1 >> [ 3.204063] b302 102400 mmcblk0p2 >> [ 3.208330] b303 4096 mmcblk0p3 >> [ 3.212594] b304 1 mmcblk0p4 >> [ 3.216855] b305 2048 mmcblk0p5 >> [ 3.221116] b306 2048 mmcblk0p6 >> [ 3.225382] b307 2048 mmcblk0p7 >> [ 3.229644] b308 4096 mmcblk0p8 >> [ 3.233906] b309 12288 mmcblk0p9 >> [ 3.238176] b30a 16384 mmcblk0p10 >> [ 3.242524] b30b 142336 mmcblk0p11 >> [ 3.246869] b30c 1572864 mmcblk0p12 >> [ 3.251219] b320 12288 mmcblk0gp1 (driver?) >> [ 3.256272] b310 12288 mmcblk0gp0 (driver?) >> [ 3.261320] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0) >> [ 3.269566] Pid: 1, comm: swapper Not tainted 2.6.35 #1 >> [ 3.274776] Call Trace: >> [ 3.277232] [<80d0db5b>] ? printk+0x1e/0x20 >> [ 3.281492] [<80d0dad1>] panic+0x65/0xd1 >> [ 3.285495] [<80eb9ce3>] mount_block_root+0x125/0x1be >> [ 3.290631] [<809d1f6d>] ? sys_mknod+0x2d/0x30 >> [ 3.295156] [<80eb9f6d>] mount_root+0xd0/0xf2 >> [ 3.299591] [<80eba0d9>] prepare_namespace+0x14a/0x184 >> [ 3.304803] [<809c44f6>] ? sys_access+0x26/0x30 >> [ 3.309411] [<80eb9a4e>] kernel_init+0x25e/0x26e >> [ 3.314105] [<80eb97f0>] ? kernel_init+0x0/0x26e >> [ 3.318800] [<80903242>] kernel_thread_helper+0x6/0x10 >> >> >> 2. Client (my embedded box) configuration >> It's kernel 2.6.35 based, and has following NFS kernel configs. >> >> # grep NFS .config >> CONFIG_NFS_FS=y >> CONFIG_NFS_V3=y >> CONFIG_NFS_V3_ACL=y >> CONFIG_NFS_V4=y >> # CONFIG_NFS_V4_1 is not set >> CONFIG_ROOT_NFS=y >> # CONFIG_NFSD is not set >> CONFIG_NFS_ACL_SUPPORT=y >> CONFIG_NFS_COMMON=y >> >> >> 3. Server (NFSD) configuration >> Fedora 19 + latest linus git kernel 3.12.0-rc2+ (commit 22356f44, mm: Place preemption point in do_mlockall() loop) >> >> >> 4. workaround >> >> Reverting the commit 4bdc33ed resolves my issue, NFS boot is working then. >> I've done git bisect, but lost the resulting bisect log due to sudden power loss :(. >> >> Best regards, >> Jongman Heo > > > Hi, Please see my e-mail reply to J. Bruce Fields for the detail. Thanks, Jongman Heo.{.n++%ݶw{.n+{G{ayʇڙ,jfhz_(階ݢj"mG?&~iOzv^m ?I