Return-Path: linux-nfs-owner@vger.kernel.org Received: from fieldses.org ([174.143.236.118]:49015 "EHLO fieldses.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751098Ab3IJOJn (ORCPT ); Tue, 10 Sep 2013 10:09:43 -0400 Date: Tue, 10 Sep 2013 10:09:37 -0400 From: "J. Bruce Fields" To: Toralf =?utf-8?Q?F=C3=B6rster?= Cc: Jan Kara , Linux NFS mailing list , "user-mode-linux-devel@lists.sourceforge.net" , linux-ext4@vger.kernel.org, Linux Kernel , "J. Bruce Fields" Subject: Re: Issues with a rather unusual configured NFS server Message-ID: <20130910140937.GD16011@fieldses.org> References: <52075E01.7030506@gmx.de> <20130812143640.GF4596@quack.suse.cz> <20130813215313.GH17781@fieldses.org> <20130827180655.GE14809@fieldses.org> <521E318C.7040401@gmx.de> <522B9010.8070902@gmx.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 In-Reply-To: <522B9010.8070902@gmx.de> Sender: linux-nfs-owner@vger.kernel.org List-ID: On Sat, Sep 07, 2013 at 10:44:00PM +0200, Toralf Förster wrote: > Today I run latest git tree with a patched UML (this patch + one for xterm issues) and got 2 times a core dump > when I fuzzy test an UML machine with a nearly identical scenario as already described but just shutdowned > both UML images instead of shooting one of it in the head. This is a slightly different test case, so for now it sounds like this could be a preexisting problem, not a regression? --b. > > I'll probably need time to figure out a test case, but just as a pre-info here's the back trace: > > tfoerste@n22 ~ $ gdb --core=/mnt/ramdisk/core /usr/local/bin/linux-v3.11-7550-g768c9d3 -n -batch -ex bt > > warning: core file may not match specified executable file. > [New LWP 7470] > [New LWP 7479] > [New LWP 7477] > [New LWP 7478] > Core was generated by `/usr/local/bin/linux-v3.11-7550-g768c9d3 earlyprintk ubda=/home/tfoerste/virtua'. > Program terminated with signal 6, Aborted. > #0 0xb77be424 in __kernel_vsyscall () > #0 0xb77be424 in __kernel_vsyscall () > #1 0x083aada5 in kill () > #2 0x0807163d in uml_abort () at arch/um/os-Linux/util.c:93 > #3 0x08071925 in os_dump_core () at arch/um/os-Linux/util.c:138 > #4 0x080613a7 in panic_exit (self=0x85b1518 , unused1=0, unused2=0x85e76e0 ) at arch/um/kernel/um_arch.c:240 > #5 0x0809a398 in notifier_call_chain (nl=0x0, val=0, v=0x85e76e0 , nr_to_call=-2, nr_calls=0x0) at kernel/notifier.c:93 > #6 0x0809a4e3 in __atomic_notifier_call_chain (nr_calls=, nr_to_call=, v=, val=, nh=) at kernel/notifier.c:182 > #7 atomic_notifier_call_chain (nh=0x85e76c4 , val=0, v=0x85e76e0 ) at kernel/notifier.c:191 > #8 0x08408628 in panic (fmt=0x0) at kernel/panic.c:128 > #9 0x081131c9 in shrink_dcache_for_umount_subtree (dentry=0x428028f0) at fs/dcache.c:941 > #10 0x08113948 in shrink_dcache_for_umount (sb=0x463b8000) at fs/dcache.c:1002 > #11 0x08101677 in generic_shutdown_super (sb=0x463b8000) at fs/super.c:404 > #12 0x08102395 in kill_anon_super (sb=0x0) at fs/super.c:875 > #13 0x081d3ff8 in nfs_kill_super (s=0x0) at fs/nfs/super.c:2598 > #14 0x0810153a in deactivate_locked_super (s=0x463b8000) at fs/super.c:294 > #15 0x081015d1 in deactivate_super (s=0x463b8000) at fs/super.c:319 > #16 0x08119c0c in mntfree (mnt=) at fs/namespace.c:891 > #17 mntput_no_expire (mnt=0x0) at fs/namespace.c:929 > #18 0x0811b195 in SYSC_umount (flags=, name=) at fs/namespace.c:1335 > #19 SyS_umount (name=134633856, flags=2) at fs/namespace.c:1305 > #20 0x080618e2 in handle_syscall (r=0x498be5d4) at arch/um/kernel/skas/syscall.c:35 > #21 0x08073c0d in handle_trap (local_using_sysemu=, regs=, pid=) at arch/um/os-Linux/skas/process.c:198 > #22 userspace (regs=0x498be5d4) at arch/um/os-Linux/skas/process.c:431 > #23 0x0805e65c in fork_handler () at arch/um/kernel/process.c:160 > #24 0x00000000 in ?? () > > > > -- > MfG/Sincerely > Toralf Förster > pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3