From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753600AbaHEODP (ORCPT ); Tue, 5 Aug 2014 10:03:15 -0400 Received: from mga11.intel.com ([192.55.52.93]:18522 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751329AbaHEODN (ORCPT ); Tue, 5 Aug 2014 10:03:13 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.01,804,1400050800"; d="scan'208";a="571992314" Date: Tue, 5 Aug 2014 22:03:07 +0800 From: Fengguang Wu To: Peter Zijlstra , linux-nfs@vger.kernel.org Cc: Jet Chen , Su Tao , Yuanhan Liu , LKP , linux-kernel@vger.kernel.org Subject: [nfs] BUG: sleeping function called from invalid context at include/linux/wait.h:976 Message-ID: <20140805140307.GB5593@localhost> MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="H+4ONPRPur6+Ovig" Content-Disposition: inline User-Agent: Heirloom mailx 12.5 6/20/10 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --H+4ONPRPur6+Ovig Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Greetings, Here is an NFS error triggered by this debug check. git://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/wait commit b87699e5fa31f451987a992b9cbda22d29ebcb46 Author: Peter Zijlstra AuthorDate: Mon Aug 4 11:12:21 2014 +0200 Commit: Peter Zijlstra CommitDate: Mon Aug 4 13:29:57 2014 +0200 wait: Add might_sleep() Add more might_sleep() checks, suppose someone put a wait_event() like thing in a wait loop.. Can't put might_sleep() in ___wait_event() because there's the locked primitives which call ___wait_event() with locks held. Signed-off-by: Peter Zijlstra Link: http://lkml.kernel.org/n/tip-amr894sd1j012khd3fgyh9m8@git.kernel.org [ 13.363454] BUG: sleeping function called from invalid context at include/linux/wait.h:976 [ 13.365679] in_atomic(): 1, irqs_disabled(): 0, pid: 2715, name: dmesg [ 13.367109] CPU: 1 PID: 2715 Comm: dmesg Not tainted 3.16.0-00048-gb87699e #1 [ 13.368385] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 13.369544] 0000000000000000 ffff88003e3efad0 ffffffff819c6bad ffff880035e9e480 [ 13.371838] ffff88003e3efae0 ffffffff81106e96 ffff88003e3efb00 ffffffff81306a2e [ 13.373822] ffff880035e9e480 ffff88001b8a1a40 ffff88003e3efb48 ffffffff8130975a [ 13.376165] Call Trace: [ 13.376890] [] dump_stack+0x4d/0x66 [ 13.377903] [] __might_sleep+0x10a/0x10c [ 13.379247] [] nfs_page_group_lock+0x4e/0x7b [ 13.380739] [] nfs_lock_and_join_requests+0x83/0x334 [ 13.381884] [] nfs_do_writepage+0x94/0x191 [ 13.383078] [] nfs_writepages_callback+0x13/0x25 [ 13.384592] [] ? nfs_do_writepage+0x191/0x191 [ 13.385745] [] write_cache_pages+0x281/0x3a9 [ 13.386829] [] ? nfs_do_writepage+0x191/0x191 [ 13.388524] [] nfs_writepages+0xa9/0x10f [ 13.389903] [] ? release_pages+0x1a2/0x20b [ 13.391087] [] ? free_pcppages_bulk+0x298/0x33c [ 13.392198] [] do_writepages+0x1e/0x2c [ 13.393202] [] __filemap_fdatawrite_range+0x55/0x57 [ 13.394313] [] filemap_write_and_wait_range+0x2a/0x58 [ 13.395448] [] nfs_file_fsync+0x4e/0x10c [ 13.396546] [] vfs_fsync_range+0x1b/0x23 [ 13.397567] [] vfs_fsync+0x1c/0x1e [ 13.398517] [] nfs_file_flush+0x6c/0x6f [ 13.399513] [] filp_close+0x3c/0x72 [ 13.400646] [] put_files_struct+0x67/0xb3 [ 13.401759] [] exit_files+0x4a/0x4f [ 13.402756] [] do_exit+0x3c9/0x985 [ 13.403740] [] ? trace_do_page_fault+0x52/0xb7 [ 13.404875] [] do_group_exit+0x44/0xac [ 13.405878] [] SyS_exit_group+0x14/0x14 [ 13.406892] [] system_call_fastpath+0x16/0x1b [ 15.733276] BUG: sleeping function called from invalid context at include/linux/wait.h:976 [ 15.735154] in_atomic(): 1, irqs_disabled(): 0, pid: 2716, name: cat [ 15.736263] CPU: 1 PID: 2716 Comm: cat Not tainted 3.16.0-00048-gb87699e #1 [ 15.737414] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 15.738754] 0000000000000000 ffff88000068b910 ffffffff819c6bad ffff880035e9e080 [ 15.746872] ffff88000068b920 ffffffff81106e96 ffff88000068b940 ffffffff81306a2e [ 15.748694] ffff880035e9e080 ffff88001b8a1a40 ffff88000068b988 ffffffff8130975a [ 15.750479] Call Trace: [ 15.751164] [] dump_stack+0x4d/0x66 [ 15.752141] [] __might_sleep+0x10a/0x10c [ 15.753148] [] nfs_page_group_lock+0x4e/0x7b [ 15.754183] [] nfs_lock_and_join_requests+0x83/0x334 [ 15.755294] [] nfs_do_writepage+0x94/0x191 [ 15.756335] [] nfs_writepages_callback+0x13/0x25 [ 15.757405] [] ? nfs_do_writepage+0x191/0x191 [ 15.758452] [] write_cache_pages+0x281/0x3a9 [ 15.759483] [] ? nfs_do_writepage+0x191/0x191 [ 15.760547] [] nfs_writepages+0xa9/0x10f [ 15.761541] [] do_writepages+0x1e/0x2c [ 15.762514] [] __filemap_fdatawrite_range+0x55/0x57 [ 15.763612] [] filemap_write_and_wait_range+0x2a/0x58 [ 15.764746] [] nfs_file_fsync+0x4e/0x10c [ 15.765748] [] vfs_fsync_range+0x1b/0x23 [ 15.766745] [] vfs_fsync+0x1c/0x1e [ 15.767681] [] nfs_file_flush+0x6c/0x6f [ 15.768690] [] filp_close+0x3c/0x72 [ 15.769638] [] put_files_struct+0x67/0xb3 [ 15.770635] [] exit_files+0x4a/0x4f [ 15.771581] [] do_exit+0x3c9/0x985 [ 15.772537] [] ? __schedule+0x4cb/0x734 [ 15.773522] [] do_group_exit+0x44/0xac [ 15.774493] [] get_signal_to_deliver+0x53b/0x5cb [ 15.775575] [] do_signal+0x49/0x511 [ 15.776561] [] ? do_syslog+0x141/0x4a8 [ 15.777564] [] ? kmsg_read+0x2d/0x54 [ 15.778513] [] ? proc_reg_read+0x56/0x69 [ 15.779504] [] do_notify_resume+0x35/0x72 [ 15.780521] [] int_signal+0x12/0x17 This script may reproduce the error. ---------------------------------------------------------------------------- #!/bin/bash kernel=$1 initrd=debian-x86_64.cgz wget --no-clobber https://github.com/fengguang/reproduce-kernel-bug/raw/master/initrd/$initrd kvm=( qemu-system-x86_64 -enable-kvm -cpu Nehalem -kernel $kernel -initrd $initrd -m 1024 -smp 2 -net nic,vlan=1,model=e1000 -net user,vlan=1 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -serial stdio -display none -monitor null ) append=( root=/dev/ram0 ip=::::vm-vp-1G-5::dhcp oops=panic earlyprintk=ttyS0,115200 debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=10 softlockup_panic=1 nmi_watchdog=panic load_ramdisk=2 prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal ) "${kvm[@]}" --append "${append[*]}" ---------------------------------------------------------------------------- Thanks, Fengguang --H+4ONPRPur6+Ovig Content-Type: text/plain; charset=us-ascii Content-Disposition: inline _______________________________________________ LKP mailing list LKP@linux.intel.com --H+4ONPRPur6+Ovig--