Re: [nfs] BUG: sleeping function called from invalid context at include/linux/wait.h:976
From: Weston Andros Adamson
Date: Tue Aug 05 2014 - 11:08:53 EST
Thanks, I’ll investigate.
-dros
On Aug 5, 2014, at 10:03 AM, Fengguang Wu <fengguang.wu@xxxxxxxxx> wrote:
> 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 <peterz@xxxxxxxxxxxxx>
> AuthorDate: Mon Aug 4 11:12:21 2014 +0200
> Commit: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
> 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 <peterz@xxxxxxxxxxxxx>
> Link: http://lkml.kernel.org/n/tip-amr894sd1j012khd3fgyh9m8@xxxxxxxxxxxxxx
>
>
> [ 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] [<ffffffff819c6bad>] dump_stack+0x4d/0x66
> [ 13.377903] [<ffffffff81106e96>] __might_sleep+0x10a/0x10c
> [ 13.379247] [<ffffffff81306a2e>] nfs_page_group_lock+0x4e/0x7b
> [ 13.380739] [<ffffffff8130975a>] nfs_lock_and_join_requests+0x83/0x334
> [ 13.381884] [<ffffffff81309a9f>] nfs_do_writepage+0x94/0x191
> [ 13.383078] [<ffffffff81309baf>] nfs_writepages_callback+0x13/0x25
> [ 13.384592] [<ffffffff81309b9c>] ? nfs_do_writepage+0x191/0x191
> [ 13.385745] [<ffffffff811963d0>] write_cache_pages+0x281/0x3a9
> [ 13.386829] [<ffffffff81309b9c>] ? nfs_do_writepage+0x191/0x191
> [ 13.388524] [<ffffffff8130a1fd>] nfs_writepages+0xa9/0x10f
> [ 13.389903] [<ffffffff811994e1>] ? release_pages+0x1a2/0x20b
> [ 13.391087] [<ffffffff81194835>] ? free_pcppages_bulk+0x298/0x33c
> [ 13.392198] [<ffffffff81197c8b>] do_writepages+0x1e/0x2c
> [ 13.393202] [<ffffffff8118e3f4>] __filemap_fdatawrite_range+0x55/0x57
> [ 13.394313] [<ffffffff8118e4b4>] filemap_write_and_wait_range+0x2a/0x58
> [ 13.395448] [<ffffffff812ff101>] nfs_file_fsync+0x4e/0x10c
> [ 13.396546] [<ffffffff81211395>] vfs_fsync_range+0x1b/0x23
> [ 13.397567] [<ffffffff812113b9>] vfs_fsync+0x1c/0x1e
> [ 13.398517] [<ffffffff812ff679>] nfs_file_flush+0x6c/0x6f
> [ 13.399513] [<ffffffff811e918b>] filp_close+0x3c/0x72
> [ 13.400646] [<ffffffff8120295a>] put_files_struct+0x67/0xb3
> [ 13.401759] [<ffffffff81202a43>] exit_files+0x4a/0x4f
> [ 13.402756] [<ffffffff810e4073>] do_exit+0x3c9/0x985
> [ 13.403740] [<ffffffff8106e605>] ? trace_do_page_fault+0x52/0xb7
> [ 13.404875] [<ffffffff810e46a9>] do_group_exit+0x44/0xac
> [ 13.405878] [<ffffffff810e4725>] SyS_exit_group+0x14/0x14
> [ 13.406892] [<ffffffff819ce6a9>] 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] [<ffffffff819c6bad>] dump_stack+0x4d/0x66
> [ 15.752141] [<ffffffff81106e96>] __might_sleep+0x10a/0x10c
> [ 15.753148] [<ffffffff81306a2e>] nfs_page_group_lock+0x4e/0x7b
> [ 15.754183] [<ffffffff8130975a>] nfs_lock_and_join_requests+0x83/0x334
> [ 15.755294] [<ffffffff81309a9f>] nfs_do_writepage+0x94/0x191
> [ 15.756335] [<ffffffff81309baf>] nfs_writepages_callback+0x13/0x25
> [ 15.757405] [<ffffffff81309b9c>] ? nfs_do_writepage+0x191/0x191
> [ 15.758452] [<ffffffff811963d0>] write_cache_pages+0x281/0x3a9
> [ 15.759483] [<ffffffff81309b9c>] ? nfs_do_writepage+0x191/0x191
> [ 15.760547] [<ffffffff8130a1fd>] nfs_writepages+0xa9/0x10f
> [ 15.761541] [<ffffffff81197c8b>] do_writepages+0x1e/0x2c
> [ 15.762514] [<ffffffff8118e3f4>] __filemap_fdatawrite_range+0x55/0x57
> [ 15.763612] [<ffffffff8118e4b4>] filemap_write_and_wait_range+0x2a/0x58
> [ 15.764746] [<ffffffff812ff101>] nfs_file_fsync+0x4e/0x10c
> [ 15.765748] [<ffffffff81211395>] vfs_fsync_range+0x1b/0x23
> [ 15.766745] [<ffffffff812113b9>] vfs_fsync+0x1c/0x1e
> [ 15.767681] [<ffffffff812ff679>] nfs_file_flush+0x6c/0x6f
> [ 15.768690] [<ffffffff811e918b>] filp_close+0x3c/0x72
> [ 15.769638] [<ffffffff8120295a>] put_files_struct+0x67/0xb3
> [ 15.770635] [<ffffffff81202a43>] exit_files+0x4a/0x4f
> [ 15.771581] [<ffffffff810e4073>] do_exit+0x3c9/0x985
> [ 15.772537] [<ffffffff819caf04>] ? __schedule+0x4cb/0x734
> [ 15.773522] [<ffffffff810e46a9>] do_group_exit+0x44/0xac
> [ 15.774493] [<ffffffff810f0c03>] get_signal_to_deliver+0x53b/0x5cb
> [ 15.775575] [<ffffffff810392b9>] do_signal+0x49/0x511
> [ 15.776561] [<ffffffff81127334>] ? do_syslog+0x141/0x4a8
> [ 15.777564] [<ffffffff8124915d>] ? kmsg_read+0x2d/0x54
> [ 15.778513] [<ffffffff8123d924>] ? proc_reg_read+0x56/0x69
> [ 15.779504] [<ffffffff810397b6>] do_notify_resume+0x35/0x72
> [ 15.780521] [<ffffffff819ce908>] 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
> _______________________________________________
> LKP mailing list
> LKP@xxxxxxxxxxxxxxx
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