Kernel problem

What is it? dmesg output is flooded with something like this:

 8435.176545] ------------ cut here ]------------                                          
 8435.176593] WARNING: at /usr/src/packages/BUILD/kernel-pae-2.6.31.12/linux-2.6.31/fs/quota/dquot.c:964 dquot_claim_space+0x8c/0x150()                                                  
 8435.176612] Hardware name: MS-7549                                                        
 8435.176622] Modules linked in: nfs lockd fscache nfs_acl auth_rpcgss sunrpc af_packet ip6t_LOG xt_tcpudp xt_pkttype xt_physdev ipt_LOG xt_limit rfcomm sco bridge stp vboxnetadp llc vboxnetflt bnep snd_pcm_oss vboxdrv snd_mixer_oss snd_seq_midi snd_seq_midi_event l2cap snd_seq edd ip6t_REJECT nf_conntrack_ipv6 ip6table_raw xt_NOTRACK ipt_REJECT xt_state iptable_raw iptable_filter ip6table_mangle nf_conntrack_netbios_ns nf_conntrack_ipv4 cpufreq_conservative nf_conntrack nf_defrag_ipv4 cpufreq_userspace cpufreq_powersave ip_tables ip6table_filter powernow_k8 ip6_tables x_tables quota_v2 quota_tree fuse nls_utf8 nls_cp866 vfat fat loop dm_mod snd_hda_codec_atihdmi snd_hda_codec_realtek snd_cmipci snd_hda_intel fglrx(P) gameport snd_hda_codec snd_opl3_lib snd_hwdep snd_mpu401_uart snd_pcm ppdev sr_mod snd_rawmidi btusb parport_pc snd_seq_device shpchp snd_timer bluetooth parport cdrom floppy pci_hotplug r8169 pcspkr snd snd_page_alloc k8temp thermal rfkill wmi i2c_piix4 button sg fan processor thermal_sys ext4 crc16 jbd2 ide_pci_generic atiixp ide_core ata_generic pata_atiixp                         
 8435.176906] Pid: 32, comm: pdflush Tainted: P        W  2.6.31.12-0.2-pae #1              
 8435.176921] Call Trace:                                                                   
 8435.176953]  <c02082ea>] try_stack_unwind+0x17a/0x1a0                                    
 8435.176974]  <c020706c>] dump_trace+0x6c/0x130                                           
 8435.176993]  <c0207e98>] show_trace_log_lvl+0x58/0x80                                    
 8435.177011]  <c0207ee6>] show_trace+0x26/0x40                                            
 8435.177030]  <c069d905>] dump_stack+0x79/0x91                                            
 8435.177052]  <c0253e58>] warn_slowpath_common+0x78/0xc0                                  
 8435.177071]  <c0253ec1>] warn_slowpath_null+0x21/0x40                                    
 8435.177089]  <c0370d3c>] dquot_claim_space+0x8c/0x150                                    
 8435.177152]  <f7ecdb11>] ext4_mb_mark_diskspace_used+0x391/0x3e0 [ext4]                  
 8435.177285]  <f7ecf6e6>] ext4_mb_new_blocks+0x316/0x5a0 [ext4]                           
 8435.177408]  <f7e9edbf>] ext4_alloc_blocks+0x16f/0x270 [ext4]                            
 8435.177467]  <f7e9ff9e>] ext4_alloc_branch+0x8e/0x300 [ext4]                             
 8435.177523] DWARF2 unwinder stuck at ext4_alloc_branch+0x8e/0x300 [ext4]                  
 8435.177539]                                                                               
 8435.177548] Leftover inexact backtrace:                                                   
 8435.177550]                                                                               
 8435.177571]  <c034ce0d>] ? __find_get_block+0xdd/0x130                                   
 8435.177616]  <f7e9f306>] ? ext4_get_branch+0xc6/0x120 [ext4]                             
 8435.177666]  <f7ea2218>] ? ext4_ind_get_blocks+0x1e8/0x5a0 [ext4]                        
 8435.177685]  <c034dc80>] ? end_buffer_async_write+0x0/0x1c0                              
 8435.177732]  <f7ea26d8>] ? ext4_get_blocks+0x108/0x2f0 [ext4]                            
 8435.177780]  <f7ea2faf>] ? mpage_da_map_blocks+0x9f/0x420 [ext4]                         
 8435.177823]  <f7dfd4c3>] ? jbd2_journal_start+0xb3/0xf0 [jbd2]                           
 8435.177871]  <f7eb4bf5>] ? ext4_journal_start_sb+0x65/0xa0 [ext4]                        
 8435.177920]  <f7ea35b5>] ? ext4_da_writepages+0x285/0x530 [ext4]                         
 8435.177939]  <c02e59a0>] ? __writepage+0x0/0x50                                          
 8435.177955]  <c02e6c6e>] ? do_writepages+0x2e/0x60                                       
 8435.177972]  <c0345ea1>] ? writeback_single_inode+0x191/0x410                            
 8435.177990]  <c04354b4>] ? rb_erase+0xd4/0x140                                           
 8435.178007]  <c03465a9>] ? generic_sync_sb_inodes+0x219/0x4e0                            
 8435.178023]  <c03468b5>] ? sync_sb_inodes+0x45/0x60                                      
 8435.178038]  <c03469d3>] ? writeback_inodes+0x63/0x110                                   
 8435.178052]  <c02e5bd2>] ? wb_kupdate+0xa2/0x120                                         
 8435.178070]  <c02e7b39>] ? __pdflush+0x149/0x2b0                                         
 8435.178085]  <c02e7ca0>] ? pdflush+0x0/0x60                                              
 8435.178099]  <c02e7ce4>] ? pdflush+0x44/0x60                                             
 8435.178113]  <c02e5b30>] ? wb_kupdate+0x0/0x120                                          
 8435.178130]  <c0270fa4>] ? kthread+0x84/0x90                                             
 8435.178144]  <c0270f20>] ? kthread+0x0/0x90                                              
 8435.178159]  <c0204dab>] ? kernel_thread_helper+0x7/0x1c                                 
 8435.178173] --- end trace d3b34a28350c47e0 ]---                                          
 8485.176212] ------------ cut here ]------------                                          
 8485.176256] WARNING: at /usr/src/packages/BUILD/kernel-pae-2.6.31.12/linux-2.6.31/fs/quota/dquot.c:964 dquot_claim_space+0x8c/0x150()                                                  
 8485.176275] Hardware name: MS-7549                                                        
 8485.176285] Modules linked in: nfs lockd fscache nfs_acl auth_rpcgss sunrpc af_packet ip6t_LOG xt_tcpudp xt_pkttype xt_physdev ipt_LOG xt_limit rfcomm sco bridge stp vboxnetadp llc vboxnetflt bnep snd_pcm_oss vboxdrv snd_mixer_oss snd_seq_midi snd_seq_midi_event l2cap snd_seq edd ip6t_REJECT nf_conntrack_ipv6 ip6table_raw xt_NOTRACK ipt_REJECT xt_state iptable_raw iptable_filter ip6table_mangle nf_conntrack_netbios_ns nf_conntrack_ipv4 cpufreq_conservative nf_conntrack nf_defrag_ipv4 cpufreq_userspace cpufreq_powersave ip_tables ip6table_filter powernow_k8 ip6_tables x_tables quota_v2 quota_tree fuse nls_utf8 nls_cp866 vfat fat loop dm_mod snd_hda_codec_atihdmi snd_hda_codec_realtek snd_cmipci snd_hda_intel fglrx(P) gameport snd_hda_codec snd_opl3_lib snd_hwdep snd_mpu401_uart snd_pcm ppdev sr_mod snd_rawmidi btusb parport_pc snd_seq_device shpchp snd_timer bluetooth parport cdrom floppy pci_hotplug r8169 pcspkr snd snd_page_alloc k8temp thermal rfkill wmi i2c_piix4 button sg fan processor thermal_sys ext4 crc16 jbd2 ide_pci_generic atiixp ide_core ata_generic pata_atiixp                         
 8485.176594] Pid: 32, comm: pdflush Tainted: P        W  2.6.31.12-0.2-pae #1              
 8485.176608] Call Trace:                                                                   
 8485.176640]  <c02082ea>] try_stack_unwind+0x17a/0x1a0                                    
 8485.176661]  <c020706c>] dump_trace+0x6c/0x130                                           
 8485.176682]  <c0207e98>] show_trace_log_lvl+0x58/0x80                                    
 8485.176700]  <c0207ee6>] show_trace+0x26/0x40                                            
 8485.176719]  <c069d905>] dump_stack+0x79/0x91                                            
 8485.176739]  <c0253e58>] warn_slowpath_common+0x78/0xc0                                  
 8485.176758]  <c0253ec1>] warn_slowpath_null+0x21/0x40                                    
 8485.176776]  <c0370d3c>] dquot_claim_space+0x8c/0x150                                    
 8485.176842]  <f7ecdb11>] ext4_mb_mark_diskspace_used+0x391/0x3e0 [ext4]                  
 8485.176974]  <f7ecf6e6>] ext4_mb_new_blocks+0x316/0x5a0 [ext4]                           
 8485.177096]  <f7e9edbf>] ext4_alloc_blocks+0x16f/0x270 [ext4]                            
 8485.177154]  <f7e9ff9e>] ext4_alloc_branch+0x8e/0x300 [ext4]                             
 8485.177213] DWARF2 unwinder stuck at ext4_alloc_branch+0x8e/0x300 [ext4]                  
 8485.177228]                                                                               
 8485.177237] Leftover inexact backtrace:                                                   
 8485.177239]                                                                               
 8485.177265]  <c040810d>] ? generic_make_request+0x32d/0x510                              
 8485.177283]  <c02dfe1d>] ? mempool_alloc_slab+0x1d/0x40                                  
 8485.177331]  <f7ea2218>] ? ext4_ind_get_blocks+0x1e8/0x5a0 [ext4]                        
 8485.177353]  <c0434919>] ? radix_tree_gang_lookup_tag_slot+0x89/0xd0                     
 8485.177399]  <f7ea26d8>] ? ext4_get_blocks+0x108/0x2f0 [ext4]                            
 8485.177446]  <f7ea2faf>] ? mpage_da_map_blocks+0x9f/0x420 [ext4]                         
 8485.177487]  <f7dfd4c3>] ? jbd2_journal_start+0xb3/0xf0 [jbd2]                           
 8485.177534]  <f7eb4bf5>] ? ext4_journal_start_sb+0x65/0xa0 [ext4]                        
 8485.177583]  <f7ea35b5>] ? ext4_da_writepages+0x285/0x530 [ext4]                         
 8485.177602]  <c02e59a0>] ? __writepage+0x0/0x50                                          
 8485.177618]  <c02e6c6e>] ? do_writepages+0x2e/0x60                                       
 8485.177635]  <c0345ea1>] ? writeback_single_inode+0x191/0x410                            
 8485.177654]  <c022d8f0>] ? __ticket_spin_unlock+0x0/0x30                                 
 8485.177670]  <c03465a9>] ? generic_sync_sb_inodes+0x219/0x4e0                            
 8485.177686]  <c03468b5>] ? sync_sb_inodes+0x45/0x60                                      
 8485.177701]  <c03469d3>] ? writeback_inodes+0x63/0x110                                   
 8485.177715]  <c02e5bd2>] ? wb_kupdate+0xa2/0x120                                         
 8485.177730]  <c02e7b39>] ? __pdflush+0x149/0x2b0                                         
 8485.177745]  <c02e7ca0>] ? pdflush+0x0/0x60                                              
 8485.177759]  <c02e7ce4>] ? pdflush+0x44/0x60                                             
 8485.177773]  <c02e5b30>] ? wb_kupdate+0x0/0x120                                          
 8485.177789]  <c0270fa4>] ? kthread+0x84/0x90                                             
 8485.177804]  <c0270f20>] ? kthread+0x0/0x90                                              
 8485.177819]  <c0204dab>] ? kernel_thread_helper+0x7/0x1c                                 
 8485.177832] --- end trace d3b34a28350c47e1 ]---                                          

On 04/24/2010 02:36 PM, D E wrote:
>
> What is it? dmesg output is flooded with something like this:
>
>
> Code:
> --------------------
> 8435.176545] ------------ cut here ]------------
> 8435.176593] WARNING: at /usr/src/packages/BUILD/kernel-pae-2.6.31.12/linux-2.6.31/fs/quota/dquot.c:964 dquot_claim_space+0x8c/0x150()
> 8435.176612] Hardware name: MS-7549
> 8435.176622] Modules linked in: nfs lockd fscache nfs_acl auth_rpcgss sunrpc af_packet ip6t_LOG xt_tcpudp xt_pkttype xt_physdev ipt_LOG xt_limit rfcomm sco bridge stp vboxnetadp llc vboxnetflt bnep snd_pcm_oss vboxdrv snd_mixer_oss snd_seq_midi snd_seq_midi_event l2cap snd_seq edd ip6t_REJECT nf_conntrack_ipv6 ip6table_raw xt_NOTRACK ipt_REJECT xt_state iptable_raw iptable_filter ip6table_mangle nf_conntrack_netbios_ns nf_conntrack_ipv4 cpufreq_conservative nf_conntrack nf_defrag_ipv4 cpufreq_userspace cpufreq_powersave ip_tables ip6table_filter powernow_k8 ip6_tables x_tables quota_v2 quota_tree fuse nls_utf8 nls_cp866 vfat fat loop dm_mod snd_hda_codec_atihdmi snd_hda_codec_realtek snd_cmipci snd_hda_intel fglrx(P) gameport snd_hda_codec snd_opl3_lib snd_hwdep snd_mpu401_uart snd_pcm ppdev sr_mod snd_rawmidi btusb parport_pc snd_seq_device shpchp snd_timer bluetooth parport cdrom floppy pci_hotplug r8169 pcspkr snd snd_page_alloc k8temp thermal rfkill wmi i2c_piix4 bu
tton sg fan processor thermal_sys ext4 crc16 jbd2 ide_pci_generic atiixp ide_core ata_generic pata_atiixp
> 8435.176906] Pid: 32, comm: pdflush Tainted: P W 2.6.31.12-0.2-pae #1
> 8435.176921] Call Trace:
> 8435.176953] <c02082ea>] try_stack_unwind+0x17a/0x1a0
> 8435.176974] <c020706c>] dump_trace+0x6c/0x130
> 8435.176993] <c0207e98>] show_trace_log_lvl+0x58/0x80
> 8435.177011] <c0207ee6>] show_trace+0x26/0x40
> 8435.177030] <c069d905>] dump_stack+0x79/0x91
> 8435.177052] <c0253e58>] warn_slowpath_common+0x78/0xc0
> 8435.177071] <c0253ec1>] warn_slowpath_null+0x21/0x40
> 8435.177089] <c0370d3c>] dquot_claim_space+0x8c/0x150
> 8435.177152] <f7ecdb11>] ext4_mb_mark_diskspace_used+0x391/0x3e0 [ext4]
> 8435.177285] <f7ecf6e6>] ext4_mb_new_blocks+0x316/0x5a0 [ext4]
> 8435.177408] <f7e9edbf>] ext4_alloc_blocks+0x16f/0x270 [ext4]
> 8435.177467] <f7e9ff9e>] ext4_alloc_branch+0x8e/0x300 [ext4]
> 8435.177523] DWARF2 unwinder stuck at ext4_alloc_branch+0x8e/0x300 [ext4]
> 8435.177539]
> 8435.177548] Leftover inexact backtrace:
> 8435.177550]
> 8435.177571] <c034ce0d>] ? __find_get_block+0xdd/0x130
> 8435.177616] <f7e9f306>] ? ext4_get_branch+0xc6/0x120 [ext4]
> 8435.177666] <f7ea2218>] ? ext4_ind_get_blocks+0x1e8/0x5a0 [ext4]
> 8435.177685] <c034dc80>] ? end_buffer_async_write+0x0/0x1c0
> 8435.177732] <f7ea26d8>] ? ext4_get_blocks+0x108/0x2f0 [ext4]
> 8435.177780] <f7ea2faf>] ? mpage_da_map_blocks+0x9f/0x420 [ext4]
> 8435.177823] <f7dfd4c3>] ? jbd2_journal_start+0xb3/0xf0 [jbd2]
> 8435.177871] <f7eb4bf5>] ? ext4_journal_start_sb+0x65/0xa0 [ext4]
> 8435.177920] <f7ea35b5>] ? ext4_da_writepages+0x285/0x530 [ext4]
> 8435.177939] <c02e59a0>] ? __writepage+0x0/0x50
> 8435.177955] <c02e6c6e>] ? do_writepages+0x2e/0x60
> 8435.177972] <c0345ea1>] ? writeback_single_inode+0x191/0x410
> 8435.177990] <c04354b4>] ? rb_erase+0xd4/0x140
> 8435.178007] <c03465a9>] ? generic_sync_sb_inodes+0x219/0x4e0
> 8435.178023] <c03468b5>] ? sync_sb_inodes+0x45/0x60
> 8435.178038] <c03469d3>] ? writeback_inodes+0x63/0x110
> 8435.178052] <c02e5bd2>] ? wb_kupdate+0xa2/0x120
> 8435.178070] <c02e7b39>] ? __pdflush+0x149/0x2b0
> 8435.178085] <c02e7ca0>] ? pdflush+0x0/0x60
> 8435.178099] <c02e7ce4>] ? pdflush+0x44/0x60
> 8435.178113] <c02e5b30>] ? wb_kupdate+0x0/0x120
> 8435.178130] <c0270fa4>] ? kthread+0x84/0x90
> 8435.178144] <c0270f20>] ? kthread+0x0/0x90
> 8435.178159] <c0204dab>] ? kernel_thread_helper+0x7/0x1c
> 8435.178173] — end trace d3b34a28350c47e0 ]—
> 8485.176212] ------------ cut here ]------------
> 8485.176256] WARNING: at /usr/src/packages/BUILD/kernel-pae-2.6.31.12/linux-2.6.31/fs/quota/dquot.c:964 dquot_claim_space+0x8c/0x150()
> 8485.176275] Hardware name: MS-7549
> 8485.176285] Modules linked in: nfs lockd fscache nfs_acl auth_rpcgss sunrpc af_packet ip6t_LOG xt_tcpudp xt_pkttype xt_physdev ipt_LOG xt_limit rfcomm sco bridge stp vboxnetadp llc vboxnetflt bnep snd_pcm_oss vboxdrv snd_mixer_oss snd_seq_midi snd_seq_midi_event l2cap snd_seq edd ip6t_REJECT nf_conntrack_ipv6 ip6table_raw xt_NOTRACK ipt_REJECT xt_state iptable_raw iptable_filter ip6table_mangle nf_conntrack_netbios_ns nf_conntrack_ipv4 cpufreq_conservative nf_conntrack nf_defrag_ipv4 cpufreq_userspace cpufreq_powersave ip_tables ip6table_filter powernow_k8 ip6_tables x_tables quota_v2 quota_tree fuse nls_utf8 nls_cp866 vfat fat loop dm_mod snd_hda_codec_atihdmi snd_hda_codec_realtek snd_cmipci snd_hda_intel fglrx(P) gameport snd_hda_codec snd_opl3_lib snd_hwdep snd_mpu401_uart snd_pcm ppdev sr_mod snd_rawmidi btusb parport_pc snd_seq_device shpchp snd_timer bluetooth parport cdrom floppy pci_hotplug r8169 pcspkr snd snd_page_alloc k8temp thermal rfkill wmi i2c_piix4 bu
tton sg fan processor thermal_sys ext4 crc16 jbd2 ide_pci_generic atiixp ide_core ata_generic pata_atiixp
> 8485.176594] Pid: 32, comm: pdflush Tainted: P W 2.6.31.12-0.2-pae #1
> 8485.176608] Call Trace:
> 8485.176640] <c02082ea>] try_stack_unwind+0x17a/0x1a0
> 8485.176661] <c020706c>] dump_trace+0x6c/0x130
> 8485.176682] <c0207e98>] show_trace_log_lvl+0x58/0x80
> 8485.176700] <c0207ee6>] show_trace+0x26/0x40
> 8485.176719] <c069d905>] dump_stack+0x79/0x91
> 8485.176739] <c0253e58>] warn_slowpath_common+0x78/0xc0
> 8485.176758] <c0253ec1>] warn_slowpath_null+0x21/0x40
> 8485.176776] <c0370d3c>] dquot_claim_space+0x8c/0x150
> 8485.176842] <f7ecdb11>] ext4_mb_mark_diskspace_used+0x391/0x3e0 [ext4]
> 8485.176974] <f7ecf6e6>] ext4_mb_new_blocks+0x316/0x5a0 [ext4]
> 8485.177096] <f7e9edbf>] ext4_alloc_blocks+0x16f/0x270 [ext4]
> 8485.177154] <f7e9ff9e>] ext4_alloc_branch+0x8e/0x300 [ext4]
> 8485.177213] DWARF2 unwinder stuck at ext4_alloc_branch+0x8e/0x300 [ext4]
> 8485.177228]
> 8485.177237] Leftover inexact backtrace:
> 8485.177239]
> 8485.177265] <c040810d>] ? generic_make_request+0x32d/0x510
> 8485.177283] <c02dfe1d>] ? mempool_alloc_slab+0x1d/0x40
> 8485.177331] <f7ea2218>] ? ext4_ind_get_blocks+0x1e8/0x5a0 [ext4]
> 8485.177353] <c0434919>] ? radix_tree_gang_lookup_tag_slot+0x89/0xd0
> 8485.177399] <f7ea26d8>] ? ext4_get_blocks+0x108/0x2f0 [ext4]
> 8485.177446] <f7ea2faf>] ? mpage_da_map_blocks+0x9f/0x420 [ext4]
> 8485.177487] <f7dfd4c3>] ? jbd2_journal_start+0xb3/0xf0 [jbd2]
> 8485.177534] <f7eb4bf5>] ? ext4_journal_start_sb+0x65/0xa0 [ext4]
> 8485.177583] <f7ea35b5>] ? ext4_da_writepages+0x285/0x530 [ext4]
> 8485.177602] <c02e59a0>] ? __writepage+0x0/0x50
> 8485.177618] <c02e6c6e>] ? do_writepages+0x2e/0x60
> 8485.177635] <c0345ea1>] ? writeback_single_inode+0x191/0x410
> 8485.177654] <c022d8f0>] ? __ticket_spin_unlock+0x0/0x30
> 8485.177670] <c03465a9>] ? generic_sync_sb_inodes+0x219/0x4e0
> 8485.177686] <c03468b5>] ? sync_sb_inodes+0x45/0x60
> 8485.177701] <c03469d3>] ? writeback_inodes+0x63/0x110
> 8485.177715] <c02e5bd2>] ? wb_kupdate+0xa2/0x120
> 8485.177730] <c02e7b39>] ? __pdflush+0x149/0x2b0
> 8485.177745] <c02e7ca0>] ? pdflush+0x0/0x60
> 8485.177759] <c02e7ce4>] ? pdflush+0x44/0x60
> 8485.177773] <c02e5b30>] ? wb_kupdate+0x0/0x120
> 8485.177789] <c0270fa4>] ? kthread+0x84/0x90
> 8485.177804] <c0270f20>] ? kthread+0x0/0x90
> 8485.177819] <c0204dab>] ? kernel_thread_helper+0x7/0x1c
> 8485.177832] — end trace d3b34a28350c47e1 ]—

It looks like an ext4 bug, but unless you can reproduce it without
tainting your kernel, developers are not likely to look at it.

It is kernel from opensuse update repo. I spotted this after some of the kernel updates. I have two boxes with opensuse and this error appears on both.

On 04/25/2010 07:56 AM, D E wrote:
>
> lwfinger;2156918 Wrote:
>>
>> It looks like an ext4 bug, but unless you can reproduce it without
>> tainting your kernel, developers are not likely to look at it.
>
> It is kernel from opensuse update repo. I spotted this after some of
> the kernel updates. I have two boxes with opensuse and this error
> appears on both.

And your point is what? As I said, it is a kernel bug that seems to be
coming from ext4, but whatever foreign module you are loading that
taints the kernel could corrupt some kernel data structure that makes it
look like an ext4 problem. The chance of unreviewed kernel code
affecting code that is correct is why no one looks at a tainted kernel.

At a minimum, turn off quotas and try again.

Thank you. I think I just misunderstood “tainted”. I thought it means more heavy modifications - like applying some patches. As you suggested I’ll try to boot without quotas.

I can confirm now, that without quotas dmesg output is clean.

Thanks for coming back and letting us know.

On 04/27/2010 04:16 AM, Knurpht wrote:
>
> Thanks for coming back and letting us know.

If you have not done so, please file a bug report.

There is Bug 544182 already on bugzilla, but it’s still unresolved.