[Bug 15074] New: Problem with quota on ext4

[Bug 15074] New: Problem with quota on ext4

[bugzilla-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=15074

           Summary: Problem with quota on ext4
           Product: File System
           Version: 2.5
    Kernel Version: 2.6.33-rc4
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: ext4
        AssignedTo: fs_ext4@kernel-bugs.osdl.org
        ReportedBy: fantonifabio@tiscali.it
        Regression: No


I have very big syslog with always this error:
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292650] WARNING: at
fs/quota/dquot.c:984 dquot_claim_space+0x98/0x109()
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292651] Hardware name: X8SIL
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292652] Modules linked in:
xt_multiport iptable_filter ip_tables x_tables quota_v1 snd_pcm snd_timer
tpm_tis snd tpm tpm_bios evdev soundcore snd_page_alloc psmouse i2c_i801
serio_raw pcspkr i2c_core processor ext4 mbcache jbd2 crc16 sd_mod crc_t10dif
ata_generic ata_piix libata scsi_mod ide_pci_generic e1000e ide_core ehci_hcd
button thermal fan thermal_sys [last unloaded: scsi_wait_scan]
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292668] Pid: 1912, comm: flush-8:0
Tainted: G        W  2.6.33-rc4 #1
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292669] Call Trace:
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292672]  [<ffffffff8111d4cd>] ?
dquot_claim_space+0x98/0x109
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292674]  [<ffffffff8111d4cd>] ?
dquot_claim_space+0x98/0x109
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292676]  [<ffffffff81045791>] ?
warn_slowpath_common+0x77/0xa3
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292678]  [<ffffffff8111d4cd>] ?
dquot_claim_space+0x98/0x109
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292684]  [<ffffffffa00ff063>] ?
ext4_get_blocks+0x2d9/0x3a4 [ext4]
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292689]  [<ffffffffa00ff5ac>] ?
mpage_da_map_blocks+0xa4/0x579 [ext4]
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292692]  [<ffffffff810b3eb6>] ?
pagevec_lookup_tag+0x1a/0x21
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292695]  [<ffffffff810b2ab5>] ?
write_cache_pages+0x118/0x29f
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292700]  [<ffffffffa01001ea>] ?
__mpage_da_writepage+0x0/0x146 [ext4]
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292705]  [<ffffffffa00fff5d>] ?
ext4_da_writepages+0x4dc/0x6c8 [ext4]
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292708]  [<ffffffff810ffa5f>] ?
end_buffer_async_write+0x0/0x11d
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292711]  [<ffffffff810f97ca>] ?
writeback_single_inode+0xe3/0x2d6
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292713]  [<ffffffff810fa40e>] ?
writeback_inodes_wb+0x362/0x439
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292716]  [<ffffffff810fa618>] ?
wb_writeback+0x133/0x1b2
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292719]  [<ffffffff810fa884>] ?
wb_do_writeback+0x145/0x15b
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292721]  [<ffffffff810fa8cb>] ?
bdi_writeback_task+0x31/0x9d
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292724]  [<ffffffff810bfd7e>] ?
bdi_start_fn+0x0/0xd2
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292726]  [<ffffffff810bfdee>] ?
bdi_start_fn+0x70/0xd2
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292728]  [<ffffffff810bfd7e>] ?
bdi_start_fn+0x0/0xd2
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292731]  [<ffffffff8105d4cd>] ?
kthread+0x79/0x81
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292733]  [<ffffffff81009824>] ?
kernel_thread_helper+0x4/0x10
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292735]  [<ffffffff8105d454>] ?
kthread+0x0/0x81
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292737]  [<ffffffff81009820>] ?
kernel_thread_helper+0x0/0x10
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292739] ---[ end trace
4eaa2a86a8e2da7c ]---
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292751] ------------[ cut here
]------------
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292753] WARNING: at
fs/quota/dquot.c:984 dquot_claim_space+0x98/0x109()
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292755] Hardware name: X8SIL
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292755] Modules linked in:
xt_multiport iptable_filter ip_tables x_tables quota_v1 snd_pcm snd_timer
tpm_tis snd tpm tpm_bios evdev soundcore snd_page_alloc psmouse i2c_i801
serio_raw pcspkr i2c_core processor ext4 mbcache jbd2 crc16 sd_mod crc_t10dif
ata_generic ata_piix libata scsi_mod ide_pci_generic e1000e ide_core ehci_hcd
button thermal fan thermal_sys [last unloaded: scsi_wait_scan]
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292772] Pid: 1912, comm: flush-8:0
Tainted: G        W  2.6.33-rc4 #1
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292773] Call Trace:
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292775]  [<ffffffff8111d4cd>] ?
dquot_claim_space+0x98/0x109
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292777]  [<ffffffff8111d4cd>] ?
dquot_claim_space+0x98/0x109
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292780]  [<ffffffff81045791>] ?
warn_slowpath_common+0x77/0xa3
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292782]  [<ffffffff8111d4cd>] ?
dquot_claim_space+0x98/0x109
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292787]  [<ffffffffa00ff063>] ?
ext4_get_blocks+0x2d9/0x3a4 [ext4]
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292793]  [<ffffffffa00ff5ac>] ?
mpage_da_map_blocks+0xa4/0x579 [ext4]
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292795]  [<ffffffff810b3eb6>] ?
pagevec_lookup_tag+0x1a/0x21
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292798]  [<ffffffff810b2ab5>] ?
write_cache_pages+0x118/0x29f
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292803]  [<ffffffffa01001ea>] ?
__mpage_da_writepage+0x0/0x146 [ext4]
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292809]  [<ffffffffa00fff5d>] ?
ext4_da_writepages+0x4dc/0x6c8 [ext4]
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292811]  [<ffffffff810ffa5f>] ?
end_buffer_async_write+0x0/0x11d
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292814]  [<ffffffff810f97ca>] ?
writeback_single_inode+0xe3/0x2d6
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292817]  [<ffffffff810fa40e>] ?
writeback_inodes_wb+0x362/0x439
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292819]  [<ffffffff810fa618>] ?
wb_writeback+0x133/0x1b2
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292822]  [<ffffffff810fa884>] ?
wb_do_writeback+0x145/0x15b
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292824]  [<ffffffff810fa8cb>] ?
bdi_writeback_task+0x31/0x9d
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292827]  [<ffffffff810bfd7e>] ?
bdi_start_fn+0x0/0xd2
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292829]  [<ffffffff810bfdee>] ?
bdi_start_fn+0x70/0xd2
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292832]  [<ffffffff810bfd7e>] ?
bdi_start_fn+0x0/0xd2
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292834]  [<ffffffff8105d4cd>] ?
kthread+0x79/0x81
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292836]  [<ffffffff81009824>] ?
kernel_thread_helper+0x4/0x10
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292838]  [<ffffffff8105d454>] ?
kthread+0x0/0x81
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292840]  [<ffffffff81009820>] ?
kernel_thread_helper+0x0/0x10
Jan 16 22:38:35 ns3093701 kernel: [ 1247.292842] ---[ end trace
4eaa2a86a8e2da7d ]---

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[Bug 15074] Problem with quota on ext4

[bugzilla-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=15074


Tim Bauer <gt6@gmx.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |gt6@gmx.net




--- Comment #1 from Tim Bauer <gt6@gmx.net>  2010-01-29 17:27:58 ---
I can confirm this on 2.6.32.6 (built Jan 25). It's the official Archlinux
kernel26. Using these fstab options:

/dev/sda1 / ext4 defaults,noatime,usrjquota=aquota.user,jqfmt=vfsv0 0 1
/dev/sda2 /home ext4 defaults,noatime,usrjquota=aquota.user,jqfmt=vfsv0 0 1

After a couple of minutes, and lots and lots of these backtraces, the machine
remounts / readonly and spits a couple of quota and IO errors to TTY1. Here's
the backtrace:

Jan 29 01:07:52 jackfruit kernel: ------------[ cut here ]------------
Jan 29 01:07:52 jackfruit kernel: WARNING: at fs/quota/dquot.c:964 dquot_claim_
space+0x14c/0x170()
Jan 29 01:07:52 jackfruit kernel: Hardware name: System Product Name
Jan 29 01:07:52 jackfruit kernel: Modules linked in: quota_v2 quota_tree snd_se
q_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_via82xx_modem snd_via82xx sn
d_pcm_oss snd_ac97_codec snd_mixer_oss snd_mpu401 ac97_bus snd_mpu401_uart batt
ery snd_pcm snd_rawmidi fan ppdev snd_timer analog snd_seq_device ac uhci_hcd i
2c_viapro lp psmouse snd ns558 parport_pc edac_core ehci_hcd asus_atk0110
serio_raw pcspkr thermal shpchp edac_mce_amd gameport parport button k8temp
processor snd_page_alloc soundcore i2c_core sg evdev usbcore sky2 pci_hotplug
rtc_cmos rtc_core rtc_lib ext4 mbcache jbd2 crc16 sr_mod cdrom sd_mod pata_via
sata_via pata_acpi ata_generic 3w_9xxx libata scsi_mod
Jan 29 01:07:52 jackfruit kernel: Pid: 1324, comm: flush-8:0 Tainted: G       
W  2.6.32-ARCH #1
Jan 29 01:07:52 jackfruit kernel: Call Trace:
Jan 29 01:07:52 jackfruit kernel: [<ffffffff810579d3>] ?
warn_slowpath_common+0x73/0xb0
Jan 29 01:07:52 jackfruit kernel: [<ffffffff81164acc>] ?
dquot_claim_space+0x14c/0x170
Jan 29 01:07:52 jackfruit kernel: [<ffffffffa010b65b>] ?
ext4_mb_mark_diskspace_used+0x3eb/0x4c0 [ext4]
Jan 29 01:07:52 jackfruit kernel: [<ffffffffa010fbdb>] ?
ext4_mb_new_blocks+0x29b/0x5a0 [ext4]
Jan 29 01:07:52 jackfruit kernel: [<ffffffffa010473f>] ?
ext4_ext_find_extent+0x2af/0x2f0 [ext4]
Jan 29 01:07:52 jackfruit kernel: [<ffffffffa01068d0>] ?
ext4_ext_get_blocks+0xe40/0x1610 [ext4]
Jan 29 01:07:52 jackfruit kernel: [<ffffffffa010fbdb>] ? ext4_mb_new_blocks+0x2
9b/0x5a0 [ext4]
Jan 29 01:07:52 jackfruit kernel: [<ffffffffa010473f>] ? ext4_ext_find_extent+0
x2af/0x2f0 [ext4]
Jan 29 01:07:52 jackfruit kernel: [<ffffffffa01068d0>] ? ext4_ext_get_blocks+0x
e40/0x1610 [ext4]
Jan 29 01:07:52 jackfruit kernel: [<ffffffff810d5fe9>] ?
mempool_alloc+0x59/0x140
Jan 29 01:07:52 jackfruit kernel: [<ffffffffa00e44cb>] ?
ext4_get_blocks+0x1fb/0x370 [ext4]
Jan 29 01:07:52 jackfruit kernel: [<ffffffffa00e47cb>] ?
mpage_da_map_blocks+0xbb/0x450 [ext4]
Jan 29 01:07:52 jackfruit kernel: [<ffffffffa00e4e9a>] ?
ext4_da_writepages+0x33a/0x700 [ext4]
Jan 29 01:07:52 jackfruit kernel: [<ffffffff810db030>] ? __writepage+0x0/0x30
Jan 29 01:07:52 jackfruit kernel: [<ffffffff81075e04>] ?
bit_waitqueue+0x14/0xcJan 29 01:07:52 jackfruit kernel: [<ffffffff81075e04>] ?
bit_waitqueue+0x14/0xc
0
Jan 29 01:07:52 jackfruit kernel: [<ffffffff81135b03>] ?
writeback_single_inode+0xf3/0x3c0
Jan 29 01:07:52 jackfruit kernel: [<ffffffff81136b63>] ?
writeback_inodes_wb+0x403/0x5d0
Jan 29 01:07:52 jackfruit kernel: [<ffffffff81136e3d>] ?
wb_writeback+0x10d/0x1e0
Jan 29 01:07:52 jackfruit kernel: [<ffffffff811371c9>] ?
wb_do_writeback+0x1d9/0x1f0
Jan 29 01:07:52 jackfruit kernel: [<ffffffff81067e20>] ?
process_timeout+0x0/0x10
Jan 29 01:07:52 jackfruit kernel: [<ffffffff81137223>] ?
bdi_writeback_task+0x43/0xd0
Jan 29 01:07:52 jackfruit kernel: [<ffffffff810ecf80>] ? bdi_start_fn+0x0/0xf0
Jan 29 01:07:52 jackfruit kernel: [<ffffffff810ecffe>] ? bdi_start_fn+0x7e/0xf0
Jan 29 01:07:52 jackfruit kernel: [<ffffffff810ecf80>] ? bdi_start_fn+0x0/0xf0
Jan 29 01:07:52 jackfruit kernel: [<ffffffff81075b5e>] ? kthread+0x8e/0xa0
Jan 29 01:07:52 jackfruit kernel: [<ffffffff8101311a>] ? child_rip+0xa/0x20
Jan 29 01:07:52 jackfruit kernel: [<ffffffff81075ad0>] ? kthread+0x0/0xa0
Jan 29 01:07:52 jackfruit kernel: [<ffffffff81013110>] ? child_rip+0x0/0x20
Jan 29 01:07:52 jackfruit kernel: ---[ end trace 366c68d94c2ad887 ]---

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[Bug 15074] Problem with quota on ext4

[bugzilla-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=15074





--- Comment #2 from Fabio Fantoni <fantonifabio@tiscali.it>  2010-02-02 17:49:13 ---
also with rc6, if can help when i active quota give me warning about quota
journaling support on ext4 not active, this update calltrace:
Feb  2 18:36:26 ns3093701 kernel: [  155.133830] ------------[ cut here
]------------
Feb  2 18:36:26 ns3093701 kernel: [  155.133832] WARNING: at
fs/quota/dquot.c:984 dquot_claim_space+0x98/0x109()
Feb  2 18:36:26 ns3093701 kernel: [  155.133833] Hardware name: X8SIL
Feb  2 18:36:26 ns3093701 kernel: [  155.133834] Modules linked in:
xt_multiport iptable_filter ip_tables x_tables quota_v1 snd_pcm snd_timer
tpm_tis tpm tpm_bios i2c_i801 snd soundcore snd_page_alloc psmouse serio_raw
pcspkr i2c_core evdev processor ext4 mbcache jbd2 crc16 sd_mod crc_t10dif
ata_generic ata_piix libata scsi_mod ide_pci_generic ehci_hcd ide_core e1000e
button thermal fan thermal_sys [last unloaded: scsi_wait_scan]
Feb  2 18:36:26 ns3093701 kernel: [  155.133850] Pid: 1763, comm: flush-8:0
Tainted: G        W  2.6.33-rc6 #1
Feb  2 18:36:26 ns3093701 kernel: [  155.133852] Call Trace:
Feb  2 18:36:26 ns3093701 kernel: [  155.133854]  [<ffffffff8111d3b5>] ?
dquot_claim_space+0x98/0x109
Feb  2 18:36:26 ns3093701 kernel: [  155.133856]  [<ffffffff8111d3b5>] ?
dquot_claim_space+0x98/0x109
Feb  2 18:36:26 ns3093701 kernel: [  155.133858]  [<ffffffff810457ad>] ?
warn_slowpath_common+0x77/0xa3
Feb  2 18:36:26 ns3093701 kernel: [  155.133860]  [<ffffffff8111d3b5>] ?
dquot_claim_space+0x98/0x109
Feb  2 18:36:26 ns3093701 kernel: [  155.133866]  [<ffffffffa00fbdb0>] ?
vfs_dq_claim_block+0x32/0x5c [ext4]
Feb  2 18:36:26 ns3093701 kernel: [  155.133871]  [<ffffffffa00fbef9>] ?
ext4_da_update_reserve_space+0x11f/0x185 [ext4]
Feb  2 18:36:26 ns3093701 kernel: [  155.133877]  [<ffffffffa0117f3c>] ?
ext4_ext_get_blocks+0x15a5/0x1735 [ext4]
Feb  2 18:36:26 ns3093701 kernel: [  155.133880]  [<ffffffff81161a01>] ?
elv_rb_add+0x65/0x6c
Feb  2 18:36:26 ns3093701 kernel: [  155.133882]  [<ffffffff8116aac5>] ?
blk_recount_segments+0x17/0x27
Feb  2 18:36:26 ns3093701 kernel: [  155.133884]  [<ffffffff81160784>] ?
elv_merged_request+0x30/0x39
Feb  2 18:36:26 ns3093701 kernel: [  155.133887]  [<ffffffff81167e57>] ?
__make_request+0x2d0/0x428
Feb  2 18:36:26 ns3093701 kernel: [  155.133889]  [<ffffffff811666a7>] ?
generic_make_request+0x285/0x2d0
Feb  2 18:36:26 ns3093701 kernel: [  155.133891]  [<ffffffff812f1f8e>] ?
__down_write_nested+0x15/0xd1
Feb  2 18:36:26 ns3093701 kernel: [  155.133897]  [<ffffffffa00fc0b9>] ?
ext4_get_blocks+0x15a/0x23a [ext4]
Feb  2 18:36:26 ns3093701 kernel: [  155.133902]  [<ffffffffa00fc5d2>] ?
mpage_da_map_blocks+0xa4/0x579 [ext4]
Feb  2 18:36:26 ns3093701 kernel: [  155.133905]  [<ffffffff810b3fe2>] ?
pagevec_lookup_tag+0x1a/0x21
Feb  2 18:36:26 ns3093701 kernel: [  155.133907]  [<ffffffff810b2be1>] ?
write_cache_pages+0x118/0x29f
Feb  2 18:36:26 ns3093701 kernel: [  155.133912]  [<ffffffffa00fd210>] ?
__mpage_da_writepage+0x0/0x146 [ext4]
Feb  2 18:36:26 ns3093701 kernel: [  155.133918]  [<ffffffffa00fcf83>] ?
ext4_da_writepages+0x4dc/0x6c8 [ext4]
Feb  2 18:36:26 ns3093701 kernel: [  155.133920]  [<ffffffff810ac27e>] ?
find_get_pages_tag+0x46/0xeb
Feb  2 18:36:26 ns3093701 kernel: [  155.133922]  [<ffffffff810ff97b>] ?
end_buffer_async_write+0x0/0x11d
Feb  2 18:36:26 ns3093701 kernel: [  155.133926]  [<ffffffff810f96e6>] ?
writeback_single_inode+0xe3/0x2d6
Feb  2 18:36:26 ns3093701 kernel: [  155.133928]  [<ffffffff810fa32a>] ?
writeback_inodes_wb+0x362/0x439
Feb  2 18:36:26 ns3093701 kernel: [  155.133930]  [<ffffffff810fa534>] ?
wb_writeback+0x133/0x1b2
Feb  2 18:36:26 ns3093701 kernel: [  155.133933]  [<ffffffff810fa7a0>] ?
wb_do_writeback+0x145/0x15b
Feb  2 18:36:26 ns3093701 kernel: [  155.133935]  [<ffffffff810fa7e7>] ?
bdi_writeback_task+0x31/0x9d
Feb  2 18:36:26 ns3093701 kernel: [  155.133937]  [<ffffffff810bfeb6>] ?
bdi_start_fn+0x0/0xd2
Feb  2 18:36:26 ns3093701 kernel: [  155.133939]  [<ffffffff810bff26>] ?
bdi_start_fn+0x70/0xd2
Feb  2 18:36:26 ns3093701 kernel: [  155.133941]  [<ffffffff810bfeb6>] ?
bdi_start_fn+0x0/0xd2
Feb  2 18:36:26 ns3093701 kernel: [  155.133943]  [<ffffffff8105d4e9>] ?
kthread+0x79/0x81
Feb  2 18:36:26 ns3093701 kernel: [  155.133946]  [<ffffffff81009824>] ?
kernel_thread_helper+0x4/0x10
Feb  2 18:36:26 ns3093701 kernel: [  155.133948]  [<ffffffff8105d470>] ?
kthread+0x0/0x81
Feb  2 18:36:26 ns3093701 kernel: [  155.133950]  [<ffffffff81009820>] ?
kernel_thread_helper+0x0/0x10
Feb  2 18:36:26 ns3093701 kernel: [  155.133951] ---[ end trace
4eaa2a86a8e2da2e ]---

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[Bug 15074] Problem with quota on ext4

[bugzilla-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=15074


Jan Kara <jack@suse.cz> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dmonakhov@openvz.org,
                   |                            |jack@suse.cz




--- Comment #3 from Jan Kara <jack@suse.cz>  2010-02-09 14:41:25 ---
Fabio, thanks for the report. By -rc6 you mean 2.6.33-rc6?

Dmitry, are you aware of any other races in the code?

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[Bug 15074] Problem with quota on ext4

[bugzilla-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=15074





--- Comment #4 from Dmitri Monakhov <dmonakhov@openvz.org>  2010-02-09 15:10:23 ---
No, i don't know any real usecase bugs.
I do know about rw=>ro bug, but it is not happens in normal(usual) situation.
http://lkml.org/lkml/2010/1/24/25

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[Bug 15074] Problem with quota on ext4

[bugzilla-daemon]

http://bugzilla.kernel.org/show_bug.cgi?id=15074





--- Comment #5 from Fabio Fantoni <fantonifabio@tiscali.it>  2010-02-09 16:02:15 ---
yes 2.6.33-rc6, the warning on quota active (journaling support on ext4 not
active) not help? if necessary on next install i post details message

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--- Comment #6 from Dmitri Monakhov <dmonakhov@openvz.org>  2010-02-09 16:35:47 ---
Wait a minute, seems that you have write to a file system before quotaon
Is is true ? If so then you at do the wrong things because your quota
will becomes out of sync in this case.

I have a patch which fix this issue,
http://marc.info/?l=linux-ext4&m=126106648829617&w=2).
It was accepted by Jan but seems was dropped somewhere. I'm also complitly   
forgot about it. Cat you try it.
But in fact the patch just makes kernel more patient to users misbehaviour.

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--- Comment #7 from Jan Kara <jack@suse.cz>  2010-02-09 16:56:22 ---
Argh, sorry for that. I've folded that change into your patch implementing
reservation handling but then replaced reservation handling patch with a new
version from you and forgot about this update.

I've readded the patch to my tree now.

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--- Comment #8 from Jan Kara <jack@suse.cz>  2010-02-09 17:24:55 ---
Created an attachment (id=24972)
 --> (http://bugzilla.kernel.org/attachment.cgi?id=24972)
Fix warning at dquot_claim_space()

Dmitry, your patch didn't fix the whole issue for me. I also need this patch to
avoid the warnings...

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--- Comment #9 from Jan Kara <jack@suse.cz>  2010-02-09 17:27:50 ---
The bad thing about the patch is that it removes the possibility to quickly see
cases where we reserved less than we've later claimed but OTOH giving false
warnings is nasty as well...

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--- Comment #10 from Dmitri Monakhov <dmonakhov@openvz.org>  2010-02-10 06:17:36 ---
Created an attachment (id=24985)
 --> (http://bugzilla.kernel.org/attachment.cgi?id=24985)
add warning message on quotaon in case of reserved space

We can detect that space was reserved before quotaon during inides quota
initialisation. Lets print warning message about this.

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--- Comment #11 from Dmitri Monakhov <dmonakhov@openvz.org>  2010-02-10 06:37:41 ---
(In reply to comment #8)
> Created an attachment (id=24972)
 --> (http://bugzilla.kernel.org/attachment.cgi?id=24972) [details]
> Fix warning at dquot_claim_space()
> 
> Dmitry, your patch didn't fix the whole issue for me. I also need this patch to
> avoid the warnings...
This is dangerous changes because this may this remove important sanity
check. It is false(not invalid) after few seconds after quotaon.
But later it can helps us to catch a lot of bugs. I have found chown bug
only because of this check.
I've attached a patch which add warning message, but after some thougths i
comes
in to idea to add force charging a reserved space in ->initialize() method
This allow us to preserve warning in claim_space, and helps us to handle
user misbehaviour. Will prepare patch in minute.

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--- Comment #12 from Dmitri Monakhov <dmonakhov@openvz.org>  2010-02-10 08:49:56 ---
Created an attachment (id=24986)
 --> (http://bugzilla.kernel.org/attachment.cgi?id=24986)
print warning about inconsistent quota usage

Jan this patch does as much as we can in case of unexpected quota
inconsistency.
I should be applied on top of
http://marc.info/?l=linux-ext4&m=126106356824375&w=2
Should i combine it in to one patch ?
1) It charge reserved space during quotaon
2) fixup quota_reservation on claim and release.
In both cases error message will be printed(in first case it will be printed
twice)

test
dd if=/dev/zero of=/mnt bs=1k &
quotaon /mnt
killall dd
sync
I've test it and has got nice warning messages without triggering WARN(true)
in claim_rsv and free_rsv

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--- Comment #13 from Jan Kara <jack@suse.cz>  2010-02-10 19:00:20 ---
Created an attachment (id=24989)
 --> (http://bugzilla.kernel.org/attachment.cgi?id=24989)
Patch to avoid false warnings when filesystem was written before quotaon

Dmitry, I think your patch was a bit of an overengineering. But I like the idea
of keeping the WARN_ON so here's a simpler patch.

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--- Comment #14 from Dmitri Monakhov <dmonakhov@openvz.org>  2010-02-10 19:17:05 ---
Ok. Agree. There is only semantic difference between both patches.
But your definitely clear. 

BTW: i've tried to count total reservation in add_dquot_ref() in order to
give user a picture about amount of the leakage he has.
Because leackage of 500Mb look really scary :)

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Jan Kara <jack@suse.cz> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|fs_ext4@kernel-bugs.osdl.or |jack@suse.cz
                   |g                           |




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