* [Bug 27652] 38-rc1: umount+rmmod cause ext4 error.
2011-01-26 20:27 [Bug 27652] New: 38-rc1: umount+rmmod cause ext4 error bugzilla-daemon
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To: linux-ext4
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Maciej Rutecki <maciej.rutecki@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Blocks| |27352
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^ permalink raw reply [flat|nested] 19+ messages in thread* [Bug 27652] 38-rc1: umount+rmmod cause ext4 error.
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From: bugzilla-daemon @ 2011-01-26 20:41 UTC (permalink / raw)
To: linux-ext4
https://bugzilla.kernel.org/show_bug.cgi?id=27652
Eric Sandeen <sandeen@redhat.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |sandeen@redhat.com
--- Comment #1 from Eric Sandeen <sandeen@redhat.com> 2011-01-26 20:41:05 ---
I believe patches have been sent that should fix this; there were
2 module unloading regressions in .37, both fixed.
If you can test with:
http://marc.info/?l=linux-ext4&m=129546975702198&w=2
and
http://marc.info/?l=linux-ext4&m=129527644524410&w=2
that'd be great.
Thanks,
-Eric
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From: bugzilla-daemon @ 2011-01-28 6:01 UTC (permalink / raw)
To: linux-ext4
https://bugzilla.kernel.org/show_bug.cgi?id=27652
Tao Ma <tm@tao.ma> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |tm@tao.ma
--- Comment #2 from Tao Ma <tm@tao.ma> 2011-01-28 06:01:10 ---
ok, so I have applied the 2 patches. And now I did hit another bug every time,
I have tried to revert these 2 patches. And it still show up every time. I use
38-rc2 now. So Maciej, is it necessary to open another bug for it?
BUG: unable to handle kernel NULL pointer dereference at 0000000000000020
IP: [<ffffffff8233d343>] _raw_spin_lock_irqsave+0x11/0x22
PGD 12292c067 PUD 10fdb6067 PMD 0
Oops: 0002 [#1] SMP
last sysfs file: /sys/devices/pci0000:00/0000:00:19.0/irq
CPU 1
Modules linked in: ext4(-) jbd2 ipv6 autofs4 hidp rfcomm l2cap crc16 bluetooth
rfkill ocfs2_dlmfs ocfs2_stack_o2cb ocfs2_dlm ocfs2_nodemanager ocfs2_stackglue
configfs lockd sunrpc cpufreq_ondemand acpi_cpufreq dm_mirror video sbs sbshc
battery acpi_memhotplug ac lp sg snd_hda_codec_analog snd_hda_intel
snd_hda_codec snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq
snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm option usb_wwan usbserial
rtc_cmos tpm_tis snd_timer snd soundcore tpm pcspkr i2c_i801 parport_pc e1000e
serio_raw dcdbas shpchp rtc_core rtc_lib i2c_core parport snd_page_alloc button
tpm_bios dm_region_hash dm_log dm_mod usb_storage ahci libahci libata sd_mod
scsi_mod ext3 jbd uhci_hcd ohci_hcd ehci_hcd [last unloaded: microcode]
Pid: 4015, comm: rmmod Not tainted 2.6.38-rc2+ #30 0V4W66/OptiPlex 780
RIP: 0010:[<ffffffff8233d343>] [<ffffffff8233d343>]
_raw_spin_lock_irqsave+0x11/0x22
RSP: 0018:ffff88010fdbbe48 EFLAGS: 00010046
RAX: 0000000000000246 RBX: ffff88010fdbbe98 RCX: 00000000c0000100
RDX: 0000000000000100 RSI: ffff88010fdbbe98 RDI: 0000000000000020
RBP: ffff88010fdbbe48 R08: ffff88010fdba000 R09: ffff8800cfa0da70
R10: ffffffff82069498 R11: 0000000000000000 R12: 0000000000000020
R13: 0000000000000002 R14: 00007fffa52c5c60 R15: 0000000000000880
FS: 00007f7dd0d016e0(0000) GS:ffff8800cfa40000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000020 CR3: 000000011dc48000 CR4: 00000000000406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process rmmod (pid: 4015, threadinfo ffff88010fdba000, task ffff88012271e180)
Stack:
ffff88010fdbbe88 ffffffff82055ee2 ffffffff82069498 ffff88010fdbbe98
ffff88010fdbbe98 ffffffffa04d8440 0000000000000880 00007fffa52c5c60
ffff88010fdbbed8 ffffffffa04ca2cc 0000000000000000 ffff88012271e180
Call Trace:
[<ffffffff82055ee2>] prepare_to_wait+0x25/0x7b
[<ffffffff82069498>] ? __try_stop_module+0x0/0x3d
[<ffffffffa04ca2cc>] ext4_exit_fs+0x94/0x112 [ext4]
[<ffffffff82055cdf>] ? autoremove_wake_function+0x0/0x3d
[<ffffffff82067bce>] sys_delete_module+0x1b5/0x218
[<ffffffff8207506f>] ? audit_syscall_entry+0x187/0x1ba
[<ffffffff82002a6b>] system_call_fastpath+0x16/0x1b
Code: 1f 44 00 00 b8 00 01 00 00 f0 66 0f c1 07 38 e0 74 06 f3 90 8a 07 eb f6
c9 c3 55 48 89 e5 0f 1f 44 00 00 9c 58 fa ba 00 01 00 00 <f0> 66 0f c1 17 38 f2
74 06 f3 90 8a 17 eb f6 c9 c3 55 48 89 e5
RIP [<ffffffff8233d343>] _raw_spin_lock_irqsave+0x11/0x22
RSP <ffff88010fdbbe48>
CR2: 0000000000000020
---[ end trace ec9d834b678544aa ]---
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^ permalink raw reply [flat|nested] 19+ messages in thread* [Bug 27652] 38-rc1: umount+rmmod cause ext4 error.
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From: bugzilla-daemon @ 2011-01-28 17:15 UTC (permalink / raw)
To: linux-ext4
https://bugzilla.kernel.org/show_bug.cgi?id=27652
--- Comment #3 from Tao Ma <tm@tao.ma> 2011-01-28 09:51:52 ---
Just tested with 37+the 2 patches. Still the same error.
So it isn't a 38 problem really.
BUG: unable to handle kernel NULL pointer dereference at 0000000000000020
IP: [<ffffffff8233dabb>] _raw_spin_lock_irqsave+0x11/0x22
PGD 122b58067 PUD 122594067 PMD 0
Oops: 0002 [#1] SMP
last sysfs file: /sys/devices/virtual/misc/autofs/dev
CPU 1
Modules linked in: ext4(-) jbd2 ipv6 autofs4 hidp rfcomm l2cap crc16 bluetooth
rfkill ocfs2_dlmfs ocfs2_stack_o2cb ocfs2_dlm ocfs2_nodemanager ocfs2_stackglue
configfs cpufreq_ondemand acpi_cpufreq dm_mirror video output sbs sbshc battery
acpi_memhotplug ac lp sg snd_hda_codec_analog snd_hda_intel snd_hda_codec
snd_seq_dummy snd_seq_oss option usb_wwan snd_seq_midi_event snd_seq
snd_seq_device snd_pcm_oss usbserial snd_mixer_oss snd_pcm snd_timer rtc_cmos
snd rtc_core tpm_tis tpm i2c_i801 shpchp parport_pc parport serio_raw button
soundcore rtc_lib tpm_bios pcspkr dcdbas e1000e i2c_core snd_page_alloc
dm_region_hash dm_log dm_mod usb_storage ahci libahci libata sd_mod scsi_mod
ext3 jbd uhci_hcd ohci_hcd ehci_hcd
Pid: 4717, comm: rmmod Not tainted 2.6.37+ #2 0V4W66/OptiPlex 780
RIP: 0010:[<ffffffff8233dabb>] [<ffffffff8233dabb>]
_raw_spin_lock_irqsave+0x11/0x22
RSP: 0018:ffff88011f7ade48 EFLAGS: 00010046
RAX: 0000000000000246 RBX: ffff88011f7ade98 RCX: 00000000c0000100
RDX: 0000000000000100 RSI: ffff88011f7ade98 RDI: 0000000000000020
RBP: ffff88011f7ade48 R08: ffff88011f7ac000 R09: ffff8800cfa0da70
R10: ffff8800cfa51a00 R11: ffff88011f7add48 R12: 0000000000000020
R13: 0000000000000002 R14: 00007fff3d3ad400 R15: 0000000000000880
FS: 00007fe07ff0e6e0(0000) GS:ffff8800cfa40000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000020 CR3: 000000011ee14000 CR4: 00000000000406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process rmmod (pid: 4717, threadinfo ffff88011f7ac000, task ffff88012358f8d0)
Stack:
ffff88011f7ade88 ffffffff82056d4e ffffffff8206a6e4 ffff88011f7ade98
ffff88011f7ade98 ffffffffa0441500 0000000000000880 00007fff3d3ad400
ffff88011f7aded8 ffffffffa0433428 0000000000000000 ffff88012358f8d0
Call Trace:
[<ffffffff82056d4e>] prepare_to_wait+0x25/0x7b
[<ffffffff8206a6e4>] ? __try_stop_module+0x0/0x3d
[<ffffffffa0433428>] ext4_exit_fs+0x94/0x112 [ext4]
[<ffffffff82056b4b>] ? autoremove_wake_function+0x0/0x3d
[<ffffffff82069127>] sys_delete_module+0x1b5/0x218
[<ffffffff820c26f9>] ? do_munmap+0x2e2/0x318
[<ffffffff820767db>] ? audit_syscall_entry+0x1d6/0x209
[<ffffffff82002aeb>] system_call_fastpath+0x16/0x1b
Code: 1f 44 00 00 b8 00 01 00 00 f0 66 0f c1 07 38 e0 74 06 f3 90 8a 07 eb f6
c9 c3 55 48 89 e5 0f 1f 44 00 00 9c 58 fa ba 00 01 00 00 <f0> 66 0f c1 17 38 f2
74 06 f3 90 8a 17 eb f6 c9 c3 55 48 89 e5
RIP [<ffffffff8233dabb>] _raw_spin_lock_irqsave+0x11/0x22
RSP <ffff88011f7ade48>
CR2: 0000000000000020
---[ end trace e0bdca5906fdcbe6 ]---
--- Comment #4 from Eric Sandeen <sandeen@redhat.com> 2011-01-28 17:15:01 ---
Is that last oops with or without the patches I pointed at?
That might be in here:
static void ext4_destroy_lazyinit_thread(void)
{
/*
* If thread exited earlier
* there's nothing to be done.
*/
if (!ext4_li_info)
return;
ext4_clear_request_list();
while (ext4_li_info->li_task) {
wake_up(&ext4_li_info->li_wait_daemon);
wait_event(ext4_li_info->li_wait_task,
ext4_li_info->li_task == NULL);
}
}
> BUG: unable to handle kernel NULL pointer dereference at 0000000000000020
li_wait_task is 0x20 into the ext4_lazy_init struct... did ext4_li_info go
away?
It does get freed and set to NULL when the lazyinit thread exits. I'm guessing
we need a little judicial application of ext4_li_mtx in the teardown thread.
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^ permalink raw reply [flat|nested] 19+ messages in thread* [Bug 27652] 38-rc1: umount+rmmod cause ext4 error.
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To: linux-ext4
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--- Comment #5 from Eric Sandeen <sandeen@redhat.com> 2011-01-28 17:32:13 ---
I could also be off base ;) Is the filesystem under test created with the
lazy_itable_init feature?
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From: bugzilla-daemon @ 2011-01-28 22:07 UTC (permalink / raw)
To: linux-ext4
https://bugzilla.kernel.org/show_bug.cgi?id=27652
--- Comment #6 from Eric Sandeen <sandeen@redhat.com> 2011-01-28 22:07:53 ---
Ok it is in fact lazyinit uninit that's falling down, the wait_event is waiting
on something that gets freed.
This fixes it up for me:
Index: linux-2.6/fs/ext4/super.c
===================================================================
--- linux-2.6.orig/fs/ext4/super.c
+++ linux-2.6/fs/ext4/super.c
@@ -77,6 +77,7 @@ static struct dentry *ext4_mount(struct
const char *dev_name, void *data);
static void ext4_destroy_lazyinit_thread(void);
static void ext4_unregister_li_request(struct super_block *sb);
+static void ext4_clear_request_list(void);
#if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) &&
defined(CONFIG_EXT4_USE_FOR_EXT23)
static struct file_system_type ext3_fs_type = {
@@ -2704,6 +2705,8 @@ static void ext4_unregister_li_request(s
mutex_unlock(&ext4_li_info->li_list_mtx);
}
+static struct task_struct *ext4_lazyinit_task;
+
/*
* This is the function where ext4lazyinit thread lives. It walks
* through the request list searching for next scheduled filesystem.
@@ -2772,6 +2775,10 @@ cont_thread:
if (time_before(jiffies, next_wakeup))
schedule();
finish_wait(&eli->li_wait_daemon, &wait);
+ if (kthread_should_stop()) {
+ ext4_clear_request_list();
+ goto exit_thread;
+ }
}
exit_thread:
@@ -2796,6 +2803,7 @@ exit_thread:
wake_up(&eli->li_wait_task);
kfree(ext4_li_info);
+ ext4_lazyinit_task = NULL;
ext4_li_info = NULL;
mutex_unlock(&ext4_li_mtx);
@@ -2818,11 +2826,10 @@ static void ext4_clear_request_list(void
static int ext4_run_lazyinit_thread(void)
{
- struct task_struct *t;
-
- t = kthread_run(ext4_lazyinit_thread, ext4_li_info, "ext4lazyinit");
- if (IS_ERR(t)) {
- int err = PTR_ERR(t);
+ ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread,
+ ext4_li_info, "ext4lazyinit");
+ if (IS_ERR(ext4_lazyinit_task)) {
+ int err = PTR_ERR(ext4_lazyinit_task);
ext4_clear_request_list();
del_timer_sync(&ext4_li_info->li_timer);
kfree(ext4_li_info);
@@ -2976,13 +2983,7 @@ static void ext4_destroy_lazyinit_thread
if (!ext4_li_info)
return;
- ext4_clear_request_list();
^ permalink raw reply [flat|nested] 19+ messages in thread* [Bug 27652] 38-rc1: umount+rmmod cause ext4 error.
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From: bugzilla-daemon @ 2011-01-29 12:03 UTC (permalink / raw)
To: linux-ext4
https://bugzilla.kernel.org/show_bug.cgi?id=27652
Florian Mickler <florian@mickler.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |florian@mickler.org
Resolution| |PATCH_ALREADY_AVAILABLE
--- Comment #7 from Florian Mickler <florian@mickler.org> 2011-01-29 12:02:12 ---
Patch: https://bugzilla.kernel.org/show_bug.cgi?id=27652#c6
Tao Ma, does this work for you too?
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From: bugzilla-daemon @ 2011-01-30 2:36 UTC (permalink / raw)
To: linux-ext4
https://bugzilla.kernel.org/show_bug.cgi?id=27652
--- Comment #8 from Tao Ma <tm@tao.ma> 2011-01-30 02:36:58 ---
(In reply to comment #7)
> Patch: https://bugzilla.kernel.org/show_bug.cgi?id=27652#c6
>
> Tao Ma, does this work for you too?
Hi sorry for the delay.
So the patch works for the kernel panic.
Reported-and-Tested-by: Tao Ma <boyu.mt@taobao.com>
As for the original bug, it doesn't help. I can still get the error message.
slab error in kmem_cache_destroy(): cache `ext4_inode_cache': Can't free all
objects
Pid: 4674, comm: rmmod Not tainted 2.6.38-rc2+ #1
Call Trace:
[<ffffffff820d61ac>] ? kmem_cache_destroy+0x83/0xc7
[<ffffffffa03a9000>] ? destroy_inodecache+0x15/0x17 [ext4]
[<ffffffffa03c7264>] ? ext4_exit_fs+0x30/0x60 [ext4]
[<ffffffff82067bce>] ? sys_delete_module+0x1b5/0x218
[<ffffffff8207506f>] ? audit_syscall_entry+0x187/0x1ba
[<ffffffff82002a6b>] ? system_call_fastpath+0x16/0x1b
SLAB: cache with size 888 has lost its name
And as I pointed in the original mail, I have done some basic investigation and
it looks as if it is introduced by Nick's new ext4_i_callback.
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To: linux-ext4
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--- Comment #9 from Tao Ma <tm@tao.ma> 2011-01-30 02:41:57 ---
An off-topic question. How can I reopen this bug? I can't find a button to
reopen it to 'New' or 'Not Fixed'?
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From: bugzilla-daemon @ 2011-01-30 19:47 UTC (permalink / raw)
To: linux-ext4
https://bugzilla.kernel.org/show_bug.cgi?id=27652
Florian Mickler <florian@mickler.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|PATCH_ALREADY_AVAILABLE |
--- Comment #10 from Florian Mickler <florian@mickler.org> 2011-01-30 19:47:35 ---
Well, the bugzilla could use a little love. Only the reporter or an obscure
group of people can change the status of bugs (as far as I know). But it is
also not possible to change the reporter. Don't know. Here you go...
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Florian Mickler <florian@mickler.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |NEW
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From: bugzilla-daemon @ 2011-01-31 16:08 UTC (permalink / raw)
To: linux-ext4
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--- Comment #11 from Eric Sandeen <sandeen@redhat.com> 2011-01-31 16:07:56 ---
Seems we have about 4 regressions all tracked in 1 bugzilla, sadly. 1 bug per
regression would work better... though partly my fault for getting OT on the
original bug.
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2011-01-31 17:57 ` bugzilla-daemon
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17 siblings, 0 replies; 19+ messages in thread
From: bugzilla-daemon @ 2011-01-31 17:55 UTC (permalink / raw)
To: linux-ext4
https://bugzilla.kernel.org/show_bug.cgi?id=27652
--- Comment #12 from Florian Mickler <florian@mickler.org> 2011-01-31 17:55:30 ---
No problem, the regression team is up to a severe game of last man standing :)
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^ permalink raw reply [flat|nested] 19+ messages in thread* [Bug 27652] 38-rc1: umount+rmmod cause ext4 error.
2011-01-26 20:27 [Bug 27652] New: 38-rc1: umount+rmmod cause ext4 error bugzilla-daemon
` (12 preceding siblings ...)
2011-01-31 17:55 ` bugzilla-daemon
@ 2011-01-31 17:57 ` bugzilla-daemon
2011-02-09 2:01 ` bugzilla-daemon
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From: bugzilla-daemon @ 2011-01-31 17:57 UTC (permalink / raw)
To: linux-ext4
https://bugzilla.kernel.org/show_bug.cgi?id=27652
--- Comment #13 from Florian Mickler <florian@mickler.org> 2011-01-31 17:57:09 ---
Ignore-Patch: https://bugzilla.kernel.org/show_bug.cgi?id=27652#c6
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^ permalink raw reply [flat|nested] 19+ messages in thread* [Bug 27652] 38-rc1: umount+rmmod cause ext4 error.
2011-01-26 20:27 [Bug 27652] New: 38-rc1: umount+rmmod cause ext4 error bugzilla-daemon
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2011-01-31 17:57 ` bugzilla-daemon
@ 2011-02-09 2:01 ` bugzilla-daemon
2011-02-09 4:50 ` bugzilla-daemon
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From: bugzilla-daemon @ 2011-02-09 2:01 UTC (permalink / raw)
To: linux-ext4
https://bugzilla.kernel.org/show_bug.cgi?id=27652
--- Comment #14 from Tao Ma <tm@tao.ma> 2011-02-09 02:01:04 ---
http://marc.info/?l=linux-fsdevel&m=129718595331581&w=2
I have tested this patch and it can resolve this bug. So please close it.
Thanks.
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^ permalink raw reply [flat|nested] 19+ messages in thread* [Bug 27652] 38-rc1: umount+rmmod cause ext4 error.
2011-01-26 20:27 [Bug 27652] New: 38-rc1: umount+rmmod cause ext4 error bugzilla-daemon
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2011-02-09 2:01 ` bugzilla-daemon
@ 2011-02-09 4:50 ` bugzilla-daemon
2011-02-09 9:42 ` bugzilla-daemon
2011-02-12 22:39 ` bugzilla-daemon
17 siblings, 0 replies; 19+ messages in thread
From: bugzilla-daemon @ 2011-02-09 4:50 UTC (permalink / raw)
To: linux-ext4
https://bugzilla.kernel.org/show_bug.cgi?id=27652
Florian Mickler <florian@mickler.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |PATCH_ALREADY_AVAILABLE
--- Comment #15 from Florian Mickler <florian@mickler.org> 2011-02-09 04:50:23 ---
Patch: http://marc.info/?l=linux-fsdevel&m=129718595331581&w=2
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^ permalink raw reply [flat|nested] 19+ messages in thread* [Bug 27652] 38-rc1: umount+rmmod cause ext4 error.
2011-01-26 20:27 [Bug 27652] New: 38-rc1: umount+rmmod cause ext4 error bugzilla-daemon
` (15 preceding siblings ...)
2011-02-09 4:50 ` bugzilla-daemon
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2011-02-12 22:39 ` bugzilla-daemon
17 siblings, 0 replies; 19+ messages in thread
From: bugzilla-daemon @ 2011-02-09 9:42 UTC (permalink / raw)
To: linux-ext4
https://bugzilla.kernel.org/show_bug.cgi?id=27652
--- Comment #16 from Rafael J. Wysocki <rjw@sisk.pl> 2011-02-09 09:42:53 ---
Handled-By : Boaz Harrosh <bharrosh@panasas.com>
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^ permalink raw reply [flat|nested] 19+ messages in thread* [Bug 27652] 38-rc1: umount+rmmod cause ext4 error.
2011-01-26 20:27 [Bug 27652] New: 38-rc1: umount+rmmod cause ext4 error bugzilla-daemon
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2011-02-09 9:42 ` bugzilla-daemon
@ 2011-02-12 22:39 ` bugzilla-daemon
17 siblings, 0 replies; 19+ messages in thread
From: bugzilla-daemon @ 2011-02-12 22:39 UTC (permalink / raw)
To: linux-ext4
https://bugzilla.kernel.org/show_bug.cgi?id=27652
Rafael J. Wysocki <rjw@sisk.pl> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |CLOSED
Resolution|PATCH_ALREADY_AVAILABLE |CODE_FIX
--- Comment #17 from Rafael J. Wysocki <rjw@sisk.pl> 2011-02-12 22:38:59 ---
Fixed by commit d863b50ab01333659314c2034890cb76d9fdc3c7 .
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^ permalink raw reply [flat|nested] 19+ messages in thread