[f2fs-dev] [Bug 214299] New: A deadlock problem caused by the quota_sem set in db6ec53b7e0

[f2fs-dev] [Bug 214299] New: A deadlock problem caused by the quota_sem set in db6ec53b7e0

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=214299

            Bug ID: 214299
           Summary: A deadlock problem caused by the quota_sem set in
                    db6ec53b7e0
           Product: File System
           Version: 2.5
    Kernel Version: 5.3.0
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: f2fs
          Assignee: filesystem_f2fs@kernel-bugs.kernel.org
          Reporter: zhuangyi1@huawei.com
        Regression: No

thread 1:                        thread 2:
f2fs_dquot_acquire
down_read(&sbi->quota_sem)
                                 f2fs_write_checkpoint
                                 block_operations
                                 f2fs_look_all
                                 down_write(&sbi->cp_rwsem)
f2fs_quota_write
f2fs_write_begin
__do_map_lock
f2fs_lock_op 
down_read(&sbi->cp_rwsem)        
                                 __need_flush_qutoa
                                 down_write(&sbi->quota_sem)

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[f2fs-dev] [Bug 214299] A deadlock problem caused by the quota_sem set in db6ec53b7e0

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=214299

Chao Yu (chao@kernel.org) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
                 CC|                            |chao@kernel.org

--- Comment #1 from Chao Yu (chao@kernel.org) ---
I've sent a patch for this bug, could you please test with it?

https://lore.kernel.org/linux-f2fs-devel/20210903023811.3458-1-chao@kernel.org/T/#u

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[f2fs-dev] [Bug 214299] A deadlock problem caused by the quota_sem set in db6ec53b7e0

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=214299

--- Comment #2 from zhuangyi1@huawei.com ---
(In reply to Chao Yu from comment #1)
> I've sent a patch for this bug, could you please test with it?
> 
> https://lore.kernel.org/linux-f2fs-devel/20210903023811.3458-1-chao@kernel.
> org/T/#u

Thanks, I will verify this patch as soon as possible.

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