On 2019/7/22 下午12:25, Nathan Dehnel wrote: > I'm still experiencing freezes with kernel 5.2. Here's a backtrace: > [snip]
This time, there is no backtrace of btrfs functions at all, nor nfs ones.
Is the backtrace complete? If so, it would be something else causing the
problem.
Thanks,
Qu
>
>
> On Sat, May 11, 2019 at 6:21 AM Qu Wenruo <quwenruo.bt...@gmx.com> wrote:
>>
>>
>>> [362108.291969] btrfs_tree_read_lock+0xbb/0xf1
>>> [362108.291973] ? wait_woken+0x6d/0x6d
>>> [362108.291978] find_parent_nodes+0x91d/0x12b8
>>> [362108.291985] ? btrfs_find_all_roots_safe+0x9c/0x107
>>> [362108.291988] btrfs_find_all_roots_safe+0x9c/0x107
>>> [362108.291992] btrfs_find_all_roots+0x57/0x75
>>> [362108.291997] btrfs_qgroup_trace_extent_post+0x37/0x7c
>>
>> It's qgroup.
>>
>> We have upstream fix for it, 38e3eebff643 ("btrfs: honor
>> path->skip_locking in backref code").
>> It's supported to be backported for all kernels after v4.14.
>> But I'm not sure if it's backported for your kernel.
>>
>> As you're gentoo user, it shouldn't be hard to check the kernel source
>> to find if the fix is backported.
>> If not, feel free to backport for your kernel.
>>
>> Thanks,
>> Qu
>>
>>
>>> [362108.292002] btrfs_add_delayed_tree_ref+0x305/0x32b
>>
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