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Subject: Re: [PATCH 3/3] f2fs: fix to cover meta flush with cp_lock
To:     Jaegeuk Kim <jaegeuk@kernel.org>
CC:     <linux-f2fs-devel@lists.sourceforge.net>,
        <linux-kernel@vger.kernel.org>, <chao@kernel.org>
References: <20200527102753.15743-1-yuchao0@huawei.com>
 <20200527102753.15743-3-yuchao0@huawei.com>
 <20200527210233.GC206249@google.com>
From:   Chao Yu <yuchao0@huawei.com>
Message-ID: <23245f6e-528d-43ab-57b6-4ca16db43fe5@huawei.com>
Date:   Thu, 28 May 2020 09:23:40 +0800
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On 2020/5/28 5:02, Jaegeuk Kim wrote:
> On 05/27, Chao Yu wrote:
>> meta inode page should be flushed under cp_lock, fix it.
> 
> It doesn't matter for this case, yes?

It's not related to discard issue.

Now, I got some progress, I can reproduce that bug occasionally.

Thanks,

> 
>>
>> Signed-off-by: Chao Yu <yuchao0@huawei.com>
>> ---
>>  fs/f2fs/file.c | 2 ++
>>  1 file changed, 2 insertions(+)
>>
>> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
>> index f7de2a1da528..0fcae4d90074 100644
>> --- a/fs/f2fs/file.c
>> +++ b/fs/f2fs/file.c
>> @@ -2260,7 +2260,9 @@ static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg)
>>  		set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
>>  		break;
>>  	case F2FS_GOING_DOWN_METAFLUSH:
>> +		mutex_lock(&sbi->cp_mutex);
>>  		f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_META_IO);
>> +		mutex_unlock(&sbi->cp_mutex);
>>  		f2fs_stop_checkpoint(sbi, false);
>>  		set_sbi_flag(sbi, SBI_IS_SHUTDOWN);
>>  		break;
>> -- 
>> 2.18.0.rc1
> .
>