Re: [PATCH] f2fs: change the codes of checking CP_CRC_RECOVERY_FLAG to macro

[Yunlong Song]

On 2017/2/25 2:12, Jaegeuk Kim wrote:

> 
> This is to handle only one case in which:
> 
> 1. uses old kernel without this flag,
> 2. calls fsync and gets sudden power-cut,
> 3. updates new kernel having this flag before mount.
> 
> Then, if we do not check this flag at mount time, we will lose the last fsync'ed
> node blocks.
> 

So I just send a v2 patch to only change to macro in fill_node_footer_blkaddr and
allocate_segment_by_default, these two functions are called frequently, so it is
better to use macro code. And I remain the original checking code in is_recoverable_dnode,
this function is called only once after mount, it's OK.

-- 
Thanks,
Yunlong Song