lkml.org 
[lkml]   [2017]   [Sep]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
SubjectRe: [PATCH] f2fs: clear get_ssr_cost
From
Date
The update_sit_entry provides this:
...
1658 if (!f2fs_test_bit(offset, se->ckpt_valid_map))
1659 se->ckpt_valid_blocks += del;
...
As a result, the ckpt_valid_blocks is always larger than valid_blocks.
If not correct, can you provide
the case valid_blocks larger than ckpt_valid_blocks?

On 2017/9/4 9:17, Chao Yu wrote:
> On 2017/9/1 20:14, Yunlong Song wrote:
>> se->ckpt_valid_blocks is always larger than se->valid_blocks, so
>> get_ssr_cost can be cleared.
> I think this is not correct.
>
> Thanks,
>
>> Signed-off-by: Yunlong Song <yunlong.song@huawei.com>
>> ---
>> fs/f2fs/gc.c | 11 +----------
>> 1 file changed, 1 insertion(+), 10 deletions(-)
>>
>> diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
>> index cd147e7..b226760 100644
>> --- a/fs/f2fs/gc.c
>> +++ b/fs/f2fs/gc.c
>> @@ -277,20 +277,11 @@ static unsigned int get_greedy_cost(struct f2fs_sb_info *sbi,
>> valid_blocks * 2 : valid_blocks;
>> }
>>
>> -static unsigned int get_ssr_cost(struct f2fs_sb_info *sbi,
>> - unsigned int segno)
>> -{
>> - struct seg_entry *se = get_seg_entry(sbi, segno);
>> -
>> - return se->ckpt_valid_blocks > se->valid_blocks ?
>> - se->ckpt_valid_blocks : se->valid_blocks;
>> -}
>> -
>> static inline unsigned int get_gc_cost(struct f2fs_sb_info *sbi,
>> unsigned int segno, struct victim_sel_policy *p)
>> {
>> if (p->alloc_mode == SSR)
>> - return get_ssr_cost(sbi, segno);
>> + return get_seg_entry(sbi, segno)->ckpt_valid_blocks;
>>
>> /* alloc_mode == LFS */
>> if (p->gc_mode == GC_GREEDY)
>>
>
> .
>

--
Thanks,
Yunlong Song


\
 
 \ /
  Last update: 2017-09-04 03:55    [W:0.049 / U:0.832 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site