On 2017/2/25 10:07, Jaegeuk Kim wrote:
> On 02/25, Hou Pengyang wrote:
>> On 2017/2/24 18:28, Chao Yu wrote:
>>> On 2017/2/24 18:01, Hou Pengyang wrote:
>>>> Under scenerio with large number of dirty nodes, and these nodes are
>>>> flushed
>>>> in SSR mode during cp. enough free segemts now, no need to do fggc.
>>>
>>> We'd better break out of GC flow once we encounter cp error, so additional
>>> condition judgment is not needed.
>>>
>>
>> In (ret || !has_not_enough_free_secs(sbi, sec_freed, 0)),
>> if cp return error(NOT zero), flow will goto stop directly without
>> has_not_enough_free_secs checking;
>> if cp return ok(zero), has_not_enough_free_secs would be checked.
>
> Well, I think it'd be fine to do one gc by a background thread.
>
Currently we decide whether convert a bggc to fggc by:
if (gc_type == BG_GC && has_not_enough_free_secs(sbi, sec_freed, 0)) {
gc_type = FG_GC;
So how about move up write_checkpoint before gc_type = FG_GC, like:
if (gc_type == BG_GC && has_not_enough_free_secs(sbi, sec_freed, 0)) {
write_checkpoint;
if still has_not_enough_free_secs:
gc_type = FG_GC;
else
stay BG_GC;
Thanks,
> Thanks,
>
>>
>> Thanks,
>>
>>> Thanks,
>>>
>>>>
>>>> Signed-off-by: Hou Pengyang <[email protected]>
>>>> ---
>>>> fs/f2fs/gc.c | 2 +-
>>>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>>>
>>>> diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
>>>> index 6c996e3..41bdfb7 100644
>>>> --- a/fs/f2fs/gc.c
>>>> +++ b/fs/f2fs/gc.c
>>>> @@ -959,7 +959,7 @@ int f2fs_gc(struct f2fs_sb_info *sbi, bool sync, bool
>>>> background)
>>>> * garbage collections.
>>>> */
>>>> ret = write_checkpoint(sbi, &cpc);
>>>> - if (ret)
>>>> + if (ret || !has_not_enough_free_secs(sbi, sec_freed, 0))
>>>> goto stop;
>>>> } else if (gc_type == BG_GC && !background) {
>>>> /* f2fs_balance_fs doesn't need to do BG_GC in critical
>>>> path. */
>>>>
>>>
>>>
>>> .
>>>
>>
>
> .
>
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