2024-03-11 15:21 GMT+09:00, Sungjong Seo <sj1557.seo@xxxxxxxxxxx>:
>> This patch set changes sync dentry-by-dentry to sync dentrySet-by-
>> dentrySet, and remove some syncs that do not cause data loss. It not only
>> improves the performance of sync dentry, but also reduces the consumption
>> of storage device life.
>>
>> I used the following commands and blktrace to measure the improvements on
>> a class 10 SDXC card.
>>
>> rm -fr $mnt/dir; mkdir $mnt/dir; sync
>> time (for ((i=0;i<1000;i++));do touch $mnt/dir/${prefix}$i;done;sync
>> $mnt)
>> time (for ((i=0;i<1000;i++));do rm $mnt/dir/${prefix}$i;done;sync $mnt)
>>
>> | case | name len | create | unlink |
>> | | | time | write size | time | write size |
>> |------+----------+----------+------------+-----------+------------|
>> | 1 | 15 | 10.260s | 191KiB | 9.829s | 96KiB |
>> | 2 | 15 | 11.456s | 562KiB | 11.032s | 562KiB |
>> | 3 | 15 | 30.637s | 3500KiB | 21.740s | 2000KiB |
>> | 1 | 120 | 10.840s | 644KiB | 9.961s | 315KiB |
>> | 2 | 120 | 13.282s | 1092KiB | 12.432s | 752KiB |
>> | 3 | 120 | 45.393s | 7573KiB | 37.395s | 5500KiB |
>> | 1 | 255 | 11.549s | 1028KiB | 9.994s | 594KiB |
>> | 2 | 255 | 15.826s | 2170KiB | 13.387s | 1063KiB |
>> | 3 | 255 | 1m7.211s | 12335KiB | 0m58.517s | 10004KiB |
>>
>> case 1. disable dirsync
>> case 2. with this patch set and enable dirsync case 3. without this patch
>> set and enable dirsync
>>
>> Changes for v3
>> - [2/10] Allow deleted entry follow unused entry
>
> looks good. Thanks for your patch.
> Reviewed-by: Sungjong Seo <sj1557.seo@xxxxxxxxxxx>
Applied them to #dev, Thanks for your patch!
