On 2/10/21 11:11 PM, Jens Axboe wrote: > On 2/9/21 10:07 PM, Coly Li wrote: >> Hi Jens, >> >> This is the first wave bcache patches for Linux v5.12. >> >> It is nice to see in this round we have 3 new patch contributors: >> Jianpeng Ma, Qiaowei Ren and Kai Krakow. >> >> In this series, the EXPERIMENTAL patches from Jianpeng Ma, Qiaowei Ren >> and me are initial effort to store bcache meta-data on NVDIMM namespace. >> The NVDIMM space is managed and mapped via DAX interface, and accessed >> by linear address. In this submission we store bcache journal on NVDIMM, >> in future bcache btree nodes and other meta data will be added in too, >> before we remove the EXPERIMENTAL statues. >> >> Dongdong Tao contributes a performance optimization when >> bcache cache buckets are highly fregmented, Dongdong's patch makes the >> dirty data writeback faster and from his benchmark reprots such changes >> have recognized improvement for randome write I/O thoughput and latency >> for highly fregmented buckets, and no regression for regular I/O >> observed. >> >> Kai Krakow contributes 4 patches to offload system_wq usage to separated >> btree_io_wq and bch_flush_wq. In his environment the daily backup job >> throughput increases from 60.2MB/s to 419MB/s and accomplished time >> reduced from 14h29m to 2h13m. >> >> Joe Perches also contributes a fine code stype fix which I pick for this >> submission. >> >> Please take them for Linux v5.12 merge window. > > Applied 1-6 for now, that weird situation with the user visible header > needs to get resolved before it can go any further. > Thanks for taking care of the patches and offering your opinion. I will ask you and other developers' suggestion for a proper form for the data structure definition. Coly Li
