1168e9a76SHuang JiananWhat: /sys/fs/erofs/features/ 2168e9a76SHuang JiananDate: November 2021 3168e9a76SHuang JiananContact: "Huang Jianan" <huangjianan@oppo.com> 4168e9a76SHuang JiananDescription: Shows all enabled kernel features. 5168e9a76SHuang Jianan Supported features: 6168e9a76SHuang Jianan zero_padding, compr_cfgs, big_pcluster, chunked_file, 76967f6cbSYue Hu device_table, compr_head2, sb_chksum, ztailpacking, 86967f6cbSYue Hu dedupe, fragments. 940452ffcSHuang Jianan 1040452ffcSHuang JiananWhat: /sys/fs/erofs/<disk>/sync_decompress 1140452ffcSHuang JiananDate: November 2021 1240452ffcSHuang JiananContact: "Huang Jianan" <huangjianan@oppo.com> 138b1ac84dSHans de GoedeDescription: Control strategy of sync decompression: 148b1ac84dSHans de Goede 1540452ffcSHuang Jianan - 0 (default, auto): enable for readpage, and enable for 168b1ac84dSHans de Goede readahead on atomic contexts only. 1740452ffcSHuang Jianan - 1 (force on): enable for readpage and readahead. 1840452ffcSHuang Jianan - 2 (force off): disable for all situations. 19*db80b983SChunhai Guo 20*db80b983SChunhai GuoWhat: /sys/fs/erofs/<disk>/drop_caches 21*db80b983SChunhai GuoDate: November 2024 22*db80b983SChunhai GuoContact: "Guo Chunhai" <guochunhai@vivo.com> 23*db80b983SChunhai GuoDescription: Writing to this will drop compression-related caches, 24*db80b983SChunhai Guo currently used to drop in-memory pclusters and cached 25*db80b983SChunhai Guo compressed folios: 26*db80b983SChunhai Guo 27*db80b983SChunhai Guo - 1 : invalidate cached compressed folios 28*db80b983SChunhai Guo - 2 : drop in-memory pclusters 29*db80b983SChunhai Guo - 3 : drop in-memory pclusters and cached compressed folios 30