age_buffer_centisecs
age_buffer_centisecs:(Min: 100 Default: 1500 Max: 720000) 多長時間設置為臟數據
xfsbufd_centisecs
xfsbufd_centisecs: (Min: 50 Default: 100Max: 3000)xfsbufd掃瞄臟buffer的時間間隔
xfssyncd_centisecs
xfssyncd_centisecs: (Min: 100 Default: 3000 Max: 720000)xfssyncd 刷新時間間隔（寫到磁盤）
XFS sysctls - Debug
error_level (Min: 0 Default: 3 Max: 11)
文件系統出錯時會顯示詳細信息
– A volume knob for error reporting when internal errors occur.
– This will generate detailed messages & backtraces for filesystem shutdowns, for example.
– Current threshold（閥值） values are:
• XFS_ERRLEVEL_OFF: 0
• XFS_ERRLEVEL_LOW: 1
• XFS_ERRLEVEL_HIGH: 5
panic_mask (Min: 0 Default: 0 Max: 127)
遇到指定的錯誤時調用BUG()(調試時用)
• XFS_NO_PTAG 0
• XFS_PTAG_IFLUSH 0x00000001
• XFS_PTAG_LOGRES 0x00000002
• XFS_PTAG_AILDELETE 0x00000004
• XFS_PTAG_ERROR_REPORT 0x00000008
• XFS_PTAG_SHUTDOWN_CORRUPT 0x00000010
• XFS_PTAG_SHUTDOWN_IOERROR 0x00000020
• XFS_PTAG_SHUTDOWN_LOGERROR 0x00000040
• This option is intended for debugging only.
XFS sysctls - Compatibility
irix_symlink_mode (Min: 0 Default: 0 Max: 1)
控制符號鏈接的模式是不是0777（默認）
irix_sgid_inherit (Min: 0 Default: 0 Max: 1)
把一個和文件夾不是同一個組ID的文件，放在這個文件夾里。組ID會不會變成文件夾的組ID。（默認不會）
XFS sysctls – Attribute Inheritence
inherit_sync (Min: 0 Default: 1 Max: 1)
xfs_io 下chattr 命令設置sync標志
– Setting this to "1" will cause the "sync" flag set by the xfs_io(8) chattr command on a
directory to be inherited by files in that directory.
inherit_nodump (Min: 0 Default: 1 Max: 1)
xfs_io 下chattr 命令設置nodump標志
– Setting this to "1" will cause the "nodump" flag set by the xfs_io(8) chattr command
on a directory to be inherited by files in that directory.
inherit_noatime (Min: 0 Default: 1 Max: 1)
xfs_io 下chattr 命令設置noatime標志
– Setting this to "1" will cause the "noatime" flag set by the xfs_io(8) chattr command
on a directory to be inherited by files in that directory.
inherit_nosymlinks (Min: 0 Default: 1 Max: 1)
xfs_io 下chattr 命令設置nosymlinks標志
– Setting this to "1" will cause the "nosymlinks" flag set by the xfs_io(8) chattr
command on a directory to be inherited by files in that directory.
XFS sysctls - Misc
stats_clear (Min: 0 Default: 0 Max: 1)
清除狀態信息
設為1的話，會清除xfs系統累積的狀態，並馬上重置為0
restrict_chown (Min: 0 Default: 1 Max: 1)
控制的用戶是否能夠用chown來改變，文件的擁有者