| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081 |
- What: /sys/fs/ext4/<disk>/mb_stats
- Date: March 2008
- Contact: "Theodore Ts'o" <tytso@mit.edu>
- Description:
- Controls whether the multiblock allocator should
- collect statistics, which are shown during the unmount.
- 1 means to collect statistics, 0 means not to collect
- statistics
- What: /sys/fs/ext4/<disk>/mb_group_prealloc
- Date: March 2008
- Contact: "Theodore Ts'o" <tytso@mit.edu>
- Description:
- The multiblock allocator will round up allocation
- requests to a multiple of this tuning parameter if the
- stripe size is not set in the ext4 superblock
- What: /sys/fs/ext4/<disk>/mb_max_to_scan
- Date: March 2008
- Contact: "Theodore Ts'o" <tytso@mit.edu>
- Description:
- The maximum number of extents the multiblock allocator
- will search to find the best extent
- What: /sys/fs/ext4/<disk>/mb_min_to_scan
- Date: March 2008
- Contact: "Theodore Ts'o" <tytso@mit.edu>
- Description:
- The minimum number of extents the multiblock allocator
- will search to find the best extent
- What: /sys/fs/ext4/<disk>/mb_order2_req
- Date: March 2008
- Contact: "Theodore Ts'o" <tytso@mit.edu>
- Description:
- Tuning parameter which controls the minimum size for
- requests (as a power of 2) where the buddy cache is
- used
- What: /sys/fs/ext4/<disk>/mb_stream_req
- Date: March 2008
- Contact: "Theodore Ts'o" <tytso@mit.edu>
- Description:
- Files which have fewer blocks than this tunable
- parameter will have their blocks allocated out of a
- block group specific preallocation pool, so that small
- files are packed closely together. Each large file
- will have its blocks allocated out of its own unique
- preallocation pool.
- What: /sys/fs/ext4/<disk>/inode_readahead
- Date: March 2008
- Contact: "Theodore Ts'o" <tytso@mit.edu>
- Description:
- Tuning parameter which controls the maximum number of
- inode table blocks that ext4's inode table readahead
- algorithm will pre-read into the buffer cache
- What: /sys/fs/ext4/<disk>/delayed_allocation_blocks
- Date: March 2008
- Contact: "Theodore Ts'o" <tytso@mit.edu>
- Description:
- This file is read-only and shows the number of blocks
- that are dirty in the page cache, but which do not
- have their location in the filesystem allocated yet.
- What: /sys/fs/ext4/<disk>/lifetime_write_kbytes
- Date: March 2008
- Contact: "Theodore Ts'o" <tytso@mit.edu>
- Description:
- This file is read-only and shows the number of kilobytes
- of data that have been written to this filesystem since it was
- created.
- What: /sys/fs/ext4/<disk>/session_write_kbytes
- Date: March 2008
- Contact: "Theodore Ts'o" <tytso@mit.edu>
- Description:
- This file is read-only and shows the number of
- kilobytes of data that have been written to this
- filesystem since it was mounted.
|
