| 12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152 |
- What: /sys/class/bdi/<bdi>/
- Date: January 2008
- Contact: Peter Zijlstra <a.p.zijlstra@chello.nl>
- Description:
- Provide a place in sysfs for the backing_dev_info object.
- This allows us to see and set the various BDI specific variables.
- The <bdi> identifier can be either of the following:
- MAJOR:MINOR
- Device number for block devices, or value of st_dev on
- non-block filesystems which provide their own BDI, such as NFS
- and FUSE.
- default
- The default backing dev, used for non-block device backed
- filesystems which do not provide their own BDI.
- Files under /sys/class/bdi/<bdi>/
- ---------------------------------
- read_ahead_kb (read-write)
- Size of the read-ahead window in kilobytes
- reclaimable_kb (read-only)
- Reclaimable (dirty or unstable) memory destined for writeback
- to this device
- writeback_kb (read-only)
- Memory currently under writeback to this device
- dirty_kb (read-only)
- Global threshold for reclaimable + writeback memory
- bdi_dirty_kb (read-only)
- Current threshold on this BDI for reclaimable + writeback
- memory
- min_ratio (read-write)
- Minimal percentage of global dirty threshold allocated to this
- bdi. If the value written to this file would make the the sum
- of all min_ratio values exceed 100, then EINVAL is returned.
- The default is zero
|
