0x00 DISABLE disable IPU(=default option in LFS mode)
0x01 FORCE all the time
0x02 SSR if SSR mode is activated
- 0x04 UTIL if FS utilization is over threashold
+ 0x04 UTIL if FS utilization is over threshold
0x08 SSR_UTIL if SSR mode is activated and FS utilization is over
- threashold
+ threshold
0x10 FSYNC activated in fsync path only for high performance
flash storages. IPU will be triggered only if the
# of dirty pages over min_fsync_blocks.
Contact: "Konstantin Vyshetsky" <vkon@google.com>
Description: Controls the number of discards a thread will issue at a time.
Higher number will allow the discard thread to finish its work
- faster, at the cost of higher latency for incomming I/O.
+ faster, at the cost of higher latency for incoming I/O.
What: /sys/fs/f2fs/<disk>/min_discard_issue_time
Date: December 2021
state. 2048 trials is set by default.
What: /sys/fs/f2fs/<disk>/extension_list
-Date: Feburary 2018
+Date: February 2018
Contact: "Chao Yu" <yuchao0@huawei.com>
Description: Used to control configure extension list:
- Query: cat /sys/fs/f2fs/<disk>/extension_list