probe::ioblock.end

probe::ioblock.end
Prev	Chapter 9. IO Scheduler and block IO Tapset	Next

Name

probe::ioblock.end — Fires whenever a block I/O transfer is complete.

ioblock.end

bytes_done: number of bytes transferred
rw: binary trace for read/write request
sector: beginning sector for the entire bio
phys_segments: number of segments in this bio after physical address coalescing is performed.
error: 0 on success
name: name of the probe point
flags: see below BIO_UPTODATE 0 ok after I/O completion BIO_RW_BLOCK 1 RW_AHEAD set, and read/write would block BIO_EOF 2 out-out-bounds error BIO_SEG_VALID 3 nr_hw_seg valid BIO_CLONED 4 doesn't own data BIO_BOUNCED 5 bio is a bounce bio BIO_USER_MAPPED 6 contains user pages BIO_EOPNOTSUPP 7 not supported
idx: offset into the bio vector array
hw_segments: number of segments after physical and DMA remapping hardware coalescing is performed
opf: operations and flags
devname: block device name
size: total size in bytes
vcnt: bio vector count which represents number of array element (page, offset, length) which makes up this I/O request
ino: i-node number of the mapped file

The process signals the transfer is done.