probe::ioblock.end.3stap - Man Page

Fires whenever a block I/O transfer is complete.

Synopsis

ioblock.end

Values

ino

i-node number of the mapped file

error

0 on success

devname

block device name

size

total size in bytes

bytes_done

number of bytes transferred

hw_segments

number of segments after physical and DMA remapping hardware coalescing is performed

phys_segments

number of segments in this bio after physical address coalescing is performed.

name

name of the probe point

vcnt

bio vector count which represents number of array element (page, offset, length) which makes up this I/O request

opf

operations and flags

idx

offset into the bio vector array

rw

binary trace for read/write request

sector

beginning sector for the entire bio

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

Context

The process signals the transfer is done.

See Also0

tapset::ioblock(3stap)

Info

April 2025 SystemTap Tapset Reference IO Scheduler and block IO Taps