| PROBE::IOBLOCK_TRACE(3stap) | IO Scheduler and block IO Taps | PROBE::IOBLOCK_TRACE(3stap) |
NAME
probe::ioblock_trace.end - Fires whenever a block I/O transfer is complete.
SYNOPSIS
probe ioblock_trace.end {}
VALUES
size
total size in bytes
p_start_sect
points to the start sector of the partition structure of
the device
q
request queue on which this bio was queued.
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
bytes_done
number of bytes transferred
name
name of the probe point
rw
binary trace for read/write request
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
bdev_contains
points to the device object which contains the partition
(when bio structure represents a partition)
idx
offset into the bio vector array phys_segments -
number of segments in this bio after physical address coalescing is
performed.
devname
block device name
sector
beginning sector for the entire bio
bdev
target block device
opf
operations and flags
CONTEXT
The process signals the transfer is done.
SEE ALSO0
| September 2026 | SystemTap Tapset Reference Ver |