Provided by: systemtap-doc_2.3-1ubuntu1.4_all 

NAME
probe::ioblock_trace.end - Fires whenever a block I/O transfer is complete.
SYNOPSIS
ioblock_trace.end
VALUES
None
DESCRIPTION
name - name of the probe point q - request queue on which this bio was queued. devname - block device
name ino - i-node number of the mapped file bytes_done - number of bytes transferred 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
rw - binary trace for read/write request vcnt - bio vector count which represents number of array element
(page, offset, length) which makes up this I/O request idx - offset into the bio vector array
phys_segments - number of segments in this bio after physical address coalescing is performed. size -
total size in bytes bdev - target block device bdev_contains - points to the device object which contains
the partition (when bio structure represents a partition) p_start_sect - points to the start sector of
the partition structure of the device
CONTEXT
The process signals the transfer is done.
SystemTap Tapset Reference March 2016 PROBE::IOBLOCK_TRACE(3stap)