|PROBE::IOBLOCK_TRACE(3stap)||IO Scheduler and block IO Taps||PROBE::IOBLOCK_TRACE(3stap)|
probe::ioblock_trace.end - Fires whenever a block I/O transfer is complete.
points to the start sector of the partition structure of the device
binary trace for read/write request
total size in bytes
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
offset into the bio vector array phys_segments - number of segments in this bio after physical address coalescing is performed.
beginning sector for the entire bio
operations and flags
bio vector count which represents number of array element (page, offset, length) which makes up this I/O request
number of bytes transferred
i-node number of the mapped file
target block device
name of the probe point
block device name
request queue on which this bio was queued.
points to the device object which contains the partition (when bio structure represents a partition)
The process signals the transfer is done.
|May 2021||SystemTap Tapset Reference|