|PROBE::IOBLOCK.END(3stap)||IO Scheduler and block IO Taps||PROBE::IOBLOCK.END(3stap)|
probe::ioblock.end - Fires whenever a block I/O transfer is complete.
block device name
name of the probe point
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
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
number of segments in this bio after physical address coalescing is performed.
binary trace for read/write request
offset into the bio vector array
beginning sector for the entire bio
0 on success
number of segments after physical and DMA remapping hardware coalescing is performed
The process signals the transfer is done.
|May 2021||SystemTap Tapset Reference|