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.