probe::ioblock.end
名称
probe::ioblock.end — Fires whenever a block I/O transfer is complete.
Synopsis
ioblock.end
Values
name- name of the probe point
sector- beginning sector for the entire bio
hw_segments- number of segments after physical and DMA remapping hardware coalescing is performed
phys_segments- number of segments in this bio after physical address coalescing is performed.
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
devname- block device name
bytes_done- number of bytes transferred
error- 0 on success
size- total size in bytes
idx- offset into the bio vector array
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
rw- binary trace for read/write request
Context
The process signals the transfer is done.
