1PROBE::IOBLOCK.END(3stap)IO Scheduler and block IO TapsPROBE::IOBLOCK.END(3stap)
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NAME

6       probe::ioblock.end - Fires whenever a block I/O transfer is complete.
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SYNOPSIS

9       ioblock.end
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VALUES

12       flags
13           see below BIO_UPTODATE 0 ok after I/O completion BIO_RW_BLOCK 1
14           RW_AHEAD set, and read/write would block BIO_EOF 2 out-out-bounds
15           error BIO_SEG_VALID 3 nr_hw_seg valid BIO_CLONED 4 doesn't own data
16           BIO_BOUNCED 5 bio is a bounce bio BIO_USER_MAPPED 6 contains user
17           pages BIO_EOPNOTSUPP 7 not supported
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19       hw_segments
20           number of segments after physical and DMA remapping hardware
21           coalescing is performed
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23       rw
24           binary trace for read/write request
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26       ino
27           i-node number of the mapped file
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29       sector
30           beginning sector for the entire bio
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32       error
33           0 on success
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35       name
36           name of the probe point
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38       idx
39           offset into the bio vector array
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41       vcnt
42           bio vector count which represents number of array element (page,
43           offset, length) which makes up this I/O request
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45       size
46           total size in bytes
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48       opf
49           operations and flags
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51       bytes_done
52           number of bytes transferred
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54       devname
55           block device name
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57       phys_segments
58           number of segments in this bio after physical address coalescing is
59           performed.
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CONTEXT

62       The process signals the transfer is done.
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SEE ALSO

65       tapset::ioblock(3stap)
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69SystemTap Tapset Reference         May 2019          PROBE::IOBLOCK.END(3stap)