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       opf
13           operations and flags
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15       error
16           0 on success
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18       name
19           name of the probe point
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21       bytes_done
22           number of bytes transferred
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24       hw_segments
25           number of segments after physical and DMA remapping hardware
26           coalescing is performed
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28       vcnt
29           bio vector count which represents number of array element (page,
30           offset, length) which makes up this I/O request
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32       rw
33           binary trace for read/write request
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35       devname
36           block device name
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38       idx
39           offset into the bio vector array
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41       flags
42           see below BIO_UPTODATE 0 ok after I/O completion BIO_RW_BLOCK 1
43           RW_AHEAD set, and read/write would block BIO_EOF 2 out-out-bounds
44           error BIO_SEG_VALID 3 nr_hw_seg valid BIO_CLONED 4 doesn't own data
45           BIO_BOUNCED 5 bio is a bounce bio BIO_USER_MAPPED 6 contains user
46           pages BIO_EOPNOTSUPP 7 not supported
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48       phys_segments
49           number of segments in this bio after physical address coalescing is
50           performed.
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52       sector
53           beginning sector for the entire bio
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55       ino
56           i-node number of the mapped file
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58       size
59           total size in bytes
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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 2022          PROBE::IOBLOCK.END(3stap)