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       devname
20           block device name
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22       phys_segments
23           number of segments in this bio after physical address coalescing is
24           performed.
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26       sector
27           beginning sector for the entire bio
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29       name
30           name of the probe point
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32       size
33           total size in bytes
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35       vcnt
36           bio vector count which represents number of array element (page,
37           offset, length) which makes up this I/O request
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39       bytes_done
40           number of bytes transferred
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42       error
43           0 on success
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45       idx
46           offset into the bio vector array
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48       hw_segments
49           number of segments after physical and DMA remapping hardware
50           coalescing is performed
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52       ino
53           i-node number of the mapped file
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55       rw
56           binary trace for read/write request
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CONTEXT

59       The process signals the transfer is done.
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SEE ALSO

62       tapset::ioblock(3stap)
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66SystemTap Tapset Reference         June 2018         PROBE::IOBLOCK.END(3stap)