Recent changes (master)
The following changes since commit 43f466e667a8bcfc58c1c69b0897fe0345c34841:
parse: enable options to be marked dont-free (2017-07-12 16:44:07 -0600)
are available in the git repository at:
git://git.kernel.dk/fio.git master
for you to fetch changes up to 8f4b9f2475a4524067b6a0662aff006783919922:
Update documentation for write_hint (2017-07-13 09:39:01 -0600)
----------------------------------------------------------------
Jens Axboe (1):
Update documentation for write_hint
HOWTO | 26 ++++++++++++++++++++++---- fio.1 | 28 ++++++++++++++++++++++++---- 2 files changed, 46 insertions(+), 8 deletions(-)
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Diff of recent changes:
HOWTO +22 -4
@@ -1093,11 +1093,29 @@ I/O type **random** Advise using **FADV_RANDOM**. -.. option:: fadvise_stream=int +.. option:: write_hint=str - Use :manpage:`posix_fadvise(2)` to advise the kernel what stream ID the - writes issued belong to. Only supported on Linux. Note, this option may - change going forward. + Use :manpage:`fcntl(2)` to advise the kernel what life time to expect + from a write. Only supported on Linux, as of version 4.13. Accepted + values are: + + **none** + No particular life time associated with this file. + + **short** + Data written to this file has a short life time. + + **medium** + Data written to this file has a medium life time. + + **long** + Data written to this file has a long life time. + + **extreme** + Data written to this file has a very long life time. + + The values are all relative to each other, and no absolute meaning + should be associated with them. .. option:: offset=int
fio.1 +24 -4
@@ -564,10 +564,30 @@ Advise using \fBFADV_RANDOM\fR .RE .RE .TP -.BI fadvise_stream \fR=\fPint -Use \fBposix_fadvise\fR\|(2) to advise the kernel what stream ID the -writes issued belong to. Only supported on Linux. Note, this option -may change going forward. +.BI write_hint \fR=\fPstr +Use \fBfcntl\fR|(2) to advise the kernel what life time to expect from a write. +Only supported on Linux, as of version 4.13. The values are all relative to +each other, and no absolute meaning should be associated with them. Accepted +values are: +.RS +.RS +.TP +.B none +No particular life time associated with this file. +.TP +.B short +Data written to this file has a short life time. +.TP +.B medium +Data written to this file has a medium life time. +.TP +.B long +Data written to this file has a long life time. +.TP +.B extreme +Data written to this file has a very long life time. +.RE +.RE .TP .BI size \fR=\fPint Total size of I/O for this job. \fBfio\fR will run until this many bytes have