Recent changes (master)

Jens Axboe
2017-07-14T12:00:03Z

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(-)

---

Diff of recent changes:

diff --git a/HOWTO b/HOWTO
index 0b80a62..e544634 100644
--- a/HOWTO
+++ b/HOWTO
@@ -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

diff --git a/fio.1 b/fio.1
index bc477a2..5da9ecf 100644
--- a/fio.1
+++ b/fio.1
@@ -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