Author: gjb
Date: Tue Sep 20 16:30:59 2016
New Revision: 306032
URL: https://svnweb.freebsd.org/changeset/base/306032
Log:
Document r298002, NCQ TRIM support, CAM_IOSCHED_ADATPIVE.
Submitted by: imp
Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation
Modified:
releng/11.0/release/doc/en_US.ISO8859-1/relnotes/article.xml
Modified: releng/11.0/release/doc/en_US.ISO8859-1/relnotes/article.xml
==============================================================================
--- releng/11.0/release/doc/en_US.ISO8859-1/relnotes/article.xml Tue Sep
20 16:28:57 2016 (r306031)
+++ releng/11.0/release/doc/en_US.ISO8859-1/relnotes/article.xml Tue Sep
20 16:30:59 2016 (r306032)
@@ -1620,6 +1620,30 @@
for parsing libucl-based configuration files has been added to
&man.ctld.8;.</para>
+ <para revision="298002" contrib="sponsor"
+ sponsor="&netflix;">The &man.ahci.4; driver has been updated
+ to add <acronym>NCQ</acronym> <acronym>TRIM</acronym> support
+ for drives that support it.</para>
+
+ <note>
+ <para>Drives that advertise this feature but do not properly
+ support it have been blacklisted. Systems experiencing
+ traffic problems with <acronym>NCQ</acronym>
+ <acronym>TRIM</acronym> enabled can set the
+ <literal>kern.cam.ada.%d.quirks</literal> tunable to
+ <literal>2</literal> for 512k sectors or
+ <literal>3</literal> for 4096k sectors, replacing
+ <literal>%d</literal> with the drive number.</para>
+ </note>
+
+ <para revision="298002" contrib="sponsor"
+ sponsor="&netflix;">The &man.cam.4; driver has been updated to
+ allow I/O scheduling tuning to fit workload and drive
+ characteristics. This option is off by default, and can be
+ enabled by adding <literal>option
+ CAM_IOSCHED_ADATPIVE</literal> option to the kernel
+ configuration and recompiling the kernel.</para>
+
<para revision="299371" contrib="sponsor" sponsor="&ff;">The
&man.camcontrol.8; command can manually force updating
capacity data after a disk gets resized using the reprobe
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