Date: Sat, 16 Nov 2013 15:31:46 -0500 From: Allan Jude <freebsd@allanjude.com> To: freebsd-current@freebsd.org, freebsd-doc@FreeBSD.org Subject: Re: Slow boot with 256GB of RAM? Message-ID: <5287D632.4010802@allanjude.com> In-Reply-To: <5287BB44.4020104@jrv.org> References: <5286F670.2050305@jrv.org> <5287071B.3020209@petermann-it.de> <528786C9.9070409@allanjude.com> <5287BB44.4020104@jrv.org>
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On 2013-11-16 13:36, James R. Van Artsdalen wrote:
> On 11/16/2013 8:52 AM, Allan Jude wrote:
>> I see this was in the release notes for 9.0 and 8.3, but other than
>> that, I don't see how anyone was supposed to find out about this.=20
>> Maybe it would make sense to print 'Starting memory test, set
>> hw.memtest.test=3D0 to disable' before that starts, so anyone stuck
>> waiting will have a hint about what to do.=20
A patch for the FAQ to add an entry about the hw.memtest.test=3D0 to spee=
d
up boot on machines with a lot of ram
--=20
Allan Jude
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Index: en_US.ISO8859-1/books/faq/book.xml
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- en_US.ISO8859-1/books/faq/book.xml (revision 43198)
+++ en_US.ISO8859-1/books/faq/book.xml (working copy)
@@ -3669,6 +3669,26 @@
in &man.tunefs.8;.</para>
</answer>
</qandaentry>
+
+ <qandaentry>
+ <question xml:id=3D"slow-boot-memtest">
+ <para>Why does &os; pause for a long time at boot when the
+ system has large amounts of ram?</para>
+ </question>
+
+ <answer>
+ <para>&os; does a short memory test early in the boot
+ process. This test usually only takes several seconds,
+ however if the system has many 10s or 100s of gigabytes
+ of memory it can take up to a few minutes. This test
+ can be disabled by setting the
+ <literal>hw.memtest.tests</literal> to
+ <literal>0</literal> in
+ <filename>/boot/loader.conf</filename></para>
+
+ <para>For more details, see &man.loader.conf.5;.</para>
+ </answer>
+ </qandaentry>
</qandaset>
=20
<sect1 xml:id=3D"all-about-zfs">
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