Date: Sat, 23 Feb 2013 09:05:04 -0700 (MST) From: Warren Block <wblock@wonkity.com> To: Eitan Adler <eadler@FreeBSD.org> Cc: svn-doc-head@freebsd.org, svn-doc-all@freebsd.org, doc-committers@freebsd.org Subject: Re: svn commit: r41036 - head/en_US.ISO8859-1/books/faq Message-ID: <alpine.BSF.2.00.1302230904260.5345@wonkity.com> In-Reply-To: <201302231450.r1NEoPwK036450@svn.freebsd.org> References: <201302231450.r1NEoPwK036450@svn.freebsd.org>
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On Sat, 23 Feb 2013, Eitan Adler wrote: > Author: eadler > Date: Sat Feb 23 14:50:24 2013 > New Revision: 41036 > URL: http://svnweb.freebsd.org/changeset/doc/41036 > > Log: > Update the lock-order-reversal question > > PR: docs/174226 > Submitted by: Bas Smeelen <b.smeelen@ose.nl> > Reviewed by: Erich Dollansky <erichsfreebsdlist@alogt.com> > Reviewed by: avg > Reviewed by: bjk > Discussed with: wblock > Approved by: ??? (mentor) > > Modified: > head/en_US.ISO8859-1/books/faq/book.xml > > Modified: head/en_US.ISO8859-1/books/faq/book.xml > ============================================================================== > --- head/en_US.ISO8859-1/books/faq/book.xml Sat Feb 23 14:49:59 2013 (r41035) > +++ head/en_US.ISO8859-1/books/faq/book.xml Sat Feb 23 14:50:24 2013 (r41036) > @@ -2493,9 +2493,19 @@ kern.timecounter.hardware: TSC -> i82 > </question> > > <answer> > - <para>An answer for this question can be found in the &os; > - Glossary, see <ulink > - url="&url.books.handbook;/freebsd-glossary.html#lor-glossary">LOR</ulink>.</para> > + <para>The &os; kernel uses a number of resource locks to > + arbitrate contention for certain resources. A run-time > + lock diagnostic system found in &os.current; kernels > + (but removed for releases), called &man.witness.4;, > + detects the potential for deadlocks due to locking errors. > + (It is possible to get false positives, as &man.witness.4; > + is slightly conservative.) A true positive report > + indicates that "if you were unlucky, a deadlock would have > + happened here">.</para> > + > + <para>Problematic <acronym>LOR</acronym>s tend to get fixed > + quickly, so check &a.current.url; before posting to the > + mailing lists.</para> > </answer> > </qandaentry> I do not recall being involved with this particular question at all.
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