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329 changes: 329 additions & 0 deletions erts/doc/src/notes.xml
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</header>
<p>This document describes the changes made to the ERTS application.</p>

<section><title>Erts 5.10.1</title>

<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>
Threads created internally in the runtime system by
vanilla, fd, and spawn drivers on Windows systems could
make thread unsafe calls to <c>driver_select()</c>.</p>
<p>
Own Id: OTP-10802</p>
</item>
<item>
<p>
Threads created internally in the runtime system by the
vanilla, fd, and spawn drivers on Windows systems could
make unsafe memory accesses to driver data after port had
terminated.</p>
<p>
Own Id: OTP-10803</p>
</item>
<item>
<p>
The runtime system could crash when flushing data to
standard out or standard error on Windows.</p>
<p>
Own Id: OTP-10807</p>
</item>
<item>
<p>Bugs due to the port optimizations introduced in
erts-5.10/OTP-R16A have been fixed:</p> <list>
<item>Memory leak when terminating ports</item>
<item>Memory leak when reaching the system limit of
maximum amount of concurrently existing ports</item>
<item>Crashs due to missing, or late test of bad port
handle</item> <item>The newly introduced driver API
function <c>erl_drv_busy_msgq_limits()</c> could not be
used by dynamically linked in drivers on Windows</item>
</list>
<p>
Own Id: OTP-10809 Aux Id: OTP-10336 </p>
</item>
<item>
<p>
Fix <c>{packet,httph}</c> header capitalization for
unrecognized header fields longer than 20 charachters
such as <c>Sec-Websocket-Version</c>. The limit is simply
raised from 20 to 50 characters with the hope that valid
headers longer than 50 are not used.</p>
<p>
Own Id: OTP-10824</p>
</item>
<item>
<p>
Fix rounding issues in float_to_list/1,2. Thanks to Serge
Aleynikov</p>
<p>
Own Id: OTP-10837</p>
</item>
<item>
<p>
Fix memory leak in file driver introduced in R16A.</p>
<p>
Own Id: OTP-10841</p>
</item>
<item>
<p>A bug in an ERTS internal queue implementation could
cause the loss of a wake up signal to a consumer thread.
This has now been fixed.</p>
<p>The effect of this bug, when triggered, was often only
a small or even no delay of certain operations. This
since, threads often are woken due to other unrelated
reasons. However, if the consumer thread was not woken
due to other reasons when the bug was triggered, these
operations could be left hanging, potentially for ever.
Such effects seems to have been very rare, but we have on
at least one occasion gotten a report about such an
issue.</p>
<p>Operations potentially effected by this bug:</p>
<taglist> <tag>Inspection of memory allocation
status</tag> <item>The Erlang process calling
<c>erlang:memory/[0,1]</c>, or
<c>erlang:system_info({allocator|allocator_sizes, _})</c>
could potentially hang waiting for responses from
involved threads.</item> <tag>Async thread pool
jobs</tag> <item>An async thread pool job request and/or
reply could potentially be left hanging. In OTP this only
effected file operations, but user implemented drivers
using the async thread pool were also effected. In the
file operation case, this would typically translate into
an Erlang process potentially hanging on the file
operation.</item> <tag>Shutting down the runtime
system</tag> <item>Due to the issue with the async thread
pool mentioned above, flushing of I/O while terminating
the runtime system could also potentially hang.</item>
<tag>ETS memory deallocation</tag> <item>Scheduled jobs
handling deallocation of the main structure of an ETS
table could potentially hang. This more or less only
translates into minor memory leaks.</item> <tag>Shutting
down distribution</tag> <item>The distribution shutdown
phase used when manually shutting down the distribution,
i.e., when calling <c>net_kernel:stop()</c>, could
potentially hang.</item> </taglist>
<p>
Own Id: OTP-10854</p>
</item>
<item>
<p>
OS X Snow Leopard now only uses write, as writev does not
work properly on very large files.</p>
<p>
Own Id: OTP-10858</p>
</item>
<item>
<p>
Fixed a bug where line oriented file I/O using read_ahead
was very slow for files with very large difference in
line length.</p>
<p>
Own Id: OTP-10859</p>
</item>
<item>
<p>
In erts-5.10 (R16A) faulty hashvalues were produced for
non-ASCII atoms (characters in byte-range 128..255). This
has now been fixed and hashvalues conforms to previous
OTP releases.</p>
<p>
Own Id: OTP-10860</p>
</item>
<item>
<p>
Fixes of memory accesses that might be thread unsafe when
the runtime system has been linked against third-party
libraries for atomic memory operations during the build.
Most builds are uneffected by this bug. If triggered, the
runtime system will most likely crash more or less
immediately.</p>
<p>
Own Id: OTP-10875 Aux Id: OTP-10854 </p>
</item>
<item>
<p>
Fixed a bug where it was longer possible to give the +sws
proposal flag to non-smp emulators.</p>
<p>
Own Id: OTP-10881 Aux Id: seq12258 </p>
</item>
<item>
<p>
Faulty type to bytes read for ReadFile on Windows. This
could cause windows systems to misbehave. The correct
type is now used.</p>
<p>
Own Id: OTP-10890</p>
</item>
<item>
<p>
Change default max ports for Windows to 8192. Having a
too large value caused Windows to not be able to recover
properly. If you want to use another value, pass <c>+Q
Value</c> to erl or werl.</p>
<p>
Own Id: OTP-10892</p>
</item>
<item>
<p>
Fix rare crash on halfword vm during code loading.</p>
<p>
Own Id: OTP-10896</p>
</item>
</list>
</section>


<section><title>Improvements and New Features</title>
<list>
<item>
<p>
Tuple funs (deprecated in R15B) are no longer supported.</p>
<p>
*** POTENTIAL INCOMPATIBILITY ***</p>
<p>
Own Id: OTP-10170</p>
</item>
<item>
<p>
Added four new bifs, <c>erlang:binary_to_integer/1,2</c>,
<c>erlang:integer_to_binary/1</c>,
<c>erlang:binary_to_float/1</c> and
<c>erlang:float_to_binary/1,2</c>. These bifs work
similarly to how their list counterparts work, except
they operate on binaries. In most cases converting from
and to binaries is faster than converting from and to
lists. </p>
<p>
These bifs are auto-imported into erlang source files and
can therefore be used without the <c>erlang</c> prefix.</p>
<p>
Own Id: OTP-10300 Aux Id: kunagi-74 [74] </p>
</item>
<item>
<p>
The experimental support for packages has been removed.</p>
<p>
Own Id: OTP-10348 Aux Id: kunagi-316 [227] </p>
</item>
<item>
<p>The driver API function <seealso
marker="erl_driver#erl_drv_consume_timeslice"><c>erl_drv_consume_timeslice()</c></seealso>,
and the NIF API function <seealso
marker="erl_nif#enif_consume_timeslice"><c>enif_consume_timeslice()</c></seealso>
have been introduced.</p>
<p>These functions are provided in order to better
support co-operative scheduling, improve system
responsiveness, and to make it easier to prevent
misbehaviors of the VM due to a process or port
monopolizing a scheduler thread. They can be used when
dividing lengthy work into a number of repeated calls
without the need to use threads.</p>
<p>
Own Id: OTP-10810</p>
</item>
<item>
<p>
The list_to_integer/2 bif has been optimized when used
with bases other than 10.</p>
<p>
Own Id: OTP-10834 Aux Id: kunagi-74 [74] </p>
</item>
<item>
<p>
The git commit sha of the HEAD commit is now added to the
Erlang shell when compiling a non-released Erlang
version.</p>
<p>
Own Id: OTP-10838</p>
</item>
<item>
<p>Change caching policy for memory segment allocator.
For instance, prefer sbc segments over mbc segments,
caching policy is time-arrow aware, evicting older cached
segments to store newer segments. </p> <p>The default
number of cachable segment has been increased from five
to ten segments. This can be modified, same as before,
with the command line option <c>+MMmcs 5</c></p>
<p>Impact: Increased speed for processing on larger
objects, e.g. binaries. Slight increase of mapped and
resident memory. Tune your system with memory options to
<c>erl</c> for best performance.</p>
<p>
Own Id: OTP-10840</p>
</item>
<item>
<p>
Updated config.sub and config.guess to latest version
from gnu.org</p>
<p>
Own Id: OTP-10848</p>
</item>
<item>
<p>
Add an xcomp file for Blue Gene/Q. Thanks to Kostis
Sagonas.</p>
<p>
Own Id: OTP-10849</p>
</item>
<item>
<p>
Cleanup of documentation of the type language. Thanks to
Kostis Sagonas.</p>
<p>
Own Id: OTP-10850</p>
</item>
<item>
<p>
Change the return value of hipe_bifs:remove_refs_from/1.
Thanks to Kostis Sagonas.</p>
<p>
Own Id: OTP-10851</p>
</item>
<item>
<p>
As of ERTS-5.10/OTP-R16A node names passed in the EPMD
protocol are required to be encoded in UTF-8. Since EPMD
previously accepted latin1 encoded node names this is an
incompatibility. However, since Erlang nodes always have
required characters in node names to be 7-bit ASCII
characters (and still do require this), this
incompatibility should not effect anyone using EPMD as an
Erlang Port Mapper Daemon.</p>
<p>
*** POTENTIAL INCOMPATIBILITY ***</p>
<p>
Own Id: OTP-10872 Aux Id: OTP-10753 </p>
</item>
<item>
<p>
The +pc flag to erl can be used to set the range of
characters considered printable. This affects how the
shell and io:format("~tp",...) functionality does
heuristic string detection. More can be read in STDLIB
users guide.</p>
<p>
Own Id: OTP-10884</p>
</item>
<item>
<p>
Fix a number of type cast errors related to formatted
printing on Win64 that can potentially cause problem when
the Erlang VM exceeds 4 GB of ram. (Thanks to Blaine
Whittle for the original patch)</p>
<p>
Own Id: OTP-10887</p>
</item>
<item>
<p>
The effect of the deprecated environment variable
ERL_MAX_PORTS had been removed premeturely. It has now
been readded. Note that this is still scheduled to be
released in R17B.</p>
<p>
Own Id: OTP-10895</p>
</item>
</list>
</section>

</section>

<section><title>Erts 5.10</title>

<section><title>Fixed Bugs and Malfunctions</title>
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<p>This document describes the changes made to the asn1 application.</p>


<section><title>Asn1 2.0.1</title>

<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>
Fixed broken table constraints within a SET OF or
SEQUENCE OF for the BER backend.</p>
<p>
Own Id: OTP-10853 Aux Id: seq12245 </p>
</item>
</list>
</section>

</section>

<section><title>Asn1 2.0</title>

<section><title>Fixed Bugs and Malfunctions</title>
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2 changes: 1 addition & 1 deletion lib/asn1/vsn.mk
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#next version number to use is 2.0
ASN1_VSN = 2.0
ASN1_VSN = 2.0.1

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