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diff --git a/erts/doc/src/notes.xml b/erts/doc/src/notes.xml index e8a7d88f9e..5ca387ffd8 100644 --- a/erts/doc/src/notes.xml +++ b/erts/doc/src/notes.xml @@ -31,6 +31,761 @@ </header> <p>This document describes the changes made to the ERTS application.</p> +<section><title>Erts 10.4.4</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + An invalid value test caused the socket:setopt(Socket, + ip, add_membership, ip_mreq()) to fail with badarg. The + same for drop_membership.</p> + <p> + Own Id: OTP-15908 Aux Id: ERL-980 </p> + </item> + <item> + <p> + Fixed bug causing VM crash when doing textual dump of a + process containing an unhandled monitor down signal. + Textual process dumps can be done with + <c>erlang:system_info(procs)</c>, trace feature + <c>process_dump</c>, Erlang shell break menu and a + crashdump. Bug exist since OTP 21.0.</p> + <p> + Own Id: OTP-15909 Aux Id: ERL-979 </p> + </item> + <item> + <p><c>lists:subtract/2</c> would produce incorrect + results for some inputs on 64-bit platforms.</p> + <p> + Own Id: OTP-15938 Aux Id: ERL-986 </p> + </item> + <item> + <p>Fixed a bug in the loader that was similar to + <c>OTP-15938</c>, yielding incorrect code for some inputs + on 64-bit platforms.</p> + <p> + Own Id: OTP-15939</p> + </item> + <item> + <p> + Fixed bug causing scheduler threads in rare cases to + block spinnning indefinitely. Bug exists since OTP 21.0.</p> + <p> + Own Id: OTP-15941 Aux Id: PR-2313 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.4.3</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p>Fixed a buffer overflow when + <c>binary_to_existing_atom/2</c> and + <c>list_to_existing_atom/2</c> was used with the + <c>latin1</c> encoding.</p> + <p> + Own Id: OTP-15819 Aux Id: ERL-944 </p> + </item> + <item> + <p> + The runtime system disconnected a connection if it + received an <c>exit/2</c> signal where the recipient was + a process on an old incarnation of the current node. That + is, the receiving node had the same node name, but + another "creation" number. The signal will now just be + dropped since the receiving process no longer exists.</p> + <p> + Own Id: OTP-15867 Aux Id: ERIERL-373 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.4.2</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Fixed <c>process_info(Pid,reductions)</c> to not + categorically increase reduction count of the measured + process <c>Pid</c>. Repeated reduction measure of an idle + process will most often (but not guaranteed) return the + same value, like it behaved before OTP 21.3.8.</p> + <p> + Own Id: OTP-15865 Aux Id: ERL-964 </p> + </item> + <item> + <p>Fixed an incorrect load-time optimization that could + cause a crash when extracting deeply nested tuple + elements.</p> + <p> + Own Id: OTP-15871 Aux Id: ERIERL-374 </p> + </item> + <item> + <p> + Fix bug causing VM crash when pressing P for "proc info" + in Erlang shell break menu. Bug exists since OTP 22.0.</p> + <p> + Own Id: OTP-15873 Aux Id: ERL-965 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.4.1</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p>In nested use of <c>try</c>/<c>catch</c>, rethrowing + an exception using <c>erlang:raise/3</c> with a different + class would not always be able to change the class of the + exception.</p> + <p> + Own Id: OTP-15834 Aux Id: ERIERL-367 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.4</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Do not allocate new bitstring/binary when an empty binary + is appended.</p> + <p> + Own Id: OTP-15535 Aux Id: PR-2055 </p> + </item> + <item> + <p> + Document that <c>process_info(_, current_function)</c> + can return <c>{current_function, undefined}</c> in case + of execution of native code.</p> + <p> + Own Id: OTP-15543 Aux Id: PR-2089 </p> + </item> + <item> + <p> + Fixed bug in <c>ets:select</c>, <c>ets:match</c> and + friends which could cause the table to remain fixated (as + if <c>ets:safe_fixtable</c> had been called) after the + call returned. This could happen for <c>protected</c> + tables if another concurrent running process transferred + table ownership to the process during its + ets:select/match call. Ownership can be transferred using + either <c>ets:give_away</c> or the <c>heir</c> table + option.</p> + <p> + Own Id: OTP-15672</p> + </item> + <item> + <p>Fixed a Windows-specific bug in <c>file:list_dir/1</c> + that caused it to misbehave on network shares.</p> + <p> + Own Id: OTP-15693</p> + </item> + <item> + <p> + Fixed bug when calling <c>enif_whereis_*</c> from NIF + resource destructor. Symptoms could be emulator crash or + hanging scheduler threads.</p> + <p> + Own Id: OTP-15694 Aux Id: ERL-863 </p> + </item> + <item> + <p>Fixed a bug in the error case of <c>apply/3</c>, where + the exception would erroneously have an empty argument + list in some cases.</p> + <p> + Own Id: OTP-15698</p> + </item> + <item> + <p>A bug has been fixed in the <c>maps</c> implementation + that could cause a crash or memory usage to grow until + the machine ran out of memory. This could happen when + inserting a new key-value pair with a key <c>K1</c> + containing a binary <c>B1</c> into a map <c>M</c> having + a key <c>K2</c> with a binary <c>B2</c> if the following + conditions were met:</p> <list> <item><c>B1 =/= + B2</c></item> <item><c>size(B1) >= 4294967296</c></item> + <item><c>size(B2) >= 4294967296</c></item> + <item><c>size(M) >= 32</c></item> <item><c>(size(B1) rem + 4294967296) == (size(B2) rem 4294967296)</c></item> + <item>the first <c>(size(B1) rem 4294967296)</c> bytes + are the same both in <c>B1</c> and <c>B2</c></item> + <item>substituting <c>B1</c> in <c>K1</c> with <c>B2</c> + would create a term with the same value as + <c>K2</c></item> </list> <p>The root cause of the problem + is that the <c>maps</c> implementation only hashed the + first <c>(X rem 4294967296)</c> bytes of binaries so that + different binaries could get the same hash value + independently of the hash seed.</p> + <p> + Own Id: OTP-15707</p> + </item> + <item> + <p> + <c>term_to_binary()</c> and distributed sends will now + throw a <c>system_limit</c> exception instead of + producing erroneous results when trying to encode a + binary larger than 4 GB.</p> + <p> + Own Id: OTP-15708</p> + </item> + <item> + <p> + The vxworks configure has been updated to respect the + environment CFLAGS.</p> + <p> + Own Id: OTP-15773</p> + </item> + <item> + <p> + Fix configure to not enable PGO (profile guided + optimizations) when linking of the PGO binary fails. For + instance this happens when there is no gcov lib + installed.</p> + <p> + Own Id: OTP-15788</p> + </item> + <item> + <p> + Fix bug on OpenBSD where sockets using <c>active, + true</c> or <c>active, N</c> could cause the system to + live lock. The bug was introduced in erts-10.2 + (OTP-21.2).</p> + <p> + Own Id: OTP-15791</p> + </item> + </list> + </section> + + + <section><title>Improvements and New Features</title> + <list> + <item> + <p> + Add support for Erlang Distribution protocol to split the + payload of large signals into several fragments. This + allows other processes to communicate uninterrupted + during the transmission of these signals.</p> + <p> + Own Id: OTP-13397</p> + </item> + <item> + <p> + A simple socket API is provided through the socket + module. This is a low level API that does *not* replace + gen_[tcp|udp|sctp]. It is intended to *eventually* + replace the inet driver, but not the high level + gen-modules (gen_tcp, gen_udp and gen_sctp). It also + provides a basic API that facilitates the implementation + of other protocols, that is TCP, UDP and SCTP. </p> + <p> + Known issues are; No support for the Windows OS + (currently).</p> + <p> + Own Id: OTP-14831</p> + </item> + <item> + <p>Added NIF functions <seealso + marker="erl_nif#enif_set_pid_undefined"><c>enif_set_pid_undefined</c></seealso>, + <seealso + marker="erl_nif#enif_is_pid_undefined"><c>enif_is_pid_undefined</c></seealso> + and <seealso + marker="erl_nif#enif_compare_pids"><c>enif_compare_pids</c></seealso>.</p> + <p> + Own Id: OTP-15011 Aux Id: PR-2147 </p> + </item> + <item> + <p>Underutilized memory segments (carriers) can now move + between all allocator instances, rather than just between + instances of the same type, which greatly reduces memory + usage in some scenarios. </p> + <p> + Own Id: OTP-15063</p> + </item> + <item> + <p>The emulator will now mark free blocks in pooled + carriers with <c>madvise(2) + MADV_FREE</c> (or similar), + letting the OS reclaim the associated physical memory if + necessary.</p> + <p> + Own Id: OTP-15075</p> + </item> + <item> + <p> + New <c>ERL_NIF_SELECT_CANCEL</c> feature added to + <c>enif_select</c> in order to cancel (or "deselect") a + read or write event on a previously selected file + descriptor.</p> + <p> + Own Id: OTP-15095</p> + </item> + <item> + <p> + ETS option <c>write_concurrency</c> now also affects and + improves the scalability of <c>ordered_set</c> tables. + The implementation is based on a data structure called + contention adapting search tree, where the lock + granularity adapts to the actual amount of concurrency + exploited by the applications in runtime.</p> + <p> + Own Id: OTP-15128</p> + </item> + <item> + <p> + Build configuration of the <c>crypto</c> application has + been moved from the <c>erts</c> application into the + <c>crypto</c> application.</p> + <p> + Own Id: OTP-15129</p> + </item> + <item> + <p>Anonymous functions that don't capture environment are + now created at load-time instead of in run-time.</p> + <p> + Own Id: OTP-15195 Aux Id: PR-1812 </p> + </item> + <item> + <p> + Optimize updates of maps with identical keys and values. + E.g. in the example below the original Map will be reused + as the return of the update.</p> + <p> + 1> Map = #{ a => b }. #{ a => b } 2> Map#{ a := b }.</p> + <p> + Own Id: OTP-15211 Aux Id: PR-1889 </p> + </item> + <item> + <p> + Optimize <c>binary:match/2</c> and + <c>binary:matches/2</c> to use memchr internally.</p> + <p> + Own Id: OTP-15238 Aux Id: PR-1803 </p> + </item> + <item> + <p> + The runtime system used to terminate when a message + larger than 2 Gb was passed over the distribution. The + send operation will now instead throw a + <c>system_limit</c> exception.</p> + <p> + Own Id: OTP-15261</p> + </item> + <item> + <p> + Change the first module called by erts to be named + erl_init instead of otp_ring0. systools in sasl have been + updated to reflect this change.</p> + <p> + Own Id: OTP-15336 Aux Id: PR-1825 </p> + </item> + <item> + <p> + Minor adjustments made to build system for parallel + configure.</p> + <p> + Own Id: OTP-15340 Aux Id: OTP-14625 </p> + </item> + <item> + <p> + Two new NIF interface functions <c>enif_select_read</c> + and <c>enif_select_write</c>. They are similar to + existing <c>enif_select</c> but allow a custom event + message as an argument.</p> + <p> + Own Id: OTP-15349 Aux Id: PR-2084 </p> + </item> + <item> + <p>The embedded copy of <c>zlib</c> has been updated from + <c>1.2.8</c> to <c>1.2.11</c>.</p> + <p>Note that this copy is only used as a fallback when + the target platform doesn't provide any <c>zlib</c> + development libraries. If your system provides + <c>zlib</c> then it will be used even if it is older than + <c>1.2.11</c>.</p> + <p> + Own Id: OTP-15351 Aux Id: ERL-749 </p> + </item> + <item> + <p> + New NIF function <c>enif_make_monitor_term</c>.</p> + <p> + Own Id: OTP-15362 Aux Id: PR-2127 </p> + </item> + <item> + <p>Appending lists (The ++ operator) will now yield + properly on large inputs.</p> + <p> + Own Id: OTP-15427</p> + </item> + <item> + <p>The <c>length/1</c> BIF used to calculate the length + of the list in one go without yielding, even if the list + was very long. In OTP 22, <c>length/1</c> will yield when + called with long lists.</p> + <p> + Own Id: OTP-15439</p> + </item> + <item> + <p> + Processes sending messages are now punished with a + reduction cost based on message size. That is, a process + sending a large message will yield earlier than before.</p> + <p> + Own Id: OTP-15513 Aux Id: ERL-773 </p> + </item> + <item> + <p>The transitory emulator option <c>+ztma true</c> + (introduced in OTP 21.3) has been removed.</p> + <p> + Own Id: OTP-15581 Aux Id: OTP-15580 </p> + </item> + <item> + <p>In OTP 22, HiPE (the native code compiler) is not + fully functional. The reasons for this are:</p> + <p>There are new BEAM instructions for binary matching + that the HiPE native code compiler does not support.</p> + <p>The new optimizations in the Erlang compiler create + new combination of instructions that HiPE currently does + not handle correctly.</p> + <p>If erlc is invoked with the <c>+native</c> option, and + if any of the new binary matching instructions are used, + the compiler will issue a warning and produce a BEAM file + without native code.</p> + <p> + Own Id: OTP-15596</p> + </item> + <item> + <p> + The termination behaviour of processes has changed to + allow processes to yield while sending link exit/monitor + down signals.</p> + <p> + The erl crash dump has been expanded to now also include + processes that are termeinating but have not yet + terminated.</p> + <p> + Own Id: OTP-15610</p> + </item> + <item> + <p> + The dist messages EXIT, EXIT2 and MONITOR_DOWN have been + updated with new versions that send the reason term as + part of the payload of the message instead of as part of + the control message.</p> + <p> + The old versions are still present and can be used when + communicating with nodes that don't support the new + versions.</p> + <p> + Own Id: OTP-15611</p> + </item> + <item> + <p> + When sending messages, exit, exit2 and monitor down + distributed signals, the process sending will now yield + appropriately.</p> + <p> + This means that a terminating process will yield and + possibly be suspended on busy distribution entries while + they are terminating. This means that any memory held by + such processes will not be released until after all + exit/monitor down signals have been sent.</p> + <p> + Own Id: OTP-15612</p> + </item> + <item> + <p> + All external pids/ports/refs created by + erlang:list_to_pid/port/ref debug functions now compare + equal to any other pid/port/ref with the same number from + that node.</p> + <p> + Before this change they compared differently because the + node creation of the pid/port/ref did not compare equal + to any real pid/port/ref creation.</p> + <p> + This will mostly effect pids/ports/refs typed in the + shell.</p> + <p> + Own Id: OTP-15613</p> + </item> + <item> + <p> + The <c>persistent_term</c> functions <c>put/2</c> and + <c>erase/1</c> are now yielding.</p> + <p> + Own Id: OTP-15615</p> + </item> + <item> + <p> + A new <seealso + marker="erlang#dist_ctrl_set_opt/3"><c>erlang:dist_ctrl_set_opt(DHandle, + get_size, Value)</c></seealso> option has been added. + This option makes it possible to configure the + distribution channel identified by <c>DHandle</c> so that + <seealso + marker="erlang#dist_ctrl_get_data/1"><c>erlang:dist_ctrl_get_data(DHandle)</c></seealso> + also returns the size of the data to pass over the + channel.</p> + <p> + Own Id: OTP-15617</p> + </item> + <item> + <p>Previously, all ETS tables used centralized counter + variables to keep track of the number of items stored and + the amount of memory consumed. These counters can cause + scalability problems (especially on big NUMA systems). + This change adds an implementation of a decentralized + counter and modifies the implementation of ETS so that + ETS tables of type <c>ordered_set</c> with + <c>write_concurrency</c> enabled use the decentralized + counter. Experiments indicate that this change + substantially improves the scalability of ETS + <c>ordered_set</c> tables with <c>write_concurrency</c> + enabled in scenarios with frequent <c>ets:insert/2</c> + and <c>ets:delete/2</c> calls.</p> + <p> + Own Id: OTP-15623 Aux Id: PR-2190 </p> + </item> + <item> + <p>The <c>iolist_size/1</c> function is now yielding + which means that an Erlang/OTP system will be responsive + even if the applications running on the system frequently + call <c>iolist_size/1</c> with large iolists.</p> + <p> + Own Id: OTP-15631</p> + </item> + <item> + <p> + A simple test suite for the net module has been added.</p> + <p> + Own Id: OTP-15635</p> + </item> + <item> + <p>Added the NIF function <c>enif_term_type</c>, which + helps avoid long sequences of <c>enif_is_xyz</c> by + returning the type of the given term. This is especially + helpful for NIFs that serialize terms, such as JSON + encoders, where it can improve both performance and + readability.</p> + <p> + Own Id: OTP-15640</p> + </item> + <item> + <p>The last call optimization is now applied to BIFs. + When calling a BIF in the tail position of a function, + the return address and stack frame will now be discarded + before calling the BIF. As a consequence of this change, + the immediate caller of a tail-called BIF will no longer + be available in stack backtraces.</p> + <p> + Own Id: OTP-15674 Aux Id: PR-2177 </p> + </item> + <item> + <p> + Fix GC bug where distributed messages in a processes + mailbox would cause extra GCs. This can be very expensive + if there many messages in the mailbox.</p> + <p> + Own Id: OTP-15703</p> + </item> + <item> + <p>Internal documentation has now been added to the + <em>Erts</em> and <em>Compiler</em> applications.</p> + <p>The internal documents for <em>Erts</em> describe + miscellaneous interesting implementation details. Those + details can change at any time.</p> + <p>The internal documentation for <em>Compiler</em> + documents the API for the Core Erlang modules. While we + will not change those APIs without good reason, we don't + give the same guarantees about backward compatibility as + for the rest of the APIs in OTP.</p> + <p> + Own Id: OTP-15715</p> + </item> + <item> + <p>The performance of non-bignum integer arithmetic has + been improved.</p> + <p> + Own Id: OTP-15740</p> + </item> + <item> + <p> + The <c>-remsh</c> option to <c>erl</c> now automatically + adds the local systems hostname to the target node if no + nodename is given. e.g.</p> + <p> + <c> erl -name foo -remsh bar </c><br/> <c> erl -sname foo + -remsh bar </c></p> + <p> + Own Id: OTP-15794 Aux Id: PR-2219 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.3.5.4</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Fixed bug causing VM crash when doing textual dump of a + process containing an unhandled monitor down signal. + Textual process dumps can be done with + <c>erlang:system_info(procs)</c>, trace feature + <c>process_dump</c>, Erlang shell break menu and a + crashdump. Bug exist since OTP 21.0.</p> + <p> + Own Id: OTP-15909 Aux Id: ERL-979 </p> + </item> + <item> + <p><c>lists:subtract/2</c> would produce incorrect + results for some inputs on 64-bit platforms.</p> + <p> + Own Id: OTP-15938 Aux Id: ERL-986 </p> + </item> + <item> + <p>Fixed a bug in the loader that was similar to + <c>OTP-15938</c>, yielding incorrect code for some inputs + on 64-bit platforms.</p> + <p> + Own Id: OTP-15939</p> + </item> + <item> + <p> + Fixed bug causing scheduler threads in rare cases to + block spinnning indefinitely. Bug exists since OTP 21.0.</p> + <p> + Own Id: OTP-15941 Aux Id: PR-2313 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.3.5.3</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + If you set <c>{linger,{true,0}}</c> on a <c>gen_tcp</c> + listen socket, accept a connection on that socket, and + then close the accepted socket, now the linger zero + setting is transferred to the accepted socket. Before + this correction that information was lost and the close + behaviour on the accepted socket incorrect.</p> + <p> + Own Id: OTP-15370 Aux Id: ERIERL-353 </p> + </item> + <item> + <p> + Fixed <c>process_info(Pid,reductions)</c> to not + categorically increase reduction count of the measured + process <c>Pid</c>. Repeated reduction measure of an idle + process will most often (but not guaranteed) return the + same value, like it behaved before OTP 21.3.8.</p> + <p> + Own Id: OTP-15865 Aux Id: ERL-964 </p> + </item> + <item> + <p> + The runtime system disconnected a connection if it + received an <c>exit/2</c> signal where the recipient was + a process on an old incarnation of the current node. That + is, the receiving node had the same node name, but + another "creation" number. The signal will now just be + dropped since the receiving process no longer exists.</p> + <p> + Own Id: OTP-15867 Aux Id: ERIERL-373 </p> + </item> + </list> + </section> + + + <section><title>Improvements and New Features</title> + <list> + <item> + <p> + The possibility to send ancillary data, in particular the + TOS field, has been added to <c>gen_udp:send/4,5</c>.</p> + <p> + Own Id: OTP-15747 Aux Id: ERIERL-294 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.3.5.2</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p>In nested use of <c>try</c>/<c>catch</c>, rethrowing + an exception using <c>erlang:raise/3</c> with a different + class would not always be able to change the class of the + exception.</p> + <p> + Own Id: OTP-15834 Aux Id: ERIERL-367 </p> + </item> + <item> + <p> + Fixed bug in <c>seq_trace:set_token(label,Term)</c> which + could cause VM crash if <c>Term</c> was heap allocated + (not an atom, small integer, local pid or port). Bug + exists since OTP 21.0 when terms other than small + integers were first allowed as labels.</p> + <p> + Own Id: OTP-15849 Aux Id: ERL-700 </p> + </item> + <item> + <p> + Fix <c>seq_trace:print/2</c> not to raise <c>badarg</c> + exception if label is not a small integer. Bug exists + since OTP 21.0.</p> + <p> + Own Id: OTP-15859 Aux Id: ERL-700 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 10.3.5.1</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p>Fixed a buffer overflow when + <c>binary_to_existing_atom/2</c> and + <c>list_to_existing_atom/2</c> was used with the + <c>latin1</c> encoding.</p> + <p> + Own Id: OTP-15819 Aux Id: ERL-944 </p> + </item> + </list> + </section> + +</section> + <section><title>Erts 10.3.5</title> <section><title>Fixed Bugs and Malfunctions</title> @@ -2040,6 +2795,79 @@ </section> +<section><title>Erts 9.3.3.11</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p>Fixed a buffer overflow when + <c>binary_to_existing_atom/2</c> and + <c>list_to_existing_atom/2</c> was used with the + <c>latin1</c> encoding.</p> + <p> + Own Id: OTP-15819 Aux Id: ERL-944 </p> + </item> + </list> + </section> + +</section> + +<section><title>Erts 9.3.3.10</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p>Fixes of install/release phase in build system.</p> + <list> <item>The source tree was modified when + installing/releasing and/or applying a patch.</item> + <item>Some files were installed with wrong access + rights.</item> <item>If applying a patch (using + <c>otp_patch_apply</c>) as another user (except root) + than the user that built the source, the documentation + was not properly updated.</item> </list> + <p> + Own Id: OTP-15551</p> + </item> + <item> + <p> + Minor fixes for <c>make clean</c>.</p> + <p> + Own Id: OTP-15657</p> + </item> + <item> + <p> + Fixed a bug in all <c>ets:select*</c> and + <c>ets:match*</c> functions that could in some rare cases + lead to very poor performance.</p> + <p> + Own Id: OTP-15660 Aux Id: ERL-869 </p> + </item> + <item> + <p> + Fix a possible deadlock when terminating the ERTS caused + by a dirty scheduler not releasing it's run-queue lock + when terminating.</p> + <p> + Own Id: OTP-15690 Aux Id: PR-2172 </p> + </item> + <item> + <p>Add missing documentation of new external tags + <c>NEW_PID</c>, <c>NEW_PORT</c> and + <c>NEWER_REFERENCE</c> introduced in OTP 19.</p> <p>These + new tags are planned to be "activated" in OTP 23 when + distribution capability flag <c>DFLAG_BIG_CREATION</c> + becomes mandatory. Older nodes (>= 19) are able to decode + these new tags and send them back to the new node. Nodes + older than OTP 23 will however never encode their own + local pids, ports and references using the new tags.</p> + <p> + Own Id: OTP-15766</p> + </item> + </list> + </section> + +</section> + <section><title>Erts 9.3.3.9</title> <section><title>Improvements and New Features</title> @@ -8421,8 +9249,7 @@ Erlang/OTP has been ported to the realtime operating system OSE. The port supports both smp and non-smp emulator. For details around the port and how to started - see the User's Guide in the <seealso - marker="ose:ose_intro">ose</seealso> application. </p> + see the User's Guide in the <em>ose</em> application.</p> <p> Note that not all parts of Erlang/OTP has been ported. </p> <p> @@ -9528,9 +10355,9 @@ <c>fix_alloc</c> allocator, a different strategy for management of fix blocks will be used.</item> <item>The information returned from <seealso - marker="erlang:system_info_allocator_tuple"><c>erlang:system_info({allocator, + marker="erlang#system_info_allocator_tuple"><c>erlang:system_info({allocator, A})</c></seealso>, and <seealso - marker="erlang:system_info_allocator_sizes"><c>erlang:system_info({allocator_sizes, + marker="erlang#system_info_allocator_sizes"><c>erlang:system_info({allocator_sizes, A})</c></seealso> will be slightly different when this feature has been enabled. An <c>mbcs_pool</c> tuple will be present giving information about abandoned carriers, @@ -10339,8 +11166,7 @@ information about signal ordering guarantees, see the chapter on <seealso marker="erts:communication">communication</seealso> in - the ERTS user's guide. The <seealso - marker="erts:erl#+n">+n</seealso> command line flag of + the ERTS user's guide. The <c>+n</c> command line flag of <seealso marker="erts:erl">erl(1)</seealso> can be helpful when trying to find signaling order bugs in Erlang code that have been exposed by these @@ -11319,7 +12145,7 @@ you use erlang:halt/2 with an integer first argument and an option list containing {flush,false} as the second argument. Note that now is flushing not dependant of the - exit code, and you can not only flush async threads + exit code, and you cannot only flush async threads operations which we deemed as a strange behaviour anyway. </p> <p>Also, erlang:halt/1,2 has gotten a new feature: If the |