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Diffstat (limited to 'erts')
| -rw-r--r-- | erts/doc/src/notes.xml | 329 |
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diff --git a/erts/doc/src/notes.xml b/erts/doc/src/notes.xml index 0363f0237e..7fc61517a8 100644 --- a/erts/doc/src/notes.xml +++ b/erts/doc/src/notes.xml @@ -30,6 +30,335 @@ </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> |