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This has been done because a slow client attack is possible if the
async thread pool is used. The scenario is:
Client does a request for a file and then slowly receives the file one
byte at a time. This will eventually fill the async thread pool with blocking
sendfile operations and thus starving the vm of all file operations.
If you still want to use the async threads pool for sendfile an option to
enable it has been introduced.
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Update versions of OTP, erts, kernel, and stdlib to comply with
the new version scheme decided by the OTP technical board.
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* rickard/garbage_collect/OTP-11388:
Parallel check_process_code when code_server purge a module
Functionality for disabling garbage collection
Use asynchronous check_process_code in code_parallel_SUITE
Execution of system tasks in context of another process
Conflicts:
bootstrap/lib/kernel/ebin/hipe_unified_loader.beam
erts/preloaded/ebin/erlang.beam
erts/preloaded/ebin/erts_internal.beam
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* sv/file-osync/OTP-11498:
Add sync option to file:open/2
Conflicts:
erts/preloaded/ebin/prim_file.beam
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Conflicts:
erts/preloaded/ebin/prim_inet.beam
lib/kernel/test/gen_sctp_SUITE.erl
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When the code_server is about to purge a module it will now issue
asynchronous check_process_code requests to all processes at once
instead of one at a time. These check_process_code operation can
execute in parallel.
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Conflicts:
bootstrap/lib/kernel/ebin/os.beam
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The sync option adds the POSIX O_SYNC flag to the open system call on
platforms that support the flag or its equivalent, e.g.,
FILE_FLAG_WRITE_THROUGH on Windows. For platforms that don't support it,
file:open/2 returns {error, enotsup} if the sync option is passed in.
The semantics of O_SYNC are platform-specific. For example, not all
platforms guarantee that all file metadata are written to the disk along
with the file data when the flag is in effect. This issue is noted in the
documentation this commit adds for the sync option.
Add a test for the sync option. Note however that the underlying OS
semantics for O_SYNC can't be tested automatically in any practical way, so
the test assumes the OS does the right thing with the flag when
present. For manual verification, dtruss on OS X and strace on Linux were
both run against beam processes to watch calls to open(), and file:open/2
was called in Erlang shells to open files for writing, both with and
without the sync option. Both the dtruss output and the strace output
showed that the O_SYNC flag was present in the open() calls when sync was
specified and was clear when sync was not specified.
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New BIF os:unsetenv/1 which deletes an environment variable and
returns 'true'.
Does not change any old functionality.
Calls the libc function unsetenv(3) on UNIX and
SetEnvironmentVariableW(key, NULL) on Windows. The unicode support
is the same as for os:getenv and os:putenv.
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* ates/sctp_errors_fix/OTP-11379:
Update primary bootstrap
Add more SCTP errors as described in RFC 4960
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Add the {active,N} socket option, where N is an integer in the range
-32768..32767, to allow a caller to specify the number of data messages to
be delivered to the controlling process. Once the socket's delivered
message count either reaches 0 or is explicitly set to 0 with
inet:setopts/2 or by including {active,0} as an option when the socket is
created, the socket transitions to passive ({active, false}) mode and the
socket's controlling process receives a message to inform it of the
transition. TCP sockets receive {tcp_passive,Socket}, UDP sockets receive
{udp_passive,Socket} and SCTP sockets receive {sctp_passive,Socket}.
The socket's delivered message counter defaults to 0, but it can be set
using {active,N} via any gen_tcp, gen_udp, or gen_sctp function that takes
socket options as arguments, or via inet:setopts/2. New N values are added
to the socket's current counter value, and negative numbers can be used to
reduce the counter value. Specifying a number that would cause the socket's
counter value to go above 32767 causes an einval error. If a negative
number is specified such that the counter value would become negative, the
socket's counter value is set to 0 and the socket transitions to passive
mode. If the counter value is already 0 and inet:setopts(Socket,
[{active,0}]) is specified, the counter value remains at 0 but the
appropriate passive mode transition message is generated for the socket.
This commit contains a modified preloaded prim_inet.beam due to changes in
prim_inet.erl.
Add tests for {active,N} mode for TCP, UDP, and SCTP sockets.
Add documentation for {active,N} mode for inet, gen_tcp, gen_udp, and
gen_sctp.
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Conflicts:
bootstrap/lib/kernel/ebin/hipe_unified_loader.beam
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* ks/hipe_unified_loader-cleanup/OTP-11301:
Updated primary bootstrap
Cleanup of the file
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Conflicts:
erts/preloaded/ebin/prim_inet.beam
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* raimo/linux-network-namespace-sockopt/OTP-11157:
Document socket option 'netns'
Rudimentary test
Make netns option value a string
Implement netns for SCTP + bugfixes
Implement netns option for TCP and UDP
Implement emulator netns support for TCP and UDP
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Consisting of three items:
- Eliminate uses of is_subtype/2 in specs
- Change module-local void functions to return 'ok' instead of []
- Make sure there are no dialyzer warnings with --Wunmatched_returns
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* fh/start-all/OTP-11250:
kernel: fix documentation regarding ensure_all_started endtag
Updated primary bootstrap
Add application:ensure_all_started/1-2
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* fredrik/inet/clarify_doc_address/OTP-10676:
kernel: fixed specs to inet:ntoa/1
kernel: changed tests where inet_parse:ntoa/1 was used to inet:parse/1
kernel: added ntoa documentation and exported it in inet.erl
kernel: clarified inet:parse_address/1 referrering to old code
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This adds two new functions to the application module that will
recursively look for missing dependencies to start the entire dependency
chain of a given application, and then the application itself, if
possible.
Its entire behavior is based on the currently existing 'start/1-2'
functions, which will report dependencies that have not yet been started
and other problems encountered. 'ensure_all_started/1-2' will use this
information the way any programmer would manually do it to automate the
process.
This kind of functionality, while not OTP-ish (releases do this start
sequence for the user), is still useful for testing purposes, quick
demonstrations, and programmers who do not wish or know how to use OTP
releases.
The function returns '{ok, StartedApps}' for all started or already
started applications (already started are omitted from the list), and
will return '{error, {AppName, Reason}}' on a failure to allow users to
rapidly know why the function failed.
Note that no specific check is made for direct or indirect circular
dependencies between applications, and these will make the function go
in an infinite loop.
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Conflicts:
lib/kernel/src/inet_db.erl
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* raimo/inet-gethostbyname-lowercase-search/OTP-10689:
Add test cases for host lookup case (in)sensitivity
Improve case (in)sensitivity for host lookups
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* siri/kernel/heart-set_cmd-unicode/OTP-10843:
Convert command string to encoded binary in heart:set_cmd/1
Conflicts:
lib/kernel/src/heart.erl
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Allow unicode strings in os:cmd and try to convert the
result bytes to unicode list.
Also test it.
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* avi/fix-os-cmd-win/OTP-11104:
Add testcase to exported
Added primary bootstrap for os.beam
kernel: redefined deep_list_command test
Remove unnecessary whitespaces in os.erl and os_SUITE.erl
Fix deep list argument error under Windows in os:cmd/1
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* maint:
Only verify not busy for erlang:send(Port, Msg, [nosuspend]) until scheduled
Make high_msgq_watermark and low_msgq_watermark generic inet options
Do not treat port_set_data/port_get_data as signals
Add 'frmptr' emulator type
Conflicts:
erts/preloaded/ebin/erlang.beam
erts/preloaded/ebin/erts_internal.beam
erts/preloaded/ebin/prim_inet.beam
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* rickard/inet_opts/OTP-11075:
Make high_msgq_watermark and low_msgq_watermark generic inet options
Conflicts:
erts/preloaded/ebin/prim_inet.beam
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