diff options
Diffstat (limited to 'lib/kernel')
| -rw-r--r-- | lib/kernel/doc/src/inet.xml | 33 | ||||
| -rw-r--r-- | lib/kernel/test/init_SUITE.erl | 23 |
2 files changed, 44 insertions, 12 deletions
diff --git a/lib/kernel/doc/src/inet.xml b/lib/kernel/doc/src/inet.xml index 104c698591..709ba8e8fd 100644 --- a/lib/kernel/doc/src/inet.xml +++ b/lib/kernel/doc/src/inet.xml @@ -1007,13 +1007,34 @@ get_tcpi_sacked(Sock) -> <marker id="option-linger"></marker> </item> <tag><c>{linger, {true|false, Seconds}}</c></tag> - <item> + <item> <p>Determines the time-out, in seconds, for flushing unsent data - in the <c>close/1</c> socket call. If the first component of - the value tuple is <c>false</c>, the second is ignored. This - means that <c>close/1</c> returns immediately, not waiting - for data to be flushed. Otherwise, the second component is - the flushing time-out, in seconds.</p> + in the <c>close/1</c> socket call. </p> + <p>The first component is if linger is enabled, the second component + is the flushing time-out, in seconds. There are 3 alternatives:</p> + <taglist> + <tag><c>{false, _}</c></tag> + <item> + <p>close/1 or shutdown/2 returns immediately, + not waiting for data to be flushed, with closing + happening in the background.</p> + </item> + <tag><c>{true, 0}</c></tag> + <item> + <p>Aborts the connection when it is closed. + Discards any data still remaining in the send buffers + and sends RST to the peer.</p> + <p>This avoids TCP's TIME_WAIT state, but leaves open + the possibility that another "incarnation" of this connection + being created.</p> + </item> + <tag><c>{true, Time} when Time > 0</c></tag> + <item> + <p>close/1 or shutdown/2 will not return until + all queued messages for the socket have been successfully + sent or the linger timeout (Time) has been reached.</p> + </item> + </taglist> </item> <tag><c>{low_msgq_watermark, Size}</c></tag> <item> diff --git a/lib/kernel/test/init_SUITE.erl b/lib/kernel/test/init_SUITE.erl index 7828cc4716..a0154b2694 100644 --- a/lib/kernel/test/init_SUITE.erl +++ b/lib/kernel/test/init_SUITE.erl @@ -295,7 +295,7 @@ is_real_system(KernelVsn, StdlibVsn) -> %% before restart. %% ------------------------------------------------ many_restarts() -> - [{timetrap,{minutes,8}}]. + [{timetrap,{minutes,16}}]. many_restarts(Config) when is_list(Config) -> {ok, Node} = loose_node:start(init_test, "", ?DEFAULT_TIMEOUT_SEC), @@ -315,7 +315,7 @@ loop_restart(N,Node,EHPid) -> loose_node:stop(Node), ct:fail(not_stopping) end, - ok = wait_for(30, Node, EHPid), + ok = wait_for(60, Node, EHPid), loop_restart(N-1,Node,rpc:call(Node,erlang,whereis,[logger])). wait_for(0,Node,_) -> @@ -367,7 +367,8 @@ restart(Config) when is_list(Config) -> SysProcs0 = rpc:call(Node, ?MODULE, find_system_processes, []), io:format("SysProcs0=~p~n", [SysProcs0]), [InitPid, PurgerPid, LitCollectorPid, - DirtySigNPid, DirtySigHPid, DirtySigMPid] = SysProcs0, + DirtySigNPid, DirtySigHPid, DirtySigMPid, + PrimFilePid] = SysProcs0, InitPid = rpc:call(Node, erlang, whereis, [init]), PurgerPid = rpc:call(Node, erlang, whereis, [erts_code_purger]), Procs = rpc:call(Node, erlang, processes, []), @@ -385,7 +386,8 @@ restart(Config) when is_list(Config) -> SysProcs1 = rpc:call(Node, ?MODULE, find_system_processes, []), io:format("SysProcs1=~p~n", [SysProcs1]), [InitPid1, PurgerPid1, LitCollectorPid1, - DirtySigNPid1, DirtySigHPid1, DirtySigMPid1] = SysProcs1, + DirtySigNPid1, DirtySigHPid1, DirtySigMPid1, + PrimFilePid1] = SysProcs1, %% Still the same init process! InitPid1 = rpc:call(Node, erlang, whereis, [init]), @@ -411,6 +413,10 @@ restart(Config) when is_list(Config) -> DirtySigMP = pid_to_list(DirtySigMPid), DirtySigMP = pid_to_list(DirtySigMPid1), + %% and same prim_file helper process! + PrimFileP = pid_to_list(PrimFilePid), + PrimFileP = pid_to_list(PrimFilePid1), + NewProcs0 = rpc:call(Node, erlang, processes, []), NewProcs = NewProcs0 -- SysProcs1, case check_processes(NewProcs, MaxPid) of @@ -437,7 +443,8 @@ restart(Config) when is_list(Config) -> literal_collector, dirty_sig_handler_normal, dirty_sig_handler_high, - dirty_sig_handler_max}). + dirty_sig_handler_max, + prim_file}). find_system_processes() -> find_system_procs(processes(), #sys_procs{}). @@ -448,7 +455,8 @@ find_system_procs([], SysProcs) -> SysProcs#sys_procs.literal_collector, SysProcs#sys_procs.dirty_sig_handler_normal, SysProcs#sys_procs.dirty_sig_handler_high, - SysProcs#sys_procs.dirty_sig_handler_max]; + SysProcs#sys_procs.dirty_sig_handler_max, + SysProcs#sys_procs.prim_file]; find_system_procs([P|Ps], SysProcs) -> case process_info(P, [initial_call, priority]) of [{initial_call,{erl_init,start,2}},_] -> @@ -472,6 +480,9 @@ find_system_procs([P|Ps], SysProcs) -> {priority,max}] -> undefined = SysProcs#sys_procs.dirty_sig_handler_max, find_system_procs(Ps, SysProcs#sys_procs{dirty_sig_handler_max = P}); + [{initial_call,{prim_file,start,0}},_] -> + undefined = SysProcs#sys_procs.prim_file, + find_system_procs(Ps, SysProcs#sys_procs{prim_file = P}); _ -> find_system_procs(Ps, SysProcs) end. |