From: Andres Freund Date: Tue, 6 Jun 2017 01:53:41 +0000 (-0700) Subject: Have walsenders participate in procsignal infrastructure. X-Git-Tag: REL9_6_4~94 X-Git-Url: http://git.postgresql.org/gitweb/?a=commitdiff_plain;h=b3d5b6833f460debde53a122709c3deb07056561;p=postgresql.git Have walsenders participate in procsignal infrastructure. The non-participation in procsignal was a problem for both changes in master, e.g. parallelism not working for normal statements run in walsender backends, and older branches, e.g. recovery conflicts and catchup interrupts not working for logical decoding walsenders. This commit thus replaces the previous WalSndXLogSendHandler with procsignal_sigusr1_handler. In branches since db0f6cad48 that can lead to additional SetLatch calls, but that only rarely seems to make a difference. Author: Andres Freund Reviewed-By: Michael Paquier Discussion: https://postgr.es/m/20170421014030.fdzvvvbrz4nckrow@alap3.anarazel.de Backpatch: 9.4, earlier commits don't seem to benefit sufficiently --- diff --git a/src/backend/replication/walsender.c b/src/backend/replication/walsender.c index 834bf947a37..b7acedc0c61 100644 --- a/src/backend/replication/walsender.c +++ b/src/backend/replication/walsender.c @@ -186,7 +186,6 @@ static XLogRecPtr logical_startptr = InvalidXLogRecPtr; /* Signal handlers */ static void WalSndSigHupHandler(SIGNAL_ARGS); -static void WalSndXLogSendHandler(SIGNAL_ARGS); static void WalSndLastCycleHandler(SIGNAL_ARGS); /* Prototypes for private functions */ @@ -2577,17 +2576,6 @@ WalSndSigHupHandler(SIGNAL_ARGS) errno = save_errno; } -/* SIGUSR1: set flag to send WAL records */ -static void -WalSndXLogSendHandler(SIGNAL_ARGS) -{ - int save_errno = errno; - - latch_sigusr1_handler(); - - errno = save_errno; -} - /* SIGUSR2: set flag to do a last cycle and shut down afterwards */ static void WalSndLastCycleHandler(SIGNAL_ARGS) @@ -2621,7 +2609,7 @@ WalSndSignals(void) pqsignal(SIGQUIT, quickdie); /* hard crash time */ InitializeTimeouts(); /* establishes SIGALRM handler */ pqsignal(SIGPIPE, SIG_IGN); - pqsignal(SIGUSR1, WalSndXLogSendHandler); /* request WAL sending */ + pqsignal(SIGUSR1, procsignal_sigusr1_handler); pqsignal(SIGUSR2, WalSndLastCycleHandler); /* request a last cycle and * shutdown */