trxcon: use non-blocking stderr logging by default

The logging in trxcon is initialized by calling osmo_init_logging2(),
which creates an stderr target in *blocking* mode.  Blocking write()s
may cause random burst scheduling delays (due to the whole process
being stuck).  This is not desired and becomes even more critical
when operating in PS doman, which imposes strict timing requirements.

trxcon does not have its own VTY interface yet, so there's currently
no easy way to switch to non-blocking mode like in other osmo-apps.
Let's enable it by default in trxcon_logging_init().

Change-Id: I8cbfd9b4644f8442cbedc7e452ba79816923fc10
Related: OS#5500
---
M src/host/trxcon/src/logging.c
1 file changed, 21 insertions(+), 0 deletions(-)

diff --git a/src/host/trxcon/src/logging.c b/src/host/trxcon/src/logging.c
index b80f00d..e873045 100644
--- a/src/host/trxcon/src/logging.c
+++ b/src/host/trxcon/src/logging.c
@@ -92,6 +92,7 @@
 int trxcon_logging_init(void *tall_ctx, const char *category_mask)
 {
 	osmo_init_logging2(tall_ctx, &trxcon_log_info);
+	log_target_file_switch_to_wqueue(osmo_stderr_target);
 
 	if (category_mask)
 		log_parse_category_mask(osmo_stderr_target, category_mask);

