dnsdist: Limit the number of concurrent build jobs to 4 on CI

We are experiencing a lot of build failures on GH actions when
building with `meson` and `ASAN+UBSAN`, likely running out of
memory. We could try to be smarter and only reduce the concurrency
when building with `ASAN+UBSAN`, but for now let's see if it makes
the failures go away.

diff --git a/tasks.py b/tasks.py
index ab8a94895222a45d05646a09a8112c1beeae280f..47a6fa5b5fe255e88ba95a2b9fe42ce8707f7798 100644 (file)
--- a/tasks.py
+++ b/tasks.py
@@ -869,7 +869,7 @@ def ci_dnsdist_make(c):
     c.run(f'make -j{get_build_concurrency(4)} -k V=1')
 
 def ci_dnsdist_run_ninja(c):
-    c.run(f'. {repo_home}/.venv/bin/activate && ninja -j{get_build_concurrency()} --verbose')
+    c.run(f'. {repo_home}/.venv/bin/activate && ninja -j{get_build_concurrency(4)} --verbose')
 
 @task
 def ci_dnsdist_make_bear(c, builder):