Report time spent in posix_fallocate() as a wait event.
When allocating DSM segments with posix_fallocate() on Linux (see commit
899bd785), report this activity as a wait event exactly as we would if
we were using file-backed DSM rather than shm_open()-backed DSM.
Author: Thomas Munro
Discussion:
@@ -371,10 +371,12 @@ dsm_impl_posix_resize(int fd, off_t size)
* interrupt pending. This avoids the possibility of looping forever
* if another backend is repeatedly trying to interrupt us.
*/
+ pgstat_report_wait_start(WAIT_EVENT_DSM_FILL_ZERO_WRITE);
do
{
rc = posix_fallocate(fd, 0, size);
} while (rc == EINTR && !(ProcDiePending || QueryCancelPending));
+ pgstat_report_wait_end();
/*
* The caller expects errno to be set, but posix_fallocate() doesn't
