diff options
| -rw-r--r-- | sys/sparc64/sparc64/mp_machdep.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/sys/sparc64/sparc64/mp_machdep.c b/sys/sparc64/sparc64/mp_machdep.c index cb13663..5cd52a2 100644 --- a/sys/sparc64/sparc64/mp_machdep.c +++ b/sys/sparc64/sparc64/mp_machdep.c @@ -456,6 +456,12 @@ cpu_ipi_send(u_int mid, u_long d0, u_long d1, u_long d2) intr_restore(s); if ((ids & IDR_NACK) == 0) return; + /* + * Leave interrupts enabled for a bit before retrying + * in order to avoid deadlocks if the other CPU is also + * trying to send an IPI. + */ + DELAY(2); } if ( #ifdef KDB |
