From fa4ba923bd539647ace9d70d226a848bd6a89dac Mon Sep 17 00:00:00 2001 From: Amos Kong Date: Wed, 22 May 2013 12:57:35 +0800 Subject: [PATCH] kvm: add detail error message when fail to add ioeventfd I try to hotplug 28 * 8 multiple-function devices to guest with old host kernel, ioeventfds in host kernel will be exhausted, then qemu fails to allocate ioeventfds for blk/nic devices. It's better to add detail error here. Signed-off-by: Amos Kong Reviewed-by: Stefan Hajnoczi Signed-off-by: Gleb Natapov --- kvm-all.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/kvm-all.c b/kvm-all.c index c757dd2..12042f7 100644 --- a/kvm-all.c +++ b/kvm-all.c @@ -837,6 +837,8 @@ static void kvm_mem_ioeventfd_add(MemoryListener *listener, data, true, int128_get64(section->size), match_data); if (r < 0) { + fprintf(stderr, "%s: error adding ioeventfd: %s\n", + __func__, strerror(-r)); abort(); } } @@ -869,6 +871,8 @@ static void kvm_io_ioeventfd_add(MemoryListener *listener, data, true, int128_get64(section->size), match_data); if (r < 0) { + fprintf(stderr, "%s: error adding ioeventfd: %s\n", + __func__, strerror(-r)); abort(); } } -- 2.7.4