From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:51662) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Uf16w-0005sB-SG for qemu-devel@nongnu.org; Wed, 22 May 2013 00:57:15 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Uf16w-0005Gb-1o for qemu-devel@nongnu.org; Wed, 22 May 2013 00:57:14 -0400 Received: from mx1.redhat.com ([209.132.183.28]:28636) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Uf16v-0005GS-QN for qemu-devel@nongnu.org; Wed, 22 May 2013 00:57:13 -0400 From: Amos Kong Date: Wed, 22 May 2013 12:57:35 +0800 Message-Id: <1369198655-25156-1-git-send-email-akong@redhat.com> Subject: [Qemu-devel] [PATCH] kvm: add detail error message when fail to add ioeventfd List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: gleb@redhat.com Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org 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 --- kvm-all.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/kvm-all.c b/kvm-all.c index 8222729..3d5f7b7 100644 --- a/kvm-all.c +++ b/kvm-all.c @@ -813,6 +813,8 @@ static void kvm_mem_ioeventfd_add(MemoryListener *listener, r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space, data, true, section->size, match_data); if (r < 0) { + fprintf(stderr, "%s: error adding ioeventfd: %s\n", + __func__, strerror(-r)); abort(); } } @@ -843,6 +845,8 @@ static void kvm_io_ioeventfd_add(MemoryListener *listener, r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space, data, true, section->size, match_data); if (r < 0) { + fprintf(stderr, "%s: error adding ioeventfd: %s\n", + __func__, strerror(-r)); abort(); } } -- 1.7.1