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authorAmos Kong <akong@redhat.com>2013-05-25 06:44:15 +0800
committerGleb Natapov <gleb@redhat.com>2013-06-04 11:49:38 +0300
commit6ea34c9b78c10289846db0abeebd6b84d5aca084 (patch)
tree23b7139d16f9bf7c0a5ccd306c39d1b66570b61c /include/linux/kvm_host.h
parent566af9404bf57267ea4fc29ca6b4628a17ee3ea7 (diff)
kvm: exclude ioeventfd from counting kvm_io_range limit
We can easily reach the 1000 limit by start VM with a couple hundred I/O devices (multifunction=on). The hardcode limit already been adjusted 3 times (6 ~ 200 ~ 300 ~ 1000). In userspace, we already have maximum file descriptor to limit ioeventfd count. But kvm_io_bus devices also are used for pit, pic, ioapic, coalesced_mmio. They couldn't be limited by maximum file descriptor. Currently only ioeventfds take too much kvm_io_bus devices, so just exclude it from counting kvm_io_range limit. Also fixed one indent issue in kvm_host.h Signed-off-by: Amos Kong <akong@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Gleb Natapov <gleb@redhat.com>
Diffstat (limited to 'include/linux/kvm_host.h')
-rw-r--r--include/linux/kvm_host.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index d9a3c30eab2e..e3aae6db276f 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -145,7 +145,8 @@ struct kvm_io_range {
#define NR_IOBUS_DEVS 1000
struct kvm_io_bus {
- int dev_count;
+ int dev_count;
+ int ioeventfd_count;
struct kvm_io_range range[];
};