[dpdk-dev] [PATCH v2 2/2] vhost: unmap log memory on cleanup.
Ilya Maximets
i.maximets at samsung.com
Thu Jun 16 11:16:37 CEST 2016
Fixes memory leak on QEMU migration.
Fixes: 54f9e32305d4 ("vhost: handle dirty pages logging request")
Signed-off-by: Ilya Maximets <i.maximets at samsung.com>
---
lib/librte_vhost/vhost-net.h | 1 +
lib/librte_vhost/vhost_user/virtio-net-user.c | 15 +++++++++++++--
2 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/lib/librte_vhost/vhost-net.h b/lib/librte_vhost/vhost-net.h
index ec8f964..38593a2 100644
--- a/lib/librte_vhost/vhost-net.h
+++ b/lib/librte_vhost/vhost-net.h
@@ -134,6 +134,7 @@ struct virtio_net {
char ifname[IF_NAME_SZ];
uint64_t log_size;
uint64_t log_base;
+ uint64_t log_addr;
struct ether_addr mac;
} __rte_cache_aligned;
diff --git a/lib/librte_vhost/vhost_user/virtio-net-user.c b/lib/librte_vhost/vhost_user/virtio-net-user.c
index e6a2aed..a867a43 100644
--- a/lib/librte_vhost/vhost_user/virtio-net-user.c
+++ b/lib/librte_vhost/vhost_user/virtio-net-user.c
@@ -95,6 +95,10 @@ vhost_backend_cleanup(struct virtio_net *dev)
free(dev->mem);
dev->mem = NULL;
}
+ if (dev->log_addr) {
+ munmap((void *)(uintptr_t)dev->log_addr, dev->log_size);
+ dev->log_addr = 0;
+ }
}
int
@@ -407,8 +411,15 @@ user_set_log_base(int vid, struct VhostUserMsg *msg)
return -1;
}
- /* TODO: unmap on stop */
- dev->log_base = (uint64_t)(uintptr_t)addr + off;
+ /*
+ * Free previously mapped log memory on occasionally
+ * multiple VHOST_USER_SET_LOG_BASE.
+ */
+ if (dev->log_addr) {
+ munmap((void *)(uintptr_t)dev->log_addr, dev->log_size);
+ }
+ dev->log_addr = (uint64_t)(uintptr_t)addr;
+ dev->log_base = dev->log_addr + off;
dev->log_size = size;
return 0;
--
2.7.4
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