diff mbox

[v8,08/27] vhost: document log resizing

Message ID 1444403861-3240-9-git-send-email-marcandre.lureau@redhat.com
State New
Headers show

Commit Message

Marc-André Lureau Oct. 9, 2015, 3:17 p.m. UTC 
From: Marc-André Lureau <marcandre.lureau@redhat.com>

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
 hw/virtio/vhost.c | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
index c0ed5b2..67e09fe 100644
--- a/hw/virtio/vhost.c
+++ b/hw/virtio/vhost.c
@@ -334,6 +334,8 @@  static inline void vhost_dev_log_resize(struct vhost_dev* dev, uint64_t size)
     uint64_t log_base = (uintptr_t)log->log;
     int r;
 
+    /* inform backend of log switching, this must be done before
+       releasing the current log, to ensure no logging is lost */
     r = dev->vhost_ops->vhost_call(dev, VHOST_SET_LOG_BASE, &log_base);
     assert(r >= 0);
     vhost_log_put(dev, true);