This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed- xenial' to 'verification-done-xenial'. If the problem still exists, change the tag 'verification-needed-xenial' to 'verification-failed- xenial'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: verification-needed-xenial -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1632786 Title: [Hyper-V] do not lose pending heartbeat vmbus packets Status in linux package in Ubuntu: Fix Committed Status in linux source package in Precise: Fix Committed Status in linux source package in Trusty: Fix Committed Status in linux source package in Vivid: Fix Committed Status in linux source package in Xenial: Fix Committed Status in linux source package in Yakkety: Fix Committed Bug description: Hyper-V hosts can continue sending heartbeat packets to guests independent of whether earlier packets have responses, which led to a potential issue of these packets being dropped when responses took too long to process. Lost heartbeats will lead to the host diagnosing that the guest is dead and should be shut down and restarted. The following patch was submitted upstream but has not yet been accepted. I will add the upstream commit ID once the patch goes into linux-next: From: Long Li <lon...@microsoft.com> The host keeps sending heartbeat packets independent of the guest responding to them. Even though we respond to the heartbeat messages at interrupt level, we can have situations where there maybe multiple heartbeat messages pending that have not been responded to. For instance this occurs when the VM is paused and the host continues to send the heartbeat messages. Address this issue by draining and responding to all the heartbeat messages that maybe pending. Signed-off-by: Long Li <lon...@microsoft.com> Signed-off-by: K. Y. Srinivasan <k...@microsoft.com> CC: Stable <sta...@vger.kernel.org> --- V2: Submit the patch to stable as well - Joshua R. Poulson <j...@pun.org> drivers/hv/hv_util.c | 10 +++++++--- 1 files changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/hv/hv_util.c b/drivers/hv/hv_util.c index 4aa3cb6..bcd0630 100644 --- a/drivers/hv/hv_util.c +++ b/drivers/hv/hv_util.c @@ -314,10 +314,14 @@ static void heartbeat_onchannelcallback(void *context) u8 *hbeat_txf_buf = util_heartbeat.recv_buffer; struct icmsg_negotiate *negop = NULL; - vmbus_recvpacket(channel, hbeat_txf_buf, - PAGE_SIZE, &recvlen, &requestid); + while (1) { + + vmbus_recvpacket(channel, hbeat_txf_buf, + PAGE_SIZE, &recvlen, &requestid); + + if (!recvlen) + break; - if (recvlen > 0) { icmsghdrp = (struct icmsg_hdr *)&hbeat_txf_buf[ sizeof(struct vmbuspipe_hdr)]; To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1632786/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
