| Message ID | 20211101083813.1224522-1-xuemingl@nvidia.com |
|---|---|
| Headers | show
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Improve vhost-user VQ notifier unmap
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expand
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When vDPA applicaiton in client mode shutdown, unmapped VQ notifier might being accessed by vCPU thread under high tx traffic, it will crash VM in rare conditon. This patch try to fix it with better RCU sychronization of new flatview. v2: no RCU draining on vCPU thread v3: minor fix on coding style and comments https://lists.nongnu.org/archive/html/qemu-devel/2021-10/msg01764.html v4: fix first patch compilation https://lists.nongnu.org/archive/html/qemu-devel/2021-10/msg04060.html v5: update 2/2 commit message https://lists.nongnu.org/archive/html/qemu-devel/2021-10/msg04115.html v6: use call_rcu to avoid dead lock in rcu reader Xueming Li (2): vhost-user: remove VirtQ notifier restore vhost-user: fix VirtQ notifier cleanup hw/virtio/vhost-user.c | 63 ++++++++++++++++------------------ include/hw/virtio/vhost-user.h | 3 +- 2 files changed, 31 insertions(+), 35 deletions(-)