This patch series intends to summarize the recent contributions made by Michael S. Tsirkin, Tetsuo Handa, Michal Hocko etc. via reporting and discussing the related deadlock issues on the mailinglist. Please check each patch for details. >From a high-level point of view, this patch series achieves: 1) eliminate the deadlock issue fundamentally caused by the inability to run leak_balloon and fill_balloon concurrently; 2) enable OOM to release more than 256 inflated pages; and 3) stop inflating when the guest is under severe memory pressure (i.e. OOM). Here is an example of the benefit brought by this patch series: The guest sets virtio_balloon.oom_pages=100000. When the host requests to inflate 7.9G of an 8G idle guest, the guest can still run normally since OOM can guarantee at least 100000 pages (400MB) for the guest. Without the above patches, the guest will kill all the killable processes and fall into kernel panic finally. Wei Wang (3): virtio-balloon: replace the coarse-grained balloon_lock virtio-balloon: deflate up to oom_pages on OOM virtio-balloon: stop inflating when OOM occurs drivers/virtio/virtio_balloon.c | 149 ++++++++++++++++++++++++---------------- 1 file changed, 91 insertions(+), 58 deletions(-) -- 2.7.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
