Sagi Grimberg 8407879c4e nvmet-rdma: fix possible bogus dereference under heavy load ... Currently we always repost the recv buffer before we send a response capsule back to the host. Since ordering is not guaranteed for send and recv completions, it is posible that we will receive a new request from the host before we got a send completion for the response capsule. Today, we pre-allocate 2x rsps the length of the queue, but in reality, under heavy load there is nothing that is really preventing the gap to expand until we exhaust all our rsps. To fix this, if we don't have any pre-allocated rsps left, we dynamically allocate a rsp and make sure to free it when we are done. If under memory pressure we fail to allocate a rsp, we silently drop the command and wait for the host to retry. Reported-by: Steve Wise <swise@opengridcomputing.com> Tested-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Sagi Grimberg <sagi@grimberg.me> [hch: dropped a superflous assignment] Signed-off-by: Christoph Hellwig <hch@lst.de>		2018-09-05 12:18:01 -07:00
..
host	nvme-pci: add a memory barrier to nvme_dbbuf_update_and_check_event	2018-08-28 08:40:42 +02:00
target	nvmet-rdma: fix possible bogus dereference under heavy load	2018-09-05 12:18:01 -07:00
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