On 8/14/2017 11:40 PM, Keith Busch wrote:
blk_mq_get_request() does not release the callers queue usage counter
when allocation fails. The caller still needs to account for its own
queue usage when it is unable to allocate a request.
Fixes: 1ad43c0078b7 ("blk-mq: don't leak preempt counter/q_usage_counter when allocating rq failed")
Reported-by: Max Gurtovoy <maxg@xxxxxxxxxxxx>
Signed-off-by: Keith Busch <keith.busch@xxxxxxxxx>
---
tested with 4.13-rc5+ using the following commands in a loop:
1. modprobe nvme
2. sleep 10
3. modprobe -r nvme
Looks good,
Tested-by: Max Gurtovoy <maxg@xxxxxxxxxxxx>
