16fc1ec3ba
The policy is to try to allocate with KM_NOSLEEP, which will lead to memory allocation with GFP_ATOMIC, and if it fails, it will launch an taskq to expand slab space. This way it should be able to get better NUMA memory locality and reduce the overhead of context switch. Signed-off-by: Jinshan Xiong <jinshan.xiong@gmail.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #551