22b5560195
The admin and first IO queues shared the first irq vector, which has an affinity mask including cpu0. If a system allows cpu0 to be offlined, the admin queue may not be usable if no other CPUs in the affinity mask are online. This is a problem since unlike IO queues, there is only one admin queue that always needs to be usable. To fix, this patch allocates one pre_vector for the admin queue that is assigned all CPUs, so will always be accessible. The IO queues are assigned the remaining managed vectors. In case a controller has only one interrupt vector available, the admin and IO queues will share the pre_vector with all CPUs assigned. Cc: Jianchao Wang <jianchao.w.wang@oracle.com> Cc: Ming Lei <ming.lei@redhat.com> Signed-off-by: Keith Busch <keith.busch@intel.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk> |
||
|---|---|---|
| .. | ||
| host | ||
| target | ||
| Kconfig | ||
| Makefile | ||