On 12/17/24 19:29, Daniel Wagner wrote:
Multiqueue devices should only allocate queues for the housekeeping CPUs when isolcpus=managed_irq is set. This avoids that the isolated CPUs get disturbed with OS workload. Add two variants of helpers which calculates the correct number of queues which should be used. The need for two variants is necessary because some drivers calculate their max number of queues based on the possible CPU mask, others based on the online CPU mask. Reviewed-by: Christoph Hellwig <hch@xxxxxx> Signed-off-by: Daniel Wagner <wagi@xxxxxxxxxx> --- block/blk-mq-cpumap.c | 45 +++++++++++++++++++++++++++++++++++++++++++++ include/linux/blk-mq.h | 2 ++ 2 files changed, 47 insertions(+)
Reviewed-by: Hannes Reinecke <hare@xxxxxxx> Cheers, Hannes -- Dr. Hannes Reinecke Kernel Storage Architect hare@xxxxxxx +49 911 74053 688 SUSE Software Solutions GmbH, Frankenstr. 146, 90461 Nürnberg HRB 36809 (AG Nürnberg), GF: I. Totev, A. McDonald, W. Knoblich
