On 7/2/25 18:33, Daniel Wagner wrote:
When isolcpus=io_queue is enabled, and the last housekeeping CPU for a given hctx goes offline, there would be no CPU left to handle I/O. To prevent I/O stalls, prevent offlining housekeeping CPUs that are still serving isolated CPUs. When isolcpus=io_queue is enabled and the last housekeeping CPU for a given hctx goes offline, no CPU would be left to handle I/O. To prevent I/O stalls, disallow offlining housekeeping CPUs that are still serving isolated CPUs. Signed-off-by: Daniel Wagner <wagi@xxxxxxxxxx> --- block/blk-mq.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 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
