scsi/block: NUMA-local allocations and false-sharing fixes#717
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Allocate scsi_device and scsi_target on the same NUMA node as the host adapter's DMA device to improve memory locality and reduce cross-node traffic. Signed-off-by: James Rizzo <james.rizzo@broadcom.com> Signed-off-by: Sumit Saxena <sumit.saxena@broadcom.com>
…ntion Place nr_active_requests_shared_tags on its own cache line so it does not share a cache line with nr_requests and other hot fields, avoiding significant performance hits from false sharing on some CPU architectures. Signed-off-by: James Rizzo <james.rizzo@broadcom.com> Signed-off-by: Sumit Saxena <sumit.saxena@broadcom.com>
Place iodone_cnt on its own cache line so it does not share a cache line with iorequest_cnt, avoiding significant performance hits from false sharing when request and completion paths update these counters on some CPU architectures. Signed-off-by: James Rizzo <james.rizzo@broadcom.com> Signed-off-by: Sumit Saxena <sumit.saxena@broadcom.com>
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Pull request for series with
subject: scsi/block: NUMA-local allocations and false-sharing fixes
version: 1
url: https://patchwork.kernel.org/project/linux-block/list/?series=1076242