scsi: mpt3sas: Load balance to improve performance and avoid soft lockups

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Driver uses "reply descriptor post queues" in round robin fashion so that
IO's are distributed to all the available reply descriptor post queues
equally.  With this each reply descriptor post queue load is balanced.

This is enabled only if CPUs count to MSI-X vector count ratio is X:1
(where X > 1) This improves performance and also fixes soft lockups.

Signed-off-by: Suganath Prabu <suganath-prabu.subramani@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

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Suganath Prabu 2019-02-15 02:40:28 -05:00 • committed by Martin K. Petersen

parent 320e77acb3

commit 51e3b2ad6d

2 changed files with 26 additions and 0 deletions

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21

drivers/scsi/mpt3sas/mpt3sas_base.c

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5

drivers/scsi/mpt3sas/mpt3sas_base.h

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