[Bug 121531] Adaptec 7805H SAS HBA (pm80xx): hangs when writing >80MB at once

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https://bugzilla.kernel.org/show_bug.cgi?id=121531

--- Comment #23 from Chloé Desoutter <chloe@xxxxxxxxxxxxxxxxx> ---
I can trigger crashes after a long while in a heavy workload, quite randomly,
with 256.

Out of curiosity I checked the pmspcv driver from FreeBSD and they use a lower
value still :


#define MPI_MAX_INBOUND_QUEUES          64     /**< Maximum number of inbound
queues */
#define MPI_MAX_OUTBOUND_QUEUES         64     /**< Maximum number of outbound
queues */

                                               /**< Max # of memory chunks
supported */
#define MPI_MAX_MEM_REGIONS             (MPI_MAX_INBOUND_QUEUES +
MPI_MAX_OUTBOUND_QUEUES) + 4
#define MPI_LOGSIZE                     4096  /**< default size */

so I'll try with this value and give feedback for stability and performance.

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