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Adjusting MaxQ for Linux VM using LSI Logic driver

  • 1.  Adjusting MaxQ for Linux VM using LSI Logic driver

    Posted Jun 12, 2009 04:48 PM

    In an attempt to moderate Linux VM I/O throughput in a host with both Linux and Windows VMs, I am interested in reducing the Linux disk Queue depth.

    In looking at the /proc information for the LSI Logic SCSI module, see below, it looks like MaxQ is something that might be relevant.

    #cat /proc/scsi/mptspi/0

    ioc0: LSI53C1030 B0, FwRev=01032920h, Ports=1, MaxQ=128

    However, when I examine the module parameter for mptspi, MaxQ is not listed as a parameter.

    #modinfo -p mptspi

    mpt_saf_te: Force enabling SEP Processor: enable=1 (default=MPTSCSIH_SAF_TE=0)

    So, my question is whether or not MaxQ number is adjustable for the LSI Logic driver on Linux VM? If so, how can it it done?

    Thanks for any help in advance !