9695 Slow crash dumps, significantly slower than live core
Reviewed by: Dan Fields <dan.fields@nexenta.com>
Reviewed by: Yuri Pankov <yuri.pankov@nexenta.com>
Reviewed by: Rick McNeal <rick.mcneal@nexenta.com>
Reviewed by: Sanjay Nadkarni <sanjay.nadkarni@nexenta.com>
Reviewed by: Toomas Soome <tsoome@me.com>
Reviewed by: Robert Mustacchi <rm@joyent.com>

*** 14,24 ****
   *              Rasheed
   *              Shakeel Bukhari
   */
  
  /*
!  * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
   * Copyright 2015, 2017 Citrus IT Limited. All rights reserved.
   * Copyright 2015 Garrett D'Amore <garrett@damore.org>
   */
  
  
--- 14,24 ----
   *              Rasheed
   *              Shakeel Bukhari
   */
  
  /*
!  * Copyright 2018 Nexenta Systems, Inc.
   * Copyright 2015, 2017 Citrus IT Limited. All rights reserved.
   * Copyright 2015 Garrett D'Amore <garrett@damore.org>
   */
  
  
*** 50,60 ****
  extern ddi_dma_attr_t mrsas_generic_dma_attr;
  extern uint32_t mrsas_tbolt_max_cap_maxxfer;
  extern struct ddi_device_acc_attr endian_attr;
  extern int      debug_level_g;
  extern unsigned int     enable_fp;
! volatile int dump_io_wait_time = 90;
  extern volatile int  debug_timeout_g;
  extern int      mrsas_issue_pending_cmds(struct mrsas_instance *);
  extern int mrsas_complete_pending_cmds(struct mrsas_instance *instance);
  extern void     push_pending_mfi_pkt(struct mrsas_instance *,
                          struct mrsas_cmd *);
--- 50,60 ----
  extern ddi_dma_attr_t mrsas_generic_dma_attr;
  extern uint32_t mrsas_tbolt_max_cap_maxxfer;
  extern struct ddi_device_acc_attr endian_attr;
  extern int      debug_level_g;
  extern unsigned int     enable_fp;
! volatile int dump_io_wait_time = 900;
  extern volatile int  debug_timeout_g;
  extern int      mrsas_issue_pending_cmds(struct mrsas_instance *);
  extern int mrsas_complete_pending_cmds(struct mrsas_instance *instance);
  extern void     push_pending_mfi_pkt(struct mrsas_instance *,
                          struct mrsas_cmd *);
*** 1106,1116 ****
                   * except ldsync command and aen command
                   */
                  if (instance->fw_outstanding <= 2) {
                          break;
                  }
!                 drv_usecwait(10*MILLISEC);
                  /* complete commands from reply queue */
                  (void) mr_sas_tbolt_process_outstanding_cmd(instance);
          }
          if (instance->fw_outstanding > 2) {
                  return (1);
--- 1106,1116 ----
                   * except ldsync command and aen command
                   */
                  if (instance->fw_outstanding <= 2) {
                          break;
                  }
!                 drv_usecwait(MILLISEC);
                  /* complete commands from reply queue */
                  (void) mr_sas_tbolt_process_outstanding_cmd(instance);
          }
          if (instance->fw_outstanding > 2) {
                  return (1);