diff options
| author | Sumit Saxena <sumit.saxena@broadcom.com> | 2016-04-15 00:23:30 -0700 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2016-04-15 16:53:20 -0400 |
| commit | c3e385a1b985a9202ba7fbd0bdbdcb909905d00c (patch) | |
| tree | 6b3169c26e63024ef2cf127570f0b1336bf68cc3 /drivers/scsi/megaraid/megaraid_sas_fusion.c | |
| parent | 1f275f976fdc04bf1bfd06929d10852b1b05decc (diff) | |
| download | linux-c3e385a1b985a9202ba7fbd0bdbdcb909905d00c.tar.bz2 | |
megaraid_sas: reduce memory footprints in kdump mode
This patch will reduce memory footprints of megaraid_sas driver when
booted in kdump mode. Driver will not allocate memory for optional and
perfromance oriented features. Below are key changes done in
megaraid_sas driver to do this:
1. Limit Controller's queue depth to 100 in kdump mode.
2. Do not allocate memory for system info buffer and PD info buffer.
3. Disable performance oriented features e.g. Disable RDPQ mode, disable
dual queue depth, restrict to single MSI-x vector.
Signed-off-by: Sumit Saxena <sumit.saxena@broadcom.com>
Reviewed-by: Hannes Reinicke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/megaraid/megaraid_sas_fusion.c')
| -rw-r--r-- | drivers/scsi/megaraid/megaraid_sas_fusion.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c index 98a848bdfdc2..320c1a0952d0 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fusion.c +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c @@ -257,6 +257,9 @@ megasas_fusion_update_can_queue(struct megasas_instance *instance, int fw_boot_c if (!instance->is_rdpq) instance->max_fw_cmds = min_t(u16, instance->max_fw_cmds, 1024); + if (reset_devices) + instance->max_fw_cmds = min(instance->max_fw_cmds, + (u16)MEGASAS_KDUMP_QUEUE_DEPTH); /* * Reduce the max supported cmds by 1. This is to ensure that the * reply_q_sz (1 more than the max cmd that driver may send) |