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| 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.h | |
| parent | 1f275f976fdc04bf1bfd06929d10852b1b05decc (diff) | |
| download | linux-next-c3e385a1b985a9202ba7fbd0bdbdcb909905d00c.tar.gz | |
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.h')
| -rw-r--r-- | drivers/scsi/megaraid/megaraid_sas.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h index fce414a2cd76..1784b09523d3 100644 --- a/drivers/scsi/megaraid/megaraid_sas.h +++ b/drivers/scsi/megaraid/megaraid_sas.h @@ -1344,6 +1344,8 @@ struct megasas_ctrl_info { #define SCAN_PD_CHANNEL 0x1 #define SCAN_VD_CHANNEL 0x2 +#define MEGASAS_KDUMP_QUEUE_DEPTH 100 + enum MR_SCSI_CMD_TYPE { READ_WRITE_LDIO = 0, NON_READ_WRITE_LDIO = 1, |