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authorKevin Barnett <kevin.barnett@hpe.com>2017-05-04 02:54:25 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2017-06-13 03:48:03 +0300
commitd727a776d72b26033161bc19441266749455115b (patch)
treed1c8a26663bd657f579086aa118099e0a7dbe772 /drivers/scsi/smartpqi
parent4e8415e3861e8b73a47c92e09e044b9dbc8ee37f (diff)
downloadlinux-d727a776d72b26033161bc19441266749455115b.tar.xz
scsi: smartpqi: enhance kdump
constrain resource usage during kdump to avoid kdump failures Reviewed-by: Scott Benesh <scott.benesh@microsemi.com> Signed-off-by: Kevin Barnett <kevin.barnett@microsemi.com> Signed-off-by: Don Brace <don.brace@microsemi.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/smartpqi')
-rw-r--r--drivers/scsi/smartpqi/smartpqi.h6
-rw-r--r--drivers/scsi/smartpqi/smartpqi_init.c45
2 files changed, 36 insertions, 15 deletions
diff --git a/drivers/scsi/smartpqi/smartpqi.h b/drivers/scsi/smartpqi/smartpqi.h
index be04bcb7db36..400d1fb59197 100644
--- a/drivers/scsi/smartpqi/smartpqi.h
+++ b/drivers/scsi/smartpqi/smartpqi.h
@@ -686,8 +686,10 @@ struct pqi_config_table_heartbeat {
__le32 heartbeat_counter;
};
-#define PQI_MAX_OUTSTANDING_REQUESTS ((u32)~0)
-#define PQI_MAX_TRANSFER_SIZE (4 * 1024U * 1024U)
+#define PQI_MAX_OUTSTANDING_REQUESTS ((u32)~0)
+#define PQI_MAX_OUTSTANDING_REQUESTS_KDUMP 32
+#define PQI_MAX_TRANSFER_SIZE (4 * 1024U * 1024U)
+#define PQI_MAX_TRANSFER_SIZE_KDUMP (512 * 1024U)
#define RAID_MAP_MAX_ENTRIES 1024
diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c
index fa6102173d2a..cdc3407572a5 100644
--- a/drivers/scsi/smartpqi/smartpqi_init.c
+++ b/drivers/scsi/smartpqi/smartpqi_init.c
@@ -4353,8 +4353,12 @@ static void pqi_calculate_io_resources(struct pqi_ctrl_info *ctrl_info)
ctrl_info->error_buffer_length =
ctrl_info->max_io_slots * PQI_ERROR_BUFFER_ELEMENT_LENGTH;
- max_transfer_size =
- min(ctrl_info->max_transfer_size, PQI_MAX_TRANSFER_SIZE);
+ if (reset_devices)
+ max_transfer_size = min(ctrl_info->max_transfer_size,
+ PQI_MAX_TRANSFER_SIZE_KDUMP);
+ else
+ max_transfer_size = min(ctrl_info->max_transfer_size,
+ PQI_MAX_TRANSFER_SIZE);
max_sg_entries = max_transfer_size / PAGE_SIZE;
@@ -4374,19 +4378,24 @@ static void pqi_calculate_io_resources(struct pqi_ctrl_info *ctrl_info)
static void pqi_calculate_queue_resources(struct pqi_ctrl_info *ctrl_info)
{
- int num_cpus;
- int max_queue_groups;
int num_queue_groups;
u16 num_elements_per_iq;
u16 num_elements_per_oq;
- max_queue_groups = min(ctrl_info->max_inbound_queues / 2,
- ctrl_info->max_outbound_queues - 1);
- max_queue_groups = min(max_queue_groups, PQI_MAX_QUEUE_GROUPS);
+ if (reset_devices) {
+ num_queue_groups = 1;
+ } else {
+ int num_cpus;
+ int max_queue_groups;
+
+ max_queue_groups = min(ctrl_info->max_inbound_queues / 2,
+ ctrl_info->max_outbound_queues - 1);
+ max_queue_groups = min(max_queue_groups, PQI_MAX_QUEUE_GROUPS);
- num_cpus = num_online_cpus();
- num_queue_groups = min(num_cpus, ctrl_info->max_msix_vectors);
- num_queue_groups = min(num_queue_groups, max_queue_groups);
+ num_cpus = num_online_cpus();
+ num_queue_groups = min(num_cpus, ctrl_info->max_msix_vectors);
+ num_queue_groups = min(num_queue_groups, max_queue_groups);
+ }
ctrl_info->num_queue_groups = num_queue_groups;
ctrl_info->max_hw_queue_index = num_queue_groups - 1;
@@ -5827,9 +5836,17 @@ static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info)
return rc;
}
- if (ctrl_info->max_outstanding_requests > PQI_MAX_OUTSTANDING_REQUESTS)
- ctrl_info->max_outstanding_requests =
- PQI_MAX_OUTSTANDING_REQUESTS;
+ if (reset_devices) {
+ if (ctrl_info->max_outstanding_requests >
+ PQI_MAX_OUTSTANDING_REQUESTS_KDUMP)
+ ctrl_info->max_outstanding_requests =
+ PQI_MAX_OUTSTANDING_REQUESTS_KDUMP;
+ } else {
+ if (ctrl_info->max_outstanding_requests >
+ PQI_MAX_OUTSTANDING_REQUESTS)
+ ctrl_info->max_outstanding_requests =
+ PQI_MAX_OUTSTANDING_REQUESTS;
+ }
pqi_calculate_io_resources(ctrl_info);
@@ -7110,4 +7127,6 @@ static void __attribute__((unused)) verify_structures(void)
PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >= PQI_MAX_OUTSTANDING_REQUESTS);
+ BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >=
+ PQI_MAX_OUTSTANDING_REQUESTS_KDUMP);
}