diff options
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/storvsc_drv.c | 50 |
1 files changed, 19 insertions, 31 deletions
diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c index d3897c438448..a66711935912 100644 --- a/drivers/scsi/storvsc_drv.c +++ b/drivers/scsi/storvsc_drv.c @@ -474,13 +474,6 @@ struct storvsc_device { * Mask of CPUs bound to subchannels. */ struct cpumask alloced_cpus; - /* - * Pre-allocated struct cpumask for each hardware queue. - * struct cpumask is used by selecting out-going channels. It is a - * big structure, default to 1024k bytes when CONFIG_MAXSMP=y. - * Pre-allocate it to avoid allocation on the kernel stack. - */ - struct cpumask *cpumask_chns; /* Used for vsc/vsp channel reset process */ struct storvsc_cmd_request init_request; struct storvsc_cmd_request reset_request; @@ -885,13 +878,6 @@ static int storvsc_channel_init(struct hv_device *device, bool is_fc) if (stor_device->stor_chns == NULL) return -ENOMEM; - stor_device->cpumask_chns = kcalloc(num_possible_cpus(), - sizeof(struct cpumask), GFP_KERNEL); - if (stor_device->cpumask_chns == NULL) { - kfree(stor_device->stor_chns); - return -ENOMEM; - } - stor_device->stor_chns[device->channel->target_cpu] = device->channel; cpumask_set_cpu(device->channel->target_cpu, &stor_device->alloced_cpus); @@ -1252,7 +1238,6 @@ static int storvsc_dev_remove(struct hv_device *device) vmbus_close(device->channel); kfree(stor_device->stor_chns); - kfree(stor_device->cpumask_chns); kfree(stor_device); return 0; } @@ -1262,7 +1247,7 @@ static struct vmbus_channel *get_og_chn(struct storvsc_device *stor_device, { u16 slot = 0; u16 hash_qnum; - struct cpumask *alloced_mask = &stor_device->cpumask_chns[q_num]; + const struct cpumask *node_mask; int num_channels, tgt_cpu; if (stor_device->num_sc == 0) @@ -1278,10 +1263,13 @@ static struct vmbus_channel *get_og_chn(struct storvsc_device *stor_device, * III. Mapping is persistent. */ - cpumask_and(alloced_mask, &stor_device->alloced_cpus, - cpumask_of_node(cpu_to_node(q_num))); + node_mask = cpumask_of_node(cpu_to_node(q_num)); - num_channels = cpumask_weight(alloced_mask); + num_channels = 0; + for_each_cpu(tgt_cpu, &stor_device->alloced_cpus) { + if (cpumask_test_cpu(tgt_cpu, node_mask)) + num_channels++; + } if (num_channels == 0) return stor_device->device->channel; @@ -1289,7 +1277,9 @@ static struct vmbus_channel *get_og_chn(struct storvsc_device *stor_device, while (hash_qnum >= num_channels) hash_qnum -= num_channels; - for_each_cpu(tgt_cpu, alloced_mask) { + for_each_cpu(tgt_cpu, &stor_device->alloced_cpus) { + if (!cpumask_test_cpu(tgt_cpu, node_mask)) + continue; if (slot == hash_qnum) break; slot++; @@ -1308,7 +1298,7 @@ static int storvsc_do_io(struct hv_device *device, struct vstor_packet *vstor_packet; struct vmbus_channel *outgoing_channel, *channel; int ret = 0; - struct cpumask *alloced_mask; + const struct cpumask *node_mask; int tgt_cpu; vstor_packet = &request->vstor_packet; @@ -1329,11 +1319,11 @@ static int storvsc_do_io(struct hv_device *device, * Ideally, we want to pick a different channel if * available on the same NUMA node. */ - alloced_mask = &stor_device->cpumask_chns[q_num]; - cpumask_and(alloced_mask, &stor_device->alloced_cpus, - cpumask_of_node(cpu_to_node(q_num))); - - for_each_cpu_wrap(tgt_cpu, alloced_mask, q_num + 1) { + node_mask = cpumask_of_node(cpu_to_node(q_num)); + for_each_cpu_wrap(tgt_cpu, + &stor_device->alloced_cpus, q_num + 1) { + if (!cpumask_test_cpu(tgt_cpu, node_mask)) + continue; if (tgt_cpu == q_num) continue; channel = stor_device->stor_chns[tgt_cpu]; @@ -1359,10 +1349,9 @@ static int storvsc_do_io(struct hv_device *device, * NUMA node are busy. Try to find a channel in * other NUMA nodes */ - cpumask_andnot(alloced_mask, &stor_device->alloced_cpus, - cpumask_of_node(cpu_to_node(q_num))); - - for_each_cpu(tgt_cpu, alloced_mask) { + for_each_cpu(tgt_cpu, &stor_device->alloced_cpus) { + if (cpumask_test_cpu(tgt_cpu, node_mask)) + continue; channel = stor_device->stor_chns[tgt_cpu]; if (hv_get_avail_to_write_percent( &channel->outbound) @@ -1911,7 +1900,6 @@ err_out2: err_out1: kfree(stor_device->stor_chns); - kfree(stor_device->cpumask_chns); kfree(stor_device); err_out0: |