On 12/5/16, 8:20 AM, "Christoph Hellwig" <hch@xxxxxxxxxxxxx> wrote:
>> create mode 100644 drivers/scsi/qla2xxx/qla_bottom.c
>> create mode 100644 drivers/scsi/qla2xxx/qla_mq.c
>> create mode 100644 drivers/scsi/qla2xxx/qla_top.c
>
>What's the point of three new fairly small files, two of them very
>oddly named? Can't we keep the code together by logical groups?
Ack. Will merge code
>
>> + /* distill these fields down to 'online=0/1'
>> + * ha->flags.eeh_busy
>> + * ha->flags.pci_channel_io_perm_failure
>> + * base_vha->loop_state
>> + */
>> + uint32_t online:1;
>> + /* move vha->flags.difdix_supported here */
>> + uint32_t difdix_supported:1;
>> + uint32_t delete_in_progress:1;
>
>These probably should be atomic bitops.
Ack. Will update send out series.
>
>> +#define QLA_VHA_MARK_BUSY(__vha, __bail) do { \
>> + atomic_inc(&__vha->vref_count); \
>> + mb(); \
>> + if (__vha->flags.delete_progress) { \
>> + atomic_dec(&__vha->vref_count); \
>> + __bail = 1; \
>> + } else { \
>> + __bail = 0; \
>> + } \
>> } while (0)
>
>Something like this should be an inline function, not a macro
>that returns through an argument.
>
>(and move to lower case it while at it, please).
>
>Btw, the way vref_count is used looks incredibly buggy, instead
>of the busy wait just add a waie queue to sleep on in
>qla24xx_deallocate_vp_id.
We’ll work on this change and post as a separate patch.
>
>> + QLA_QPAIR_MARK_BUSY(qpair, bail);
>> + if (unlikely(bail))
>> + return NULL;
>> +
>> + sp = mempool_alloc(qpair->srb_mempool, flag);
>> + if (!sp)
>> + goto done;
>> +
>> + memset(sp, 0, sizeof(*sp));
>> + sp->fcport = fcport;
>> + sp->iocbs = 1;
>
>FYI, the blk-mq model would be to allocate the srps as part of the
>scsi_cmd by setting the cmd_size field in the host template. Note
>that this is also supported for the non-blk-mq path.
>
>> + qpair->delete_in_progress = 1;
>> + while (atomic_read(&qpair->ref_count))
>> + msleep(500);
>
>Please use a waitqueue instead of a busy wait here as well.
We’ll work on cleanup patch as separate patch.
>
>> +int ql2xmqsupport;
>> +module_param(ql2xmqsupport, int, S_IRUGO);
>> +MODULE_PARM_DESC(ql2xmqsupport,
>> + "Enable on demand multiple queue pairs support "
>> + "Default is 0 for no support. "
>> + "Set it to 1 to turn on mq qpair support.");
>
>Why isn't this enabled by default?
Ack. Will enable it by default.
>
>> + ha->queue_pair_map = kzalloc(sizeof(struct qla_qpair *)
>> + * ha->max_qpairs, GFP_KERNEL);
>
>Use kcalloc instead.
Ack. Will update this.
>
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