From: Ming Lei <ming.lei@redhat.com>
To: John Garry <john.garry@huawei.com>
Cc: axboe@kernel.dk, jejb@linux.ibm.com, martin.petersen@oracle.com,
hare@suse.de, bvanassche@acm.org, hch@infradead.org,
linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-scsi@vger.kernel.org,
virtualization@lists.linux-foundation.org,
esc.storagedev@microsemi.com, chenxiang66@hisilicon.com,
Hannes Reinecke <hare@suse.com>
Subject: Re: [PATCH RFC v2 12/24] hpsa: use reserved commands
Date: Wed, 11 Mar 2020 16:10:59 +0800 [thread overview]
Message-ID: <20200311081059.GC31504@ming.t460p> (raw)
In-Reply-To: <1583857550-12049-13-git-send-email-john.garry@huawei.com>
On Wed, Mar 11, 2020 at 12:25:38AM +0800, John Garry wrote:
> From: Hannes Reinecke <hare@suse.com>
>
> Enable the use of reserved commands, and drop the hand-crafted
> command allocation.
>
> Signed-off-by: Hannes Reinecke <hare@suse.com>
> ---
> drivers/scsi/hpsa.c | 147 ++++++++++++++------------------------------
> drivers/scsi/hpsa.h | 1 -
> 2 files changed, 45 insertions(+), 103 deletions(-)
>
> diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
> index 703f824584fe..c14dd4b6e598 100644
> --- a/drivers/scsi/hpsa.c
> +++ b/drivers/scsi/hpsa.c
> @@ -244,10 +244,6 @@ static struct hpsa_scsi_dev_t
> *hpsa_find_device_by_sas_rphy(struct ctlr_info *h,
> struct sas_rphy *rphy);
>
> -#define SCSI_CMD_BUSY ((struct scsi_cmnd *)&hpsa_cmd_busy)
> -static const struct scsi_cmnd hpsa_cmd_busy;
> -#define SCSI_CMD_IDLE ((struct scsi_cmnd *)&hpsa_cmd_idle)
> -static const struct scsi_cmnd hpsa_cmd_idle;
> static int number_of_controllers;
>
> static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id);
> @@ -342,7 +338,7 @@ static inline struct ctlr_info *shost_to_hba(struct Scsi_Host *sh)
>
> static inline bool hpsa_is_cmd_idle(struct CommandList *c)
> {
> - return c->scsi_cmd == SCSI_CMD_IDLE;
> + return c->scsi_cmd == NULL;
> }
>
> /* extract sense key, asc, and ascq from sense data. -1 means invalid. */
> @@ -2445,7 +2441,12 @@ static void hpsa_cmd_resolve_events(struct ctlr_info *h,
> * this command has completed. Then, check to see if the handler is
> * waiting for this command, and, if so, wake it.
> */
> - c->scsi_cmd = SCSI_CMD_IDLE;
> + if (c->scsi_cmd && c->cmd_type == CMD_IOCTL_PEND) {
> + struct scsi_cmnd *scmd = c->scsi_cmd;
> +
> + scsi_put_reserved_cmd(scmd);
> + }
> + c->scsi_cmd = NULL;
> mb(); /* Declare command idle before checking for pending events. */
> if (dev) {
> atomic_dec(&dev->commands_outstanding);
> @@ -5502,7 +5503,6 @@ static void hpsa_cmd_init(struct ctlr_info *h, int index,
> c->ErrDesc.Addr = cpu_to_le64((u64) err_dma_handle);
> c->ErrDesc.Len = cpu_to_le32((u32) sizeof(*c->err_info));
> c->h = h;
> - c->scsi_cmd = SCSI_CMD_IDLE;
> }
>
> static void hpsa_preinitialize_commands(struct ctlr_info *h)
> @@ -5803,6 +5803,7 @@ static int hpsa_scsi_host_alloc(struct ctlr_info *h)
> sh->max_lun = HPSA_MAX_LUN;
> sh->max_id = HPSA_MAX_LUN;
> sh->can_queue = h->nr_cmds - HPSA_NRESERVED_CMDS;
> + sh->nr_reserved_cmds = HPSA_NRESERVED_CMDS;
Now .nr_reserved_cmds has been passed to blk-mq, you need to increase
sh->can_queue to h->nr_cmds, because .can_queue is the whole queue depth
(include the part of reserved tags), otherwise, IO tags will be
decreased.
Not look into other drivers, I guess they need such change too.
Thanks,
Ming
next prev parent reply other threads:[~2020-03-11 8:11 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-10 16:25 [PATCH RFC v2 00/24] scsi: enable reserved commands for LLDDs John Garry
2020-03-10 16:25 ` [PATCH RFC v2 01/24] scsi: add 'nr_reserved_cmds' field to the SCSI host template John Garry
2020-03-10 23:08 ` Ming Lei
2020-03-11 6:55 ` Hannes Reinecke
2020-03-11 8:00 ` Ming Lei
2020-03-10 16:25 ` [PATCH RFC v2 02/24] scsi: allocate separate queue for reserved commands John Garry
2020-03-10 18:32 ` Christoph Hellwig
2020-03-10 21:08 ` John Garry
2020-03-11 6:22 ` Christoph Hellwig
2020-03-11 6:58 ` Hannes Reinecke
2020-03-11 7:51 ` John Garry
2020-04-06 9:05 ` Hannes Reinecke
2020-04-07 11:54 ` John Garry
2020-04-07 14:00 ` Hannes Reinecke
2020-04-07 14:35 ` John Garry
2020-04-07 14:45 ` Hannes Reinecke
2020-04-07 15:19 ` John Garry
2020-04-07 16:30 ` Christoph Hellwig
2020-04-23 14:13 ` John Garry
2020-04-23 14:49 ` Hannes Reinecke
2020-04-23 15:33 ` John Garry
2020-03-10 16:25 ` [PATCH RFC v2 03/24] blk-mq: Implement blk_mq_rq_is_reserved() John Garry
2020-03-10 16:25 ` [PATCH RFC v2 04/24] scsi: Add scsi_{get, put}_reserved_cmd() John Garry
2020-03-10 16:25 ` [PATCH RFC v2 05/24] csiostor: use reserved command for LUN reset John Garry
2020-03-10 16:25 ` [PATCH RFC v2 06/24] scsi: add scsi_cmd_from_priv() John Garry
2020-03-10 16:25 ` [PATCH RFC v2 07/24] virtio_scsi: use reserved commands for TMF John Garry
2020-03-10 16:25 ` [PATCH RFC v2 08/24] scsi: add host tagset busy iterator John Garry
2020-03-10 16:25 ` [PATCH RFC v2 09/24] fnic: use reserved commands John Garry
2020-03-10 16:25 ` [PATCH RFC v2 10/24] fnic: use scsi_host_tagset_busy_iter() to traverse commands John Garry
2020-03-10 16:25 ` [PATCH RFC v2 11/24] hpsa: move hpsa_hba_inquiry after scsi_add_host() John Garry
2020-03-10 16:25 ` [PATCH RFC v2 12/24] hpsa: use reserved commands John Garry
2020-03-11 8:10 ` Ming Lei [this message]
2020-03-17 9:38 ` John Garry
2020-03-17 9:48 ` Hannes Reinecke
2020-03-30 13:42 ` John Garry
2020-03-10 16:25 ` [PATCH RFC v2 13/24] hpsa: use blk_mq_tagset_busy_iter() to traverse outstanding commands John Garry
2020-03-10 16:25 ` [PATCH RFC v2 14/24] hpsa: drop refcount field from CommandList John Garry
2020-03-10 16:25 ` [PATCH RFC v2 15/24] snic: use reserved commands John Garry
2020-03-10 16:25 ` [PATCH RFC v2 16/24] snic: use tagset iter for traversing commands John Garry
2020-03-10 16:25 ` [PATCH RFC v2 17/24] aacraid: move scsi_add_host() John Garry
2020-03-10 16:25 ` [PATCH RFC v2 18/24] aacraid: use private commands John Garry
2020-03-10 16:25 ` [PATCH RFC v2 19/24] aacraid: replace cmd_list with scsi_host_tagset_busy_iter() John Garry
2020-03-10 16:25 ` [PATCH RFC v2 20/24] aacraid: use scsi_host_tagset_busy_iter() to traverse outstanding commands John Garry
2020-03-10 16:25 ` [PATCH RFC v2 21/24] dpt_i2o: drop cmd_list usage John Garry
2020-03-10 16:25 ` [PATCH RFC v2 22/24] scsi: drop scsi command list John Garry
2020-03-10 18:35 ` Christoph Hellwig
2020-03-10 20:47 ` John Garry
2020-03-10 16:25 ` [PATCH RFC v2 23/24] scsi: libsas: aic94xx: hisi_sas: mvsas: pm8001: Allocate Scsi_cmd for slow task John Garry
2020-03-10 16:25 ` [PATCH RFC v2 24/24] scsi: hisi_sas: Use libsas slow task SCSI command John Garry
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