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block: Consolidate phys_segment and hw_segment limits 

Except for SCSI no device drivers distinguish between physical and
hardware segment limits.  Consolidate the two into a single segment
limit.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Martin K. Petersen 2010-02-26 00:20:39 -05:00 committed by Jens Axboe
parent 086fa5ff08
commit 8a78362c4e
35 changed files with 70 additions and 136 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/um/drivers/ubd_kern.c
View File

@ -849,7 +849,7 @@ static int ubd_add(int n, char **error_out)
}
ubd_dev->queue->queuedata = ubd_dev;
blk_queue_max_hw_segments(ubd_dev->queue, MAX_SG);
blk_queue_max_segments(ubd_dev->queue, MAX_SG);
err = ubd_disk_register(UBD_MAJOR, ubd_dev->size, n, &ubd_gendisk[n]);
if(err){
*error_out = "Failed to register device";

3
block/blk-core.c
View File

@ -1614,8 +1614,7 @@ int blk_rq_check_limits(struct request_queue *q, struct request *rq)
* limitation.
*/
blk_recalc_rq_segments(rq);
if (rq->nr_phys_segments > queue_max_phys_segments(q) ||
rq->nr_phys_segments > queue_max_hw_segments(q)) {
if (rq->nr_phys_segments > queue_max_segments(q)) {
printk(KERN_ERR "%s: over max segments limit.\n", __func__);
return -EIO;
}

8
block/blk-merge.c
View File

@ -206,8 +206,7 @@ static inline int ll_new_hw_segment(struct request_queue *q,
{
int nr_phys_segs = bio_phys_segments(q, bio);
if (req->nr_phys_segments + nr_phys_segs > queue_max_hw_segments(q) ||
req->nr_phys_segments + nr_phys_segs > queue_max_phys_segments(q)) {
if (req->nr_phys_segments + nr_phys_segs > queue_max_segments(q)) {
req->cmd_flags |= REQ_NOMERGE;
if (req == q->last_merge)
q->last_merge = NULL;
@ -300,10 +299,7 @@ static int ll_merge_requests_fn(struct request_queue *q, struct request *req,
total_phys_segments--;
}
if (total_phys_segments > queue_max_phys_segments(q))
return 0;
if (total_phys_segments > queue_max_hw_segments(q))
if (total_phys_segments > queue_max_segments(q))
return 0;
/* Merge is OK... */

60
block/blk-settings.c
View File

@ -91,8 +91,7 @@ EXPORT_SYMBOL_GPL(blk_queue_lld_busy);
*/
void blk_set_default_limits(struct queue_limits *lim)
{
lim->max_phys_segments = MAX_PHYS_SEGMENTS;
lim->max_hw_segments = MAX_HW_SEGMENTS;
lim->max_segments = BLK_MAX_SEGMENTS;
lim->seg_boundary_mask = BLK_SEG_BOUNDARY_MASK;
lim->max_segment_size = BLK_MAX_SEGMENT_SIZE;
lim->max_sectors = BLK_DEF_MAX_SECTORS;
@ -252,17 +251,15 @@ void blk_queue_max_discard_sectors(struct request_queue *q,
EXPORT_SYMBOL(blk_queue_max_discard_sectors);
/**
* blk_queue_max_phys_segments - set max phys segments for a request for this queue
* blk_queue_max_segments - set max hw segments for a request for this queue
* @q: the request queue for the device
* @max_segments: max number of segments
*
* Description:
* Enables a low level driver to set an upper limit on the number of
* physical data segments in a request. This would be the largest sized
* scatter list the driver could handle.
* hw data segments in a request.
**/
void blk_queue_max_phys_segments(struct request_queue *q,
unsigned short max_segments)
void blk_queue_max_segments(struct request_queue *q, unsigned short max_segments)
{
if (!max_segments) {
max_segments = 1;
@ -270,33 +267,9 @@ void blk_queue_max_phys_segments(struct request_queue *q,
__func__, max_segments);
}
q->limits.max_phys_segments = max_segments;
q->limits.max_segments = max_segments;
}
EXPORT_SYMBOL(blk_queue_max_phys_segments);
/**
* blk_queue_max_hw_segments - set max hw segments for a request for this queue
* @q: the request queue for the device
* @max_segments: max number of segments
*
* Description:
* Enables a low level driver to set an upper limit on the number of
* hw data segments in a request. This would be the largest number of
* address/length pairs the host adapter can actually give at once
* to the device.
**/
void blk_queue_max_hw_segments(struct request_queue *q,
unsigned short max_segments)
{
if (!max_segments) {
max_segments = 1;
printk(KERN_INFO "%s: set to minimum %d\n",
__func__, max_segments);
}
q->limits.max_hw_segments = max_segments;
}
EXPORT_SYMBOL(blk_queue_max_hw_segments);
EXPORT_SYMBOL(blk_queue_max_segments);
/**
* blk_queue_max_segment_size - set max segment size for blk_rq_map_sg
@ -531,11 +504,7 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b,
t->seg_boundary_mask = min_not_zero(t->seg_boundary_mask,
b->seg_boundary_mask);
t->max_phys_segments = min_not_zero(t->max_phys_segments,
b->max_phys_segments);
t->max_hw_segments = min_not_zero(t->max_hw_segments,
b->max_hw_segments);
t->max_segments = min_not_zero(t->max_segments, b->max_segments);
t->max_segment_size = min_not_zero(t->max_segment_size,
b->max_segment_size);
@ -739,22 +708,19 @@ EXPORT_SYMBOL(blk_queue_update_dma_pad);
* does is adjust the queue so that the buf is always appended
* silently to the scatterlist.
*
* Note: This routine adjusts max_hw_segments to make room for
* appending the drain buffer. If you call
* blk_queue_max_hw_segments() or blk_queue_max_phys_segments() after
* calling this routine, you must set the limit to one fewer than your
* device can support otherwise there won't be room for the drain
* buffer.
* Note: This routine adjusts max_hw_segments to make room for appending
* the drain buffer. If you call blk_queue_max_segments() after calling
* this routine, you must set the limit to one fewer than your device
* can support otherwise there won't be room for the drain buffer.
*/
int blk_queue_dma_drain(struct request_queue *q,
dma_drain_needed_fn *dma_drain_needed,
void *buf, unsigned int size)
{
if (queue_max_hw_segments(q) < 2 || queue_max_phys_segments(q) < 2)
if (queue_max_segments(q) < 2)
return -EINVAL;
/* make room for appending the drain */
blk_queue_max_hw_segments(q, queue_max_hw_segments(q) - 1);
blk_queue_max_phys_segments(q, queue_max_phys_segments(q) - 1);
blk_queue_max_segments(q, queue_max_segments(q) - 1);
q->dma_drain_needed = dma_drain_needed;
q->dma_drain_buffer = buf;
q->dma_drain_size = size;

2
drivers/ata/sata_nv.c
View File

@ -772,7 +772,7 @@ static int nv_adma_slave_config(struct scsi_device *sdev)
}
blk_queue_segment_boundary(sdev->request_queue, segment_boundary);
blk_queue_max_hw_segments(sdev->request_queue, sg_tablesize);
blk_queue_max_segments(sdev->request_queue, sg_tablesize);
ata_port_printk(ap, KERN_INFO,
"DMA mask 0x%llX, segment boundary 0x%lX, hw segs %hu\n",
(unsigned long long)*ap->host->dev->dma_mask,

2
drivers/block/DAC960.c
View File

@ -2534,7 +2534,7 @@ static bool DAC960_RegisterBlockDevice(DAC960_Controller_T *Controller)
blk_queue_bounce_limit(RequestQueue, Controller->BounceBufferLimit);
RequestQueue->queuedata = Controller;
blk_queue_max_hw_segments(RequestQueue, Controller->DriverScatterGatherLimit);
blk_queue_max_phys_segments(RequestQueue, Controller->DriverScatterGatherLimit);
blk_queue_max_segments(RequestQueue, Controller->DriverScatterGatherLimit);
blk_queue_max_hw_sectors(RequestQueue, Controller->MaxBlocksPerCommand);
disk->queue = RequestQueue;
sprintf(disk->disk_name, "rd/c%dd%d", Controller->ControllerNumber, n);

5
drivers/block/cciss.c
View File

@ -1797,10 +1797,7 @@ static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
/* This is a hardware imposed limit. */
blk_queue_max_hw_segments(disk->queue, h->maxsgentries);
/* This is a limit in the driver and could be eliminated. */
blk_queue_max_phys_segments(disk->queue, h->maxsgentries);
blk_queue_max_segments(disk->queue, h->maxsgentries);
blk_queue_max_hw_sectors(disk->queue, h->cciss_max_sectors);

5
drivers/block/cpqarray.c
View File

@ -448,11 +448,8 @@ static int __init cpqarray_register_ctlr( int i, struct pci_dev *pdev)
blk_queue_bounce_limit(q, hba[i]->pci_dev->dma_mask);
/* This is a hardware imposed limit. */
blk_queue_max_hw_segments(q, SG_MAX);
blk_queue_max_segments(q, SG_MAX);
/* This is a driver limit and could be eliminated. */
blk_queue_max_phys_segments(q, SG_MAX);
init_timer(&hba[i]->timer);
hba[i]->timer.expires = jiffies + IDA_TIMER;
hba[i]->timer.data = (unsigned long)hba[i];

3
drivers/block/drbd/drbd_nl.c
View File

@ -710,8 +710,7 @@ void drbd_setup_queue_param(struct drbd_conf *mdev, unsigned int max_seg_s) __mu
max_seg_s = min(queue_max_sectors(b) * queue_logical_block_size(b), max_seg_s);
blk_queue_max_hw_sectors(q, max_seg_s >> 9);
blk_queue_max_phys_segments(q, max_segments ? max_segments : MAX_PHYS_SEGMENTS);
blk_queue_max_hw_segments(q, max_segments ? max_segments : MAX_HW_SEGMENTS);
blk_queue_max_segments(q, max_segments ? max_segments : BLK_MAX_SEGMENTS);
blk_queue_max_segment_size(q, max_seg_s);
blk_queue_logical_block_size(q, 512);
blk_queue_segment_boundary(q, PAGE_SIZE-1);

3
drivers/block/paride/pf.c
View File

@ -956,8 +956,7 @@ static int __init pf_init(void)
return -ENOMEM;
}
blk_queue_max_phys_segments(pf_queue, cluster);
blk_queue_max_hw_segments(pf_queue, cluster);
blk_queue_max_segments(pf_queue, cluster);
for (pf = units, unit = 0; unit < PF_UNITS; pf++, unit++) {
struct gendisk *disk = pf->disk;

4
drivers/block/pktcdvd.c
View File

@ -950,14 +950,14 @@ static void pkt_iosched_process_queue(struct pktcdvd_device *pd)
static int pkt_set_segment_merging(struct pktcdvd_device *pd, struct request_queue *q)
{
if ((pd->settings.size << 9) / CD_FRAMESIZE
<= queue_max_phys_segments(q)) {
<= queue_max_segments(q)) {
/*
* The cdrom device can handle one segment/frame
*/
clear_bit(PACKET_MERGE_SEGS, &pd->flags);
return 0;
} else if ((pd->settings.size << 9) / PAGE_SIZE
<= queue_max_phys_segments(q)) {
<= queue_max_segments(q)) {
/*
* We can handle this case at the expense of some extra memory
* copies during write operations

3
drivers/block/ps3disk.c
View File

@ -482,8 +482,7 @@ static int __devinit ps3disk_probe(struct ps3_system_bus_device *_dev)
blk_queue_ordered(queue, QUEUE_ORDERED_DRAIN_FLUSH,
ps3disk_prepare_flush);
blk_queue_max_phys_segments(queue, -1);
blk_queue_max_hw_segments(queue, -1);
blk_queue_max_segments(queue, -1);
blk_queue_max_segment_size(queue, dev->bounce_size);
gendisk = alloc_disk(PS3DISK_MINORS);

3
drivers/block/ps3vram.c
View File

@ -751,8 +751,7 @@ static int __devinit ps3vram_probe(struct ps3_system_bus_device *dev)
priv->queue = queue;
queue->queuedata = dev;
blk_queue_make_request(queue, ps3vram_make_request);
blk_queue_max_phys_segments(queue, MAX_PHYS_SEGMENTS);
blk_queue_max_hw_segments(queue, MAX_HW_SEGMENTS);
blk_queue_max_segments(queue, BLK_MAX_HW_SEGMENTS);
blk_queue_max_segment_size(queue, BLK_MAX_SEGMENT_SIZE);
blk_queue_max_hw_sectors(queue, BLK_SAFE_MAX_SECTORS);

3
drivers/block/sunvdc.c
View File

@ -691,8 +691,7 @@ static int probe_disk(struct vdc_port *port)
port->disk = g;
blk_queue_max_hw_segments(q, port->ring_cookies);
blk_queue_max_phys_segments(q, port->ring_cookies);
blk_queue_max_segments(q, port->ring_cookies);
blk_queue_max_hw_sectors(q, port->max_xfer_size);
g->major = vdc_major;
g->first_minor = port->vio.vdev->dev_no << PARTITION_SHIFT;

3
drivers/block/sx8.c
View File

@ -1518,8 +1518,7 @@ static int carm_init_disks(struct carm_host *host)
break;
}
disk->queue = q;
blk_queue_max_hw_segments(q, CARM_MAX_REQ_SG);
blk_queue_max_phys_segments(q, CARM_MAX_REQ_SG);
blk_queue_max_segments(q, CARM_MAX_REQ_SG);
blk_queue_segment_boundary(q, CARM_SG_BOUNDARY);
q->queuedata = port;

3
drivers/block/ub.c
View File

@ -2320,8 +2320,7 @@ static int ub_probe_lun(struct ub_dev *sc, int lnum)
disk->queue = q;
blk_queue_bounce_limit(q, BLK_BOUNCE_HIGH);
blk_queue_max_hw_segments(q, UB_MAX_REQ_SG);
blk_queue_max_phys_segments(q, UB_MAX_REQ_SG);
blk_queue_max_segments(q, UB_MAX_REQ_SG);
blk_queue_segment_boundary(q, 0xffffffff); /* Dubious. */
blk_queue_max_hw_sectors(q, UB_MAX_SECTORS);
blk_queue_logical_block_size(q, lun->capacity.bsize);

3
drivers/block/viodasd.c
View File

@ -471,8 +471,7 @@ retry:
}
d->disk = g;
blk_queue_max_hw_segments(q, VIOMAXBLOCKDMA);
blk_queue_max_phys_segments(q, VIOMAXBLOCKDMA);
blk_queue_max_segments(q, VIOMAXBLOCKDMA);
blk_queue_max_hw_sectors(q, VIODASD_MAXSECTORS);
g->major = VIODASD_MAJOR;
g->first_minor = dev_no << PARTITION_SHIFT;

3
drivers/block/xen-blkfront.c
View File

@ -353,8 +353,7 @@ static int xlvbd_init_blk_queue(struct gendisk *gd, u16 sector_size)
blk_queue_max_segment_size(rq, PAGE_SIZE);
/* Ensure a merged request will fit in a single I/O ring slot. */
blk_queue_max_phys_segments(rq, BLKIF_MAX_SEGMENTS_PER_REQUEST);
blk_queue_max_hw_segments(rq, BLKIF_MAX_SEGMENTS_PER_REQUEST);
blk_queue_max_segments(rq, BLKIF_MAX_SEGMENTS_PER_REQUEST);
/* Make sure buffer addresses are sector-aligned. */
blk_queue_dma_alignment(rq, 511);

2
drivers/cdrom/gdrom.c
View File

@ -741,7 +741,7 @@ static int __devinit probe_gdrom_setupqueue(void)
{
blk_queue_logical_block_size(gd.gdrom_rq, GDROM_HARD_SECTOR);
/* using DMA so memory will need to be contiguous */
blk_queue_max_hw_segments(gd.gdrom_rq, 1);
blk_queue_max_segments(gd.gdrom_rq, 1);
/* set a large max size to get most from DMA */
blk_queue_max_segment_size(gd.gdrom_rq, 0x40000);
gd.disk->queue = gd.gdrom_rq;

3
drivers/cdrom/viocd.c
View File

@ -616,8 +616,7 @@ static int viocd_probe(struct vio_dev *vdev, const struct vio_device_id *id)
gendisk->first_minor = deviceno;
strncpy(gendisk->disk_name, c->name,
sizeof(gendisk->disk_name));
blk_queue_max_hw_segments(q, 1);
blk_queue_max_phys_segments(q, 1);
blk_queue_max_segments(q, 1);
blk_queue_max_hw_sectors(q, 4096 / 512);
gendisk->queue = q;
gendisk->fops = &viocd_fops;

3
drivers/ide/ide-probe.c
View File

@ -790,8 +790,7 @@ static int ide_init_queue(ide_drive_t *drive)
max_sg_entries >>= 1;
#endif /* CONFIG_PCI */
blk_queue_max_hw_segments(q, max_sg_entries);
blk_queue_max_phys_segments(q, max_sg_entries);
blk_queue_max_segments(q, max_sg_entries);
/* assign drive queue */
drive->queue = q;

2
drivers/md/raid5.c
View File

@ -3739,7 +3739,7 @@ static int bio_fits_rdev(struct bio *bi)
if ((bi->bi_size>>9) > queue_max_sectors(q))
return 0;
blk_recount_segments(q, bi);
if (bi->bi_phys_segments > queue_max_phys_segments(q))
if (bi->bi_phys_segments > queue_max_segments(q))
return 0;
if (q->merge_bvec_fn)

3
drivers/memstick/core/mspro_block.c
View File

@ -1227,8 +1227,7 @@ static int mspro_block_init_disk(struct memstick_dev *card)
blk_queue_bounce_limit(msb->queue, limit);
blk_queue_max_hw_sectors(msb->queue, MSPRO_BLOCK_MAX_PAGES);
blk_queue_max_phys_segments(msb->queue, MSPRO_BLOCK_MAX_SEGS);
blk_queue_max_hw_segments(msb->queue, MSPRO_BLOCK_MAX_SEGS);
blk_queue_max_segments(msb->queue, MSPRO_BLOCK_MAX_SEGS);
blk_queue_max_segment_size(msb->queue,
MSPRO_BLOCK_MAX_PAGES * msb->page_size);

3
drivers/message/i2o/i2o_block.c
View File

@ -1065,9 +1065,8 @@ static int i2o_block_probe(struct device *dev)
queue = gd->queue;
queue->queuedata = i2o_blk_dev;
blk_queue_max_phys_segments(queue, I2O_MAX_PHYS_SEGMENTS);
blk_queue_max_hw_sectors(queue, max_sectors);
blk_queue_max_hw_segments(queue, i2o_sg_tablesize(c, body_size));
blk_queue_max_segments(queue, i2o_sg_tablesize(c, body_size));
osm_debug("max sectors = %d\n", queue->max_sectors);
osm_debug("phys segments = %d\n", queue->max_phys_segments);

6
drivers/mmc/card/queue.c
View File

@ -155,8 +155,7 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, spinlock_t *lock
if (mq->bounce_buf) {
blk_queue_bounce_limit(mq->queue, BLK_BOUNCE_ANY);
blk_queue_max_hw_sectors(mq->queue, bouncesz / 512);
blk_queue_max_phys_segments(mq->queue, bouncesz / 512);
blk_queue_max_hw_segments(mq->queue, bouncesz / 512);
blk_queue_max_segments(mq->queue, bouncesz / 512);
blk_queue_max_segment_size(mq->queue, bouncesz);
mq->sg = kmalloc(sizeof(struct scatterlist),
@ -182,8 +181,7 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, spinlock_t *lock
blk_queue_bounce_limit(mq->queue, limit);
blk_queue_max_hw_sectors(mq->queue,
min(host->max_blk_count, host->max_req_size / 512));
blk_queue_max_phys_segments(mq->queue, host->max_phys_segs);
blk_queue_max_hw_segments(mq->queue, host->max_hw_segs);
blk_queue_max_segments(mq->queue, host->max_hw_segs);
blk_queue_max_segment_size(mq->queue, host->max_seg_size);
mq->sg = kmalloc(sizeof(struct scatterlist) *

3
drivers/s390/block/dasd.c
View File

@ -2130,8 +2130,7 @@ static void dasd_setup_queue(struct dasd_block *block)
blk_queue_logical_block_size(block->request_queue, block->bp_block);
max = block->base->discipline->max_blocks << block->s2b_shift;
blk_queue_max_hw_sectors(block->request_queue, max);
blk_queue_max_phys_segments(block->request_queue, -1L);
blk_queue_max_hw_segments(block->request_queue, -1L);
blk_queue_max_segments(block->request_queue, -1L);
/* with page sized segments we can translate each segement into
* one idaw/tidaw
*/

3
drivers/s390/char/tape_block.c
View File

@ -223,8 +223,7 @@ tapeblock_setup_device(struct tape_device * device)
blk_queue_logical_block_size(blkdat->request_queue, TAPEBLOCK_HSEC_SIZE);
blk_queue_max_hw_sectors(blkdat->request_queue, TAPEBLOCK_MAX_SEC);
blk_queue_max_phys_segments(blkdat->request_queue, -1L);
blk_queue_max_hw_segments(blkdat->request_queue, -1L);
blk_queue_max_segments(blkdat->request_queue, -1L);
blk_queue_max_segment_size(blkdat->request_queue, -1L);
blk_queue_segment_boundary(blkdat->request_queue, -1L);

4
drivers/scsi/ibmvscsi/ibmvfc.c
View File

@ -4195,7 +4195,7 @@ static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt)
if (tgt->service_parms.class3_parms[0] & 0x80000000)
rport->supported_classes |= FC_COS_CLASS3;
if (rport->rqst_q)
blk_queue_max_hw_segments(rport->rqst_q, 1);
blk_queue_max_segments(rport->rqst_q, 1);
} else
tgt_dbg(tgt, "rport add failed\n");
spin_unlock_irqrestore(vhost->host->host_lock, flags);
@ -4669,7 +4669,7 @@ static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
}
if (shost_to_fc_host(shost)->rqst_q)
blk_queue_max_hw_segments(shost_to_fc_host(shost)->rqst_q, 1);
blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1);
dev_set_drvdata(dev, vhost);
spin_lock(&ibmvfc_driver_lock);
list_add_tail(&vhost->queue, &ibmvfc_head);

4
drivers/scsi/scsi_lib.c
View File

@ -1624,8 +1624,8 @@ struct request_queue *__scsi_alloc_queue(struct Scsi_Host *shost,
/*
* this limit is imposed by hardware restrictions
*/
blk_queue_max_hw_segments(q, shost->sg_tablesize);
blk_queue_max_phys_segments(q, SCSI_MAX_SG_CHAIN_SEGMENTS);
blk_queue_max_segments(q, min_t(unsigned short, shost->sg_tablesize,
SCSI_MAX_SG_CHAIN_SEGMENTS));
blk_queue_max_hw_sectors(q, shost->max_sectors);
blk_queue_bounce_limit(q, scsi_calculate_bounce_limit(shost));

6
drivers/scsi/sg.c
View File

@ -287,8 +287,7 @@ sg_open(struct inode *inode, struct file *filp)
if (list_empty(&sdp->sfds)) { /* no existing opens on this device */
sdp->sgdebug = 0;
q = sdp->device->request_queue;
sdp->sg_tablesize = min(queue_max_hw_segments(q),
queue_max_phys_segments(q));
sdp->sg_tablesize = queue_max_segments(q);
}
if ((sfp = sg_add_sfp(sdp, dev)))
filp->private_data = sfp;
@ -1376,8 +1375,7 @@ static Sg_device *sg_alloc(struct gendisk *disk, struct scsi_device *scsidp)
sdp->device = scsidp;
INIT_LIST_HEAD(&sdp->sfds);
init_waitqueue_head(&sdp->o_excl_wait);
sdp->sg_tablesize = min(queue_max_hw_segments(q),
queue_max_phys_segments(q));
sdp->sg_tablesize = queue_max_segments(q);
sdp->index = k;
kref_init(&sdp->d_ref);

3
drivers/scsi/st.c
View File

@ -3983,8 +3983,7 @@ static int st_probe(struct device *dev)
return -ENODEV;
}
i = min(queue_max_hw_segments(SDp->request_queue),
queue_max_phys_segments(SDp->request_queue));
i = queue_max_segments(SDp->request_queue);
if (st_max_sg_segs < i)
i = st_max_sg_segs;
buffer = new_tape_buffer((SDp->host)->unchecked_isa_dma, i);

5
drivers/staging/hv/blkvsc_drv.c
View File

@ -363,10 +363,7 @@ static int blkvsc_probe(struct device *device)
blkdev->gd->queue = blk_init_queue(blkvsc_request, &blkdev->lock);
blk_queue_max_segment_size(blkdev->gd->queue, PAGE_SIZE);
blk_queue_max_phys_segments(blkdev->gd->queue,
MAX_MULTIPAGE_BUFFER_COUNT);
blk_queue_max_hw_segments(blkdev->gd->queue,
MAX_MULTIPAGE_BUFFER_COUNT);
blk_queue_max_segments(blkdev->gd->queue, MAX_MULTIPAGE_BUFFER_COUNT);
blk_queue_segment_boundary(blkdev->gd->queue, PAGE_SIZE-1);
blk_queue_bounce_limit(blkdev->gd->queue, BLK_BOUNCE_ANY);
blk_queue_dma_alignment(blkdev->gd->queue, 511);

9
fs/bio.c
View File

@ -507,10 +507,8 @@ int bio_get_nr_vecs(struct block_device *bdev)
int nr_pages;
nr_pages = ((queue_max_sectors(q) << 9) + PAGE_SIZE - 1) >> PAGE_SHIFT;
if (nr_pages > queue_max_phys_segments(q))
nr_pages = queue_max_phys_segments(q);
if (nr_pages > queue_max_hw_segments(q))
nr_pages = queue_max_hw_segments(q);
if (nr_pages > queue_max_segments(q))
nr_pages = queue_max_segments(q);
return nr_pages;
}
@ -575,8 +573,7 @@ static int __bio_add_page(struct request_queue *q, struct bio *bio, struct page
* make this too complex.
*/
while (bio->bi_phys_segments >= queue_max_phys_segments(q)
|| bio->bi_phys_segments >= queue_max_hw_segments(q)) {
while (bio->bi_phys_segments >= queue_max_segments(q)) {
if (retried_segments)
return 0;

27
include/linux/blkdev.h
View File

@ -316,8 +316,7 @@ struct queue_limits {
unsigned int discard_alignment;
unsigned short logical_block_size;
unsigned short max_hw_segments;
unsigned short max_phys_segments;
unsigned short max_segments;
unsigned char misaligned;
unsigned char discard_misaligned;
@ -929,8 +928,19 @@ static inline void blk_queue_max_sectors(struct request_queue *q, unsigned int m
blk_queue_max_hw_sectors(q, max);
}
extern void blk_queue_max_phys_segments(struct request_queue *, unsigned short);
extern void blk_queue_max_hw_segments(struct request_queue *, unsigned short);
extern void blk_queue_max_segments(struct request_queue *, unsigned short);
static inline void blk_queue_max_phys_segments(struct request_queue *q, unsigned short max)
{
blk_queue_max_segments(q, max);
}
static inline void blk_queue_max_hw_segments(struct request_queue *q, unsigned short max)
{
blk_queue_max_segments(q, max);
}
extern void blk_queue_max_segment_size(struct request_queue *, unsigned int);
extern void blk_queue_max_discard_sectors(struct request_queue *q,
unsigned int max_discard_sectors);
@ -1055,14 +1065,9 @@ static inline unsigned int queue_max_hw_sectors(struct request_queue *q)
return q->limits.max_hw_sectors;
}
static inline unsigned short queue_max_hw_segments(struct request_queue *q)
static inline unsigned short queue_max_segments(struct request_queue *q)
{
return q->limits.max_hw_segments;
}
static inline unsigned short queue_max_phys_segments(struct request_queue *q)
{
return q->limits.max_phys_segments;
return q->limits.max_segments;
}
static inline unsigned int queue_max_segment_size(struct request_queue *q)

2
include/linux/i2o.h
View File

@ -385,7 +385,7 @@
/* defines for max_sectors and max_phys_segments */
#define I2O_MAX_SECTORS 1024
#define I2O_MAX_SECTORS_LIMITED 128
#define I2O_MAX_PHYS_SEGMENTS MAX_PHYS_SEGMENTS
#define I2O_MAX_PHYS_SEGMENTS BLK_MAX_SEGMENTS
/*
* Message structures