AcoSail/kernel_optimize_test
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[PATCH] cciss: set sector_size to 2048 for performance

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Change the blk_queue_max_sectors from 512 to 2048.  This helps increase
performance.

[akpm@osdl.org: s/sector_size/max_sectors/]
Signed-off-by: Mike Miller <mike.miller@hp.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Mike Miller 2006-12-06 20:35:06 -08:00 committed by Linus Torvalds
parent f92e2f5f88
commit 92c4231aef
2 changed files with 10 additions and 3 deletions
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12
drivers/block/cciss.c
View File

@ -269,6 +269,7 @@ static int cciss_proc_get_info(char *buffer, char **start, off_t offset,
"Firmware Version: %c%c%c%c\n"
"IRQ: %d\n"
"Logical drives: %d\n"
"Max sectors: %d\n"
"Current Q depth: %d\n"
"Current # commands on controller: %d\n"
"Max Q depth since init: %d\n"
@ -279,7 +280,9 @@ static int cciss_proc_get_info(char *buffer, char **start, off_t offset,
(unsigned long)h->board_id,
h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT],
h->num_luns, h->Qdepth, h->commands_outstanding,
h->num_luns,
h->cciss_max_sectors,
h->Qdepth, h->commands_outstanding,
h->maxQsinceinit, h->max_outstanding, h->maxSG);
pos += size;
@ -1395,7 +1398,7 @@ static void cciss_update_drive_info(int ctlr, int drv_index)
/* This is a limit in the driver and could be eliminated. */
blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES);
blk_queue_max_sectors(disk->queue, 512);
blk_queue_max_sectors(disk->queue, h->cciss_max_sectors);
blk_queue_softirq_done(disk->queue, cciss_softirq_done);
@ -3347,6 +3350,9 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
cciss_procinit(i);
hba[i]->cciss_max_sectors = 2048;
hba[i]->busy_initializing = 0;
for (j = 0; j < NWD; j++) { /* mfm */
@ -3371,7 +3377,7 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
/* This is a limit in the driver and could be eliminated. */
blk_queue_max_phys_segments(q, MAXSGENTRIES);
blk_queue_max_sectors(q, 512);
blk_queue_max_sectors(q, hba[i]->cciss_max_sectors);
blk_queue_softirq_done(q, cciss_softirq_done);

1
drivers/block/cciss.h
View File

@ -77,6 +77,7 @@ struct ctlr_info
unsigned int intr[4];
unsigned int msix_vector;
unsigned int msi_vector;
int cciss_max_sectors;
BYTE cciss_read;
BYTE cciss_write;
BYTE cciss_read_capacity;