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Commit 92c4231a authored by Mike Miller's avatar Mike Miller Committed by Linus Torvalds
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[PATCH] cciss: set sector_size to 2048 for performance 



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: default avatarMike Miller <mike.miller@hp.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent f92e2f5f

drivers/block/cciss.c

+9 −3
Original line number Diff line number Diff line
@@ -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);

drivers/block/cciss.h

+1 −0
Original line number Diff line number Diff line
@@ -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;