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[SCSI] mpt2sas: Use of get_free_pages for huge memorary allocation. 

use the get_free_pages API for larger contigious physical memory chunk.
Also, the ioc->chain_depth need to be changed from
a 16bit to 32bit variable because the number of chains will exceed 64k
when the queue depth is large.

Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Kashyap, Desai 2010-03-17 16:22:52 +05:30 committed by James Bottomley
parent f891dcfdc1
commit 89009fbb7d
2 changed files with 10 additions and 7 deletions
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12
drivers/scsi/mpt2sas/mpt2sas_base.c
View File

@ -1901,7 +1901,7 @@ _base_release_memory_pools(struct MPT2SAS_ADAPTER *ioc)
ioc->config_page, ioc->config_page_dma);
}
kfree(ioc->scsi_lookup);
free_pages((ulong)ioc->scsi_lookup, ioc->scsi_lookup_pages);
kfree(ioc->hpr_lookup);
kfree(ioc->internal_lookup);
}
@ -2113,11 +2113,13 @@ _base_allocate_memory_pools(struct MPT2SAS_ADAPTER *ioc, int sleep_flag)
ioc->name, (unsigned long long) ioc->request_dma));
total_sz += sz;
ioc->scsi_lookup = kcalloc(ioc->scsiio_depth,
sizeof(struct request_tracker), GFP_KERNEL);
sz = ioc->scsiio_depth * sizeof(struct request_tracker);
ioc->scsi_lookup_pages = get_order(sz);
ioc->scsi_lookup = (struct request_tracker *)__get_free_pages(
GFP_KERNEL, ioc->scsi_lookup_pages);
if (!ioc->scsi_lookup) {
printk(MPT2SAS_ERR_FMT "scsi_lookup: kcalloc failed\n",
ioc->name);
printk(MPT2SAS_ERR_FMT "scsi_lookup: get_free_pages failed, "
"sz(%d)\n", ioc->name, (int)sz);
goto out;
}

5
drivers/scsi/mpt2sas/mpt2sas_base.h
View File

@ -676,7 +676,8 @@ struct MPT2SAS_ADAPTER {
dma_addr_t request_dma;
u32 request_dma_sz;
struct request_tracker *scsi_lookup;
spinlock_t scsi_lookup_lock;
ulong scsi_lookup_pages;
spinlock_t scsi_lookup_lock;
struct list_head free_list;
int pending_io_count;
wait_queue_head_t reset_wq;
@ -688,7 +689,7 @@ struct MPT2SAS_ADAPTER {
u16 max_sges_in_chain_message;
u16 chains_needed_per_io;
u16 chain_offset_value_for_main_message;
u16 chain_depth;
u32 chain_depth;
/* hi-priority queue */
u16 hi_priority_smid;