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Commit 4ccf4ae3 authored by Muli Ben-Yehuda's avatar Muli Ben-Yehuda Committed by Andi Kleen
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[PATCH] remove tce_cache_blast_stress() 



tce_cache_blast_stress was useful during bringup to stress the IOMMU's
cache flushing. Now that we quiesce DMAs on every cache flush, using
_stress() brings the machine down to its knees once you put it under
load. Remove this debug / bringup code that isn't useful anymore
completely.

Signed-off-by: default avatarMuli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: default avatarJon Mason <jdmason@us.ibm.com>
Signed-off-by: default avatarAndi Kleen <ak@suse.de>
parent 796e4390

arch/x86_64/kernel/pci-calgary.c

+0 −11
Original line number Diff line number Diff line
@@ -129,11 +129,6 @@ static void tce_cache_blast(struct iommu_table *tbl); 
#ifdef CONFIG_IOMMU_DEBUG

int debugging __read_mostly = 1;



static inline void tce_cache_blast_stress(struct iommu_table *tbl)

{

	tce_cache_blast(tbl);

}



static inline unsigned long verify_bit_range(unsigned long* bitmap,

	int expected, unsigned long start, unsigned long end)

{
@@ -153,10 +148,6 @@ static inline unsigned long verify_bit_range(unsigned long* bitmap, 
#else /* debugging is disabled */

int debugging __read_mostly = 0;



static inline void tce_cache_blast_stress(struct iommu_table *tbl)

{

}



static inline unsigned long verify_bit_range(unsigned long* bitmap,

	int expected, unsigned long start, unsigned long end)

{
@@ -289,8 +280,6 @@ static void __iommu_free(struct iommu_table *tbl, dma_addr_t dma_addr, 
	}



	__clear_bit_string(tbl->it_map, entry, npages);



	tce_cache_blast_stress(tbl);

}



static void iommu_free(struct iommu_table *tbl, dma_addr_t dma_addr,