[PATCH for review] [106/145] x86_64: remove tce_cache_blast_stress()

Andi Kleen
2006-08-10T19:58:06Z

r

From: Muli Ben-Yehuda <muli@il.ibm.com>

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: Muli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: Jon Mason <jdmason@us.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>

---
arch/x86_64/kernel/pci-calgary.c | 11 -----------
1 files changed, 11 deletions(-)

Index: linux/arch/x86_64/kernel/pci-calgary.c
===================================================================
--- linux.orig/arch/x86_64/kernel/pci-calgary.c
+++ linux/arch/x86_64/kernel/pci-calgary.c
@@ -129,11 +129,6 @@ static void tce_cache_blast(struct iommu
#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_r
#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_ta
}

__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,