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-rw-r--r--drivers/pci/intel-iommu.c30
1 files changed, 26 insertions, 4 deletions
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index 93ed771b325..05630b44dbf 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -85,9 +85,31 @@ static struct kmem_cache *iommu_domain_cache;
static struct kmem_cache *iommu_devinfo_cache;
static struct kmem_cache *iommu_iova_cache;
+static inline void *iommu_kmem_cache_alloc(struct kmem_cache *cachep)
+{
+ unsigned int flags;
+ void *vaddr;
+
+ /* trying to avoid low memory issues */
+ flags = current->flags & PF_MEMALLOC;
+ current->flags |= PF_MEMALLOC;
+ vaddr = kmem_cache_alloc(cachep, GFP_ATOMIC);
+ current->flags &= (~PF_MEMALLOC | flags);
+ return vaddr;
+}
+
+
static inline void *alloc_pgtable_page(void)
{
- return (void *)get_zeroed_page(GFP_ATOMIC);
+ unsigned int flags;
+ void *vaddr;
+
+ /* trying to avoid low memory issues */
+ flags = current->flags & PF_MEMALLOC;
+ current->flags |= PF_MEMALLOC;
+ vaddr = (void *)get_zeroed_page(GFP_ATOMIC);
+ current->flags &= (~PF_MEMALLOC | flags);
+ return vaddr;
}
static inline void free_pgtable_page(void *vaddr)
@@ -97,7 +119,7 @@ static inline void free_pgtable_page(void *vaddr)
static inline void *alloc_domain_mem(void)
{
- return kmem_cache_alloc(iommu_domain_cache, GFP_ATOMIC);
+ return iommu_kmem_cache_alloc(iommu_domain_cache);
}
static inline void free_domain_mem(void *vaddr)
@@ -107,7 +129,7 @@ static inline void free_domain_mem(void *vaddr)
static inline void * alloc_devinfo_mem(void)
{
- return kmem_cache_alloc(iommu_devinfo_cache, GFP_ATOMIC);
+ return iommu_kmem_cache_alloc(iommu_devinfo_cache);
}
static inline void free_devinfo_mem(void *vaddr)
@@ -117,7 +139,7 @@ static inline void free_devinfo_mem(void *vaddr)
struct iova *alloc_iova_mem(void)
{
- return kmem_cache_alloc(iommu_iova_cache, GFP_ATOMIC);
+ return iommu_kmem_cache_alloc(iommu_iova_cache);
}
void free_iova_mem(struct iova *iova)