diff options
Diffstat (limited to 'drivers/pci/intel-iommu.c')
| -rw-r--r-- | drivers/pci/intel-iommu.c | 30 |
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) |