Messages in this thread Patch in this message | | | From | John Garry <> | Subject | [PATCH v2 1/4] iommu/iova: Add free_all_cpu_cached_iovas() | Date | Tue, 27 Oct 2020 01:31:38 +0800 |
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Add a helper function to free the CPU rcache for all online CPUs.
There also exists a function of the same name in drivers/iommu/intel/iommu.c, but the parameters are different, and there should be no conflict.
Signed-off-by: John Garry <john.garry@huawei.com> --- drivers/iommu/iova.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/drivers/iommu/iova.c b/drivers/iommu/iova.c index 30d969a4c5fd..81b7399dd5e8 100644 --- a/drivers/iommu/iova.c +++ b/drivers/iommu/iova.c @@ -227,6 +227,14 @@ static int __alloc_and_insert_iova_range(struct iova_domain *iovad, return -ENOMEM; } +static void free_all_cpu_cached_iovas(struct iova_domain *iovad) +{ + unsigned int cpu; + + for_each_online_cpu(cpu) + free_cpu_cached_iovas(cpu, iovad); +} + static struct kmem_cache *iova_cache; static unsigned int iova_cache_users; static DEFINE_MUTEX(iova_cache_mutex); @@ -422,15 +430,12 @@ alloc_iova_fast(struct iova_domain *iovad, unsigned long size, retry: new_iova = alloc_iova(iovad, size, limit_pfn, true); if (!new_iova) { - unsigned int cpu; - if (!flush_rcache) return 0; /* Try replenishing IOVAs by flushing rcache. */ flush_rcache = false; - for_each_online_cpu(cpu) - free_cpu_cached_iovas(cpu, iovad); + free_all_cpu_cached_iovas(iovad); goto retry; } -- 2.26.2
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