msm: kgsl: Directly return page size of the supported pool (ce925b21) · Commits · e / devices / android_kernel_fairphone_FP3

In current code, if a request comes to allocate a page of a size for which pool is not supported EAGAIN is returned with a page size of PAGE_SIZE << --order. This is not efficient as it results in multiple retries in case pool of size = PAGE_SIZE << --order is also not supported. Instead of retrying with lower order page in a sequential manner this change directly returns the page size of the pool that is supported. Change-Id: Ib82ae5be7e4109fdc0a3d72bcbcd4b47cfb2e266 Signed-off-by:

Deepak Kumar <dkumar@codeaurora.org>

drivers/gpu/msm/kgsl_pool.c

+12 −1

Original line number	Diff line number	Diff line
		@@ -280,6 +280,17 @@ static int kgsl_pool_idx_lookup(unsigned int order)
		return -ENOMEM;
		}

		static int kgsl_pool_get_retry_order(unsigned int order)
		{
		int i;

		for (i = kgsl_num_pools-1; i > 0; i--)
		if (order >= kgsl_pools[i].pool_order)
		return kgsl_pools[i].pool_order;

		return 0;
		}

		/**
		* kgsl_pool_alloc_page() - Allocate a page of requested size
		* @page_size: Size of the page to be allocated
		@@ -326,7 +337,7 @@ int kgsl_pool_alloc_page(int page_size, struct page *pages,
		if (pool == NULL) {
		/* Retry with lower order pages */
		if (order > 0) {
		size = PAGE_SIZE << --order;
		size = PAGE_SIZE << kgsl_pool_get_retry_order(order);
		goto eagain;
		} else {
		/*