Merge "mm: cma: Increase retries if less blocks available" (b95c1d30) · Commits · e / devices / android_kernel_fairphone_FP5

mm/cma.c

+12 −1

Original line number	Diff line number	Diff line
		@@ -454,6 +454,8 @@ struct page cma_alloc(struct cma cma, size_t count, unsigned int align,
		struct page *page = NULL;
		int ret = -ENOMEM;
		int retry_after_sleep = 0;
		int max_retries = 2;
		int available_regions = 0;

		if (!cma \|\| !cma->count)
		return NULL;
		@@ -480,8 +482,15 @@ struct page cma_alloc(struct cma cma, size_t count, unsigned int align,
		bitmap_maxno, start, bitmap_count, mask,
		offset);
		if (bitmap_no >= bitmap_maxno) {
		if (retry_after_sleep < 2) {
		if (retry_after_sleep < max_retries) {
		start = 0;
		/*
		* update max retries if available free regions
		* are less.
		*/
		if (available_regions < 3)
		max_retries = 5;
		available_regions = 0;
		/*
		* Page may be momentarily pinned by some other
		* process which has been scheduled out, eg.
		@@ -499,6 +508,8 @@ struct page cma_alloc(struct cma cma, size_t count, unsigned int align,
		break;
		}
		}

		available_regions++;
		bitmap_set(cma->bitmap, bitmap_no, bitmap_count);
		/*
		* It's safe to drop the lock here. We've marked this region for