Commit 91fa7cff authored Nov 14, 2019 by Patrick Daly

mm: cma: Increase number of cma retries



Some failures have been seen where pages in a cma region are pinned
by zap_page_range. Increase the number of cma to give these pages
more time to become unpinned.

arch_local_irq_restore(inline)
free_unref_page_list()
release_pages()
free_pages_and_swap_cache()
tlb_flush_mmu_free(inline)
tlb_flush_mmu()
arch_tlb_finish_mmu(inline)
tlb_finish_mmu(inline)
zap_page_range()
__do_sys_madvise(inline)
__se_sys_madvise(inline)
__arm64_sys_madvise()
invoke_syscall(inline)
el0_svc_common()
el0_svc_handler()
el0_svc(asm).

Change-Id: Id6da587f79bf3b283e76157e2b651a0335995d73
Signed-off-by: Patrick Daly <pdaly@codeaurora.org>

parent 9e9032d1

mm/cma.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -456,7 +456,7 @@ 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 max_retries = 20;
		int available_regions = 0;

		if (!cma \|\| !cma->count)
		@@ -492,7 +492,7 @@ struct page cma_alloc(struct cma cma, size_t count, unsigned int align,
		* are less.
		*/
		if (available_regions < 3)
		max_retries = 5;
		max_retries = 25;
		available_regions = 0;
		/*
		* Page may be momentarily pinned by some other