Unverified Commit ae662eec authored Dec 10, 2018 by Alexandre Ghiti Committed by Palmer Dabbelt Jan 25, 2019

riscv: Adjust mmap base address at a third of task size



This ratio is the most used among all other architectures and make
icache_hygiene libhugetlbfs test pass: this test mmap lots of
hugepages whose addresses, without this patch, reach the end of
the process user address space.

Signed-off-by: Alexandre Ghiti <aghiti@upmem.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>

parent 28198c46

arch/riscv/include/asm/processor.h

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -22,7 +22,7 @@
	* This decides where the kernel will search for a free chunk of vm		* This decides where the kernel will search for a free chunk of vm
	* space during mmap's.		* space during mmap's.
	*/		*/
	#define TASK_UNMAPPED_BASE PAGE_ALIGN(TASK_SIZE >> 1)		#define TASK_UNMAPPED_BASE PAGE_ALIGN(TASK_SIZE / 3)

	#define STACK_TOP TASK_SIZE		#define STACK_TOP TASK_SIZE
	#define STACK_TOP_MAX STACK_TOP		#define STACK_TOP_MAX STACK_TOP

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