diff options
| author | Alexandre Ghiti <aghiti@upmem.com> | 2018-12-10 06:21:46 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-03-13 14:04:02 -0700 |
| commit | bf981e9b8ab7caaf782a548527923edf3a25fc03 (patch) | |
| tree | f5f6488bd262ef871cb17b76e5b1b75bd7c3ccb4 /arch | |
| parent | c5e5e6c6c55c8f2ebfb3c37d1987c998f5b19990 (diff) | |
riscv: Adjust mmap base address at a third of task size
[ Upstream commit ae662eec8a515ab550524e04c793b5ddf1aae3a1 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/riscv/include/asm/processor.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/riscv/include/asm/processor.h b/arch/riscv/include/asm/processor.h index 0531f49af5c3..ce70bceb8872 100644 --- a/arch/riscv/include/asm/processor.h +++ b/arch/riscv/include/asm/processor.h @@ -22,7 +22,7 @@ * This decides where the kernel will search for a free chunk of vm * 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_MAX STACK_TOP |