Re: [PATCH 2/4] mm: speed up mremap by 500x on large regions (v2)
- From
- Christoph Hellwig <hch@infradead.org>
- Date
- 2018-10-15 09:42:29
- Also in
- kvmarm, linux-alpha, linux-mips, linux-mm, linux-riscv, linux-um
- Reply to
- Joel Fernandes (Google), 2018-10-13
On Fri, Oct 12, 2018 at 06:31:58PM -0700, Joel Fernandes (Google) wrote:
Android needs to mremap large regions of memory during memory management related operations.
Just curious: why?
+ if ((old_addr & ~PMD_MASK) || (new_addr & ~PMD_MASK) + || old_end - old_addr < PMD_SIZE)
The || goes on the first line.
+ } else if (extent == PMD_SIZE && IS_ENABLED(CONFIG_HAVE_MOVE_PMD)) {Overly long line.