On Mon, 2011-04-25 at 19:44 +0900, Geunsik Lim wrote:
> From: Geunsik Lim <geunsik.lim@xxxxxxxxxxx>
>
> Support kbuild menu to select memory unmap operation size
> at build time.
The subject and this line are not quite the same. The subject looks like
it only modifies the kbuild options, not mm/memory.c as well. Please
fix.
>
> Signed-off-by: Geunsik Lim <geunsik.lim@xxxxxxxxxxx>
> Acked-by: Hyunjin Choi <hj89.choi@xxxxxxxxxxx>
> ---
> init/Kconfig | 70 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> mm/memory.c | 21 +++++++++++-----
> 2 files changed, 84 insertions(+), 7 deletions(-)
>
> --- a/mm/memory.c
> +++ b/mm/memory.c
> @@ -57,6 +57,7 @@
> #include <linux/swapops.h>
> #include <linux/elf.h>
> #include <linux/gfp.h>
> +#include <linux/munmap_unit_size.h>
>
> #include <asm/io.h>
> #include <asm/pgalloc.h>
> @@ -1079,6 +1080,10 @@ static unsigned long unmap_page_range(struct mmu_gather *tlb,
> (*zap_work)--;
> continue;
> }
> +#if 0
> +printk("DEBUG:munmap step2,(%s:%d), unmap range = current(%lu) + \
> +zap_work(%lu bytes) \n", current->comm, current->pid, addr, *zap_work);
> +#endif
No #if 0 debug printing in mainline.
> next = zap_pud_range(tlb, vma, pgd, addr, next,
> zap_work, details);
> } while (pgd++, addr = next, (addr != end && *zap_work > 0));
> @@ -1088,12 +1093,10 @@ static unsigned long unmap_page_range(struct mmu_gather *tlb,
> return addr;
> }
>
> -#ifdef CONFIG_PREEMPT
> -# define ZAP_BLOCK_SIZE (8 * PAGE_SIZE)
> -#else
> -/* No preempt: go for improved straight-line efficiency */
> -# define ZAP_BLOCK_SIZE (1024 * PAGE_SIZE)
> -#endif
> +/* No preempt: go for improved straight-line efficiency
> + * on PREEMPT(preemption mode) this is not a critical latency-path.
> + */
> +# define ZAP_BLOCK_SIZE (munmap_unit_size * PAGE_SIZE)
>
> /**
> * unmap_vmas - unmap a range of memory covered by a list of vma's
> @@ -1133,7 +1136,11 @@ unsigned long unmap_vmas(struct mmu_gather **tlbp,
> spinlock_t *i_mmap_lock = details? details->i_mmap_lock: NULL;
> int fullmm = (*tlbp)->fullmm;
> struct mm_struct *mm = vma->vm_mm;
> -
> +#if 0
> +printk("DEBUG:munmap step1,(%s:%d), unit=zap_work(%ld)/ZAP_BLOCK(%ld), \
> +vma:[%8lu]=%lu-%lu \n", current->comm, current->pid, zap_work, ZAP_BLOCK_SIZE, \
> +vma->vm_end - vma->vm_start, vma->vm_end, vma->vm_start);
> +#endif
Get rid of this too.
Either have pr_debug(...) or nothing at all.
-- Steve
> mmu_notifier_invalidate_range_start(mm, start_addr, end_addr);
> for ( ; vma && vma->vm_start < end_addr; vma = vma->vm_next) {
> unsigned long end;
--
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