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Subject[RFC v3 2/3] mm: make optimistic check for swapin readahead
On Tue, Jul 14, 2015 at 12:07:27AM +0300, Kirill A. Shutemov wrote:
> On Mon, Jul 13, 2015 at 11:28:03PM +0300, Ebru Akagunduz wrote:
> > diff --git a/mm/huge_memory.c b/mm/huge_memory.c
> > index 595edd9..b4cef9d 100644
> > --- a/mm/huge_memory.c
> > +++ b/mm/huge_memory.c
> > @@ -24,6 +24,7 @@
> > #include <linux/migrate.h>
> > #include <linux/hashtable.h>
> > #include <linux/userfaultfd_k.h>
> > +#include <linux/swapops.h>
> >
> > #include <asm/tlb.h>
> > #include <asm/pgalloc.h>
> > @@ -2671,11 +2672,11 @@ static int khugepaged_scan_pmd(struct mm_struct *mm,
> > {
> > pmd_t *pmd;
> > pte_t *pte, *_pte;
> > - int ret = 0, none_or_zero = 0;
> > + int ret = 0, none_or_zero = 0, unmapped = 0;
> > struct page *page = NULL;
> > unsigned long _address;
> > spinlock_t *ptl;
> > - int node = NUMA_NO_NODE;
> > + int node = NUMA_NO_NODE, max_ptes_swap = HPAGE_PMD_NR/8;
>
> So, you've decide to ignore knob request for max_ptes_swap.
> Why?
I did not know sysfs knob at your first comment in v2
I thought you meant something else, so did not request
for sysfs knob. I will add it to commit message in v4.

kind regards,
Ebru


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