On 09/03/2015 10:51 PM, Ebru Akagunduz wrote:
> This patch introduces new sysfs integer knob
> /sys/kernel/mm/transparent_hugepage/khugepaged/max_ptes_swap
> which makes optimistic check for swapin readahead to
> increase thp collapse rate. Before getting swapped
> out pages to memory, checks them and allows up to a
> certain number. It also prints out using tracepoints
> amount of unmapped ptes.
>
> Signed-off-by: Ebru Akagunduz <[email protected]>
...
> #include <asm/pgalloc.h>
> @@ -49,7 +50,8 @@ static const char *const khugepaged_status_string[] = {
> "page_swap_cache",
> "could_not_delete_page_from_lru",
> "alloc_huge_page_fail",
> - "ccgroup_charge_fail"
> + "ccgroup_charge_fail",
> + "exceed_swap_pte"
> };
>
> enum scan_result {
> @@ -73,7 +75,8 @@ enum scan_result {
> SCAN_SWAP_CACHE_PAGE,
> SCAN_DEL_PAGE_LRU,
> SCAN_ALLOC_HUGE_PAGE_FAIL,
> - SCAN_CGROUP_CHARGE_FAIL
> + SCAN_CGROUP_CHARGE_FAIL,
> + MM_EXCEED_SWAP_PTE
This one should be renamed too.
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