Re: [PATCH 12/14] vmscan: Do not writeback pages in direct reclaim

[Minchan Kim]

On Tue, Jul 6, 2010 at 9:36 AM, KOSAKI Motohiro
<kosaki.motohiro@xxxxxxxxxxxxxx> wrote:
> Hello,
>
>> Ok, that's reasonable as I'm still working on that patch. For example, the
>> patch disabled anonymous page writeback which is unnecessary as the stack
>> usage for anon writeback is less than file writeback.
>
> How do we examine swap-on-file?

bool is_swap_on_file(struct page *page)
{
    struct swap_info_struct *p;
    swp_entry_entry entry;
    entry.val = page_private(page);
    p = swap_info_get(entry);
    return !(p->flags & SWP_BLKDEV)
}

-- 
Kind regards,
Minchan Kim
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