Source of memory-failure.c - linux-imx - PHYTEC BitBucket (Stash)

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​x
 
    return ret;
}
​
static int soft_offline_in_use_page(struct page *page, int flags)
{
    int ret;
    int mt;
    struct page *hpage = compound_head(page);
​
    if (!PageHuge(page) && PageTransHuge(hpage)) {
        lock_page(hpage);
        if (!PageAnon(hpage) || unlikely(split_huge_page(hpage))) {
            unlock_page(hpage);
            if (!PageAnon(hpage))
        lock_page(page);
        if (!PageAnon(page) || unlikely(split_huge_page(page))) {
            unlock_page(page);
            if (!PageAnon(page))
                pr_info("soft offline: %#lx: non anonymous thp\n", page_to_pfn(page));
            else
                pr_info("soft offline: %#lx: thp split failed\n", page_to_pfn(page));
            put_hwpoison_page(hpage);
            put_hwpoison_page(page);
            return -EBUSY;
        }
        unlock_page(hpage);
        get_hwpoison_page(page);
        put_hwpoison_page(hpage);
        unlock_page(page);
    }
​
    /*
     * Setting MIGRATE_ISOLATE here ensures that the page will be linked
     * to free list immediately (not via pcplist) when released after
     * successful page migration. Otherwise we can't guarantee that the
     * page is really free after put_page() returns, so
     * set_hwpoison_free_buddy_page() highly likely fails.
     */
    mt = get_pageblock_migratetype(page);