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Message-ID: <050a01d230f2$826f0b20$874d2160$@alibaba-inc.com>
Date: Fri, 28 Oct 2016 16:08:46 +0800
From: "Hillf Danton" <hillf.zj@...baba-inc.com>
To: "'Huang, Ying'" <ying.huang@...el.com>,
"'Andrew Morton'" <akpm@...ux-foundation.org>
Cc: <tim.c.chen@...el.com>, <dave.hansen@...el.com>,
<andi.kleen@...el.com>, <aaron.lu@...el.com>, <linux-mm@...ck.org>,
<linux-kernel@...r.kernel.org>,
"'Hugh Dickins'" <hughd@...gle.com>,
"'Shaohua Li'" <shli@...nel.org>,
"'Minchan Kim'" <minchan@...nel.org>,
"'Rik van Riel'" <riel@...hat.com>,
"'Andrea Arcangeli'" <aarcange@...hat.com>,
"'Kirill A . Shutemov'" <kirill.shutemov@...ux.intel.com>
Subject: Re: [PATCH -v4 RESEND 6/9] mm, THP, swap: Support to add/delete THP to/from swap cache
On Friday, October 28, 2016 1:56 PM Huang, Ying wrote:
>
> @@ -109,9 +118,16 @@ int __add_to_swap_cache(struct page *page, swp_entry_t entry)
> * So add_to_swap_cache() doesn't returns -EEXIST.
> */
> VM_BUG_ON(error == -EEXIST);
> - set_page_private(page, 0UL);
> ClearPageSwapCache(page);
> - put_page(page);
> + set_page_private(cur_page, 0UL);
> + while (i--) {
> + cur_page--;
> + cur_entry.val--;
> + set_page_private(cur_page, 0UL);
> + radix_tree_delete(&address_space->page_tree,
> + swp_offset(cur_entry));
> + }
Pull pages out of radix tree with tree lock held?
> + page_ref_sub(page, nr);
> }
>
> return error;
>
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