From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: Hugh Dickins <hughd@google.com>,
Andrea Arcangeli <aarcange@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>
Cc: Dave Hansen <dave.hansen@intel.com>,
Vlastimil Babka <vbabka@suse.cz>,
Christoph Lameter <cl@gentwo.org>,
Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
Jerome Marchand <jmarchan@redhat.com>,
Yang Shi <yang.shi@linaro.org>,
Sasha Levin <sasha.levin@oracle.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: [PATCHv2 21/28] vmscan: split file huge pages before paging them out
Date: Thu, 11 Feb 2016 17:21:49 +0300 [thread overview]
Message-ID: <1455200516-132137-22-git-send-email-kirill.shutemov@linux.intel.com> (raw)
In-Reply-To: <1455200516-132137-1-git-send-email-kirill.shutemov@linux.intel.com>
This is preparation of vmscan for file huge pages. We cannot write out
huge pages, so we need to split them on the way out.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
mm/vmscan.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 18b3767136f4..ffd8df7275aa 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -468,12 +468,14 @@ void drop_slab(void)
static inline int is_page_cache_freeable(struct page *page)
{
+ int radix_tree_pins = PageTransHuge(page) ? HPAGE_PMD_NR : 1;
+
/*
* A freeable page cache page is referenced only by the caller
* that isolated the page, the page cache radix tree and
* optional buffer heads at page->private.
*/
- return page_count(page) - page_has_private(page) == 2;
+ return page_count(page) - page_has_private(page) == 1 + radix_tree_pins;
}
static int may_write_to_inode(struct inode *inode, struct scan_control *sc)
@@ -543,8 +545,6 @@ static pageout_t pageout(struct page *page, struct address_space *mapping,
* swap_backing_dev_info is bust: it doesn't reflect the
* congestion state of the swapdevs. Easy to fix, if needed.
*/
- if (!is_page_cache_freeable(page))
- return PAGE_KEEP;
if (!mapping) {
/*
* Some data journaling orphaned pages can have
@@ -1107,6 +1107,15 @@ static unsigned long shrink_page_list(struct list_head *page_list,
* starts and then write it out here.
*/
try_to_unmap_flush_dirty();
+
+ if (!is_page_cache_freeable(page))
+ goto keep_locked;
+
+ if (unlikely(PageTransHuge(page))) {
+ if (split_huge_page_to_list(page, page_list))
+ goto keep_locked;
+ }
+
switch (pageout(page, mapping, sc)) {
case PAGE_KEEP:
goto keep_locked;
--
2.7.0
next prev parent reply other threads:[~2016-02-11 14:27 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-11 14:21 [PATCHv2 00/28] huge tmpfs implementation using compound pages Kirill A. Shutemov
2016-02-11 14:21 ` [PATCHv2 01/28] thp, dax: do not try to withdraw pgtable from non-anon VMA Kirill A. Shutemov
2016-02-11 14:21 ` [PATCHv2 02/28] rmap: introduce rmap_walk_locked() Kirill A. Shutemov
2016-02-11 18:52 ` Andi Kleen
2016-02-16 9:36 ` Kirill A. Shutemov
2016-02-11 14:21 ` [PATCHv2 03/28] rmap: extend try_to_unmap() to be usable by split_huge_page() Kirill A. Shutemov
2016-02-11 14:21 ` [PATCHv2 04/28] mm: make remove_migration_ptes() beyond mm/migration.c Kirill A. Shutemov
2016-02-12 16:54 ` Dave Hansen
2016-02-16 9:54 ` Kirill A. Shutemov
2016-02-16 15:29 ` Dave Hansen
2016-02-11 14:21 ` [PATCHv2 05/28] thp: rewrite freeze_page()/unfreeze_page() with generic rmap walkers Kirill A. Shutemov
2016-02-11 14:21 ` [PATCHv2 06/28] mm: do not pass mm_struct into handle_mm_fault Kirill A. Shutemov
2016-02-11 14:21 ` [PATCHv2 07/28] mm: introduce fault_env Kirill A. Shutemov
2016-02-11 14:21 ` [PATCHv2 08/28] mm: postpone page table allocation until do_set_pte() Kirill A. Shutemov
2016-02-12 17:44 ` Dave Hansen
2016-02-16 14:26 ` Kirill A. Shutemov
2016-02-16 17:17 ` Dave Hansen
2016-02-23 13:05 ` Kirill A. Shutemov
2016-02-16 17:38 ` Dave Hansen
2016-02-23 22:58 ` Kirill A. Shutemov
2016-02-11 14:21 ` [PATCHv2 09/28] rmap: support file thp Kirill A. Shutemov
2016-02-11 14:21 ` [PATCHv2 10/28] mm: introduce do_set_pmd() Kirill A. Shutemov
2016-02-11 14:21 ` [PATCHv2 11/28] mm, rmap: account file thp pages Kirill A. Shutemov
2016-02-11 14:21 ` [PATCHv2 12/28] thp, vmstats: add counters for huge file pages Kirill A. Shutemov
2016-02-11 14:21 ` [PATCHv2 13/28] thp: support file pages in zap_huge_pmd() Kirill A. Shutemov
2016-02-12 18:33 ` Dave Hansen
2016-02-16 10:00 ` Kirill A. Shutemov
2016-02-16 15:31 ` Dave Hansen
2016-02-18 12:19 ` Kirill A. Shutemov
2016-02-11 14:21 ` [PATCHv2 14/28] thp: handle file pages in split_huge_pmd() Kirill A. Shutemov
2016-02-11 14:21 ` [PATCHv2 15/28] thp: handle file COW faults Kirill A. Shutemov
2016-02-12 18:36 ` Dave Hansen
2016-02-16 10:08 ` Kirill A. Shutemov
2016-02-11 14:21 ` [PATCHv2 16/28] thp: handle file pages in mremap() Kirill A. Shutemov
2016-02-11 14:21 ` [PATCHv2 17/28] thp: skip file huge pmd on copy_huge_pmd() Kirill A. Shutemov
2016-02-12 18:42 ` Dave Hansen
2016-02-16 10:14 ` Kirill A. Shutemov
2016-02-16 15:46 ` Dave Hansen
2016-02-18 12:41 ` Kirill A. Shutemov
2016-02-11 14:21 ` [PATCHv2 18/28] thp: prepare change_huge_pmd() for file thp Kirill A. Shutemov
2016-02-12 18:48 ` Dave Hansen
2016-02-16 10:15 ` Kirill A. Shutemov
2016-02-11 14:21 ` [PATCHv2 19/28] thp: run vma_adjust_trans_huge() outside i_mmap_rwsem Kirill A. Shutemov
2016-02-12 18:50 ` Dave Hansen
2016-02-16 10:16 ` Kirill A. Shutemov
2016-02-16 15:49 ` Dave Hansen
2016-02-11 14:21 ` [PATCHv2 20/28] thp: file pages support for split_huge_page() Kirill A. Shutemov
2016-02-11 14:21 ` Kirill A. Shutemov [this message]
2016-02-11 14:21 ` [PATCHv2 22/28] page-flags: relax policy for PG_mappedtodisk and PG_reclaim Kirill A. Shutemov
2016-02-11 14:21 ` [PATCHv2 23/28] radix-tree: implement radix_tree_maybe_preload_order() Kirill A. Shutemov
2016-02-11 14:21 ` [PATCHv2 24/28] filemap: prepare find and delete operations for huge pages Kirill A. Shutemov
2016-02-11 14:21 ` [PATCHv2 25/28] truncate: handle file thp Kirill A. Shutemov
2016-02-11 14:21 ` [PATCHv2 26/28] shmem: prepare huge=N mount option and /proc/sys/vm/shmem_huge Kirill A. Shutemov
2016-02-11 14:21 ` [PATCHv2 27/28] shmem: get_unmapped_area align huge page Kirill A. Shutemov
2016-02-11 14:21 ` [PATCHv2 28/28] shmem: add huge pages support Kirill A. Shutemov
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1455200516-132137-22-git-send-email-kirill.shutemov@linux.intel.com \
--to=kirill.shutemov@linux.intel.com \
--cc=aarcange@redhat.com \
--cc=akpm@linux-foundation.org \
--cc=cl@gentwo.org \
--cc=dave.hansen@intel.com \
--cc=hughd@google.com \
--cc=jmarchan@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=n-horiguchi@ah.jp.nec.com \
--cc=sasha.levin@oracle.com \
--cc=vbabka@suse.cz \
--cc=yang.shi@linaro.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).