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| author | Luden <luden@ghostmail.com> | 2016-02-14 00:00:13 +0100 |
|---|---|---|
| committer | Ziyan <jaraidaniel@gmail.com> | 2016-05-01 23:35:57 +0200 |
| commit | e0f3b2e128dd26d96e43317565f4a7ee90138e92 (patch) | |
| tree | 444ab4acd14e343b097be064e1a1e21cad00f9bd /mm | |
| parent | 7fd80cc6a3049e630d84d2baaae87fa1eece486c (diff) | |
| download | kernel_samsung_tuna-e0f3b2e128dd26d96e43317565f4a7ee90138e92.tar.gz kernel_samsung_tuna-e0f3b2e128dd26d96e43317565f4a7ee90138e92.tar.bz2 kernel_samsung_tuna-e0f3b2e128dd26d96e43317565f4a7ee90138e92.zip | |
Added buffers flushing for dirty pages.
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/migrate.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/mm/migrate.c b/mm/migrate.c index e598fae088c..982656e2707 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -758,6 +758,19 @@ static int move_to_new_page(struct page *newpage, struct page *page, return rc; } +static void write_dirty_buffers(struct page *page) +{ + struct buffer_head *head = page_buffers(page); + struct buffer_head *bh; + + bh = head; + do { + write_dirty_buffer(bh, WRITE_SYNC); + wait_on_buffer(bh); + bh = bh->b_this_page; + } while (bh != head); +} + static int __unmap_and_move(struct page *page, struct page *newpage, int force, bool offlining, enum migrate_mode mode) { @@ -905,6 +918,14 @@ static int __unmap_and_move(struct page *page, struct page *newpage, if (!page->mapping) { VM_BUG_ON(PageAnon(page)); if (page_has_private(page)) { + /* try_to_free_buffers() call below won't try to write + * buffers if they're dirty, so it will fail. */ + if (PageDirty(page)) { +#ifdef CONFIG_CMA_DEBUG_VERBOSE + pr_info("__unmap_and_move: flushing dirty page buffers ...\n"); +#endif + write_dirty_buffers(page); + } if (!try_to_free_buffers(page)) { #ifdef CONFIG_CMA_DEBUG_VERBOSE pr_err("__unmap_and_move: in !page_mapping/page_has_private case, mode = %d, force = %d\n", mode, force); |