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Groups > linux.kernel > #1186660
| From | Chao Yu <chao2.yu@samsung.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 1/3] f2fs: skip writing in ->writepages when no dirty pages exist |
| Date | 2015-07-17 12:10 +0200 |
| Message-ID | <pNaKB-2i1-3@gated-at.bofh.it> (permalink) |
| Organization | linux.* mail to news gateway |
When flushing comes from background, if there is no dirty page in the mapping of inode, we'd better to skip seeking dirty page from mapping for writebacking. Signed-off-by: Chao Yu <chao2.yu@samsung.com> --- fs/f2fs/data.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index b621c08..5370a74 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -1284,6 +1284,10 @@ static int f2fs_write_data_pages(struct address_space *mapping, if (!mapping->a_ops->writepage) return 0; + /* skip writing if there is no dirty page in this inode */ + if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE) + return 0; + if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE && get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) && available_free_memory(sbi, DIRTY_DENTS)) -- 2.4.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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[PATCH 1/3] f2fs: skip writing in ->writepages when no dirty pages exist Chao Yu <chao2.yu@samsung.com> - 2015-07-17 12:10 +0200
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