[RFC 3/3] ext4: tag asynchronous writeback io
From: Daeho Jeong <hidden>
Date: 2016-08-17 05:20:45
Also in:
linux-block, linux-mm
Subsystem:
ext4 file system, filesystems (vfs and infrastructure), the rest · Maintainers:
"Theodore Ts'o", Alexander Viro, Christian Brauner, Linus Torvalds
Set the page with PG_asyncwb and PG_plugged, and set the bio with BIO_ASYNC_WB when submitting asynchronous writeback I/O in order to mark which pages are flushed as asynchronous writeback I/O and which one stays in the plug list. Signed-off-by: Daeho Jeong <redacted> --- fs/ext4/page-io.c | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
index 2a01df9..5912e59 100644
--- a/fs/ext4/page-io.c
+++ b/fs/ext4/page-io.c@@ -370,6 +370,10 @@ static int io_submit_init_bio(struct ext4_io_submit *io, bio->bi_private = ext4_get_io_end(io->io_end); io->io_bio = bio; io->io_next_block = bh->b_blocknr; +#ifdef CONFIG_BOOST_URGENT_ASYNC_WB + if (io->io_wbc->sync_mode == WB_SYNC_NONE) + bio->bi_flags |= (1 << BIO_ASYNC_WB); +#endif return 0; }
@@ -416,6 +420,13 @@ int ext4_bio_write_page(struct ext4_io_submit *io, BUG_ON(!PageLocked(page)); BUG_ON(PageWriteback(page)); +#ifdef CONFIG_BOOST_URGENT_ASYNC_WB + if (wbc->sync_mode == WB_SYNC_NONE) { + SetPagePlugged(page); + SetPageAsyncWB(page); + } +#endif + if (keep_towrite) set_page_writeback_keepwrite(page); else
--
1.7.9.5