We bypass generic_file_aio_write() but would want to call block plug.
Signed-off-by: Peng Tao <tao.peng@xxxxxxx>
---
fs/nfs/direct.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index a1b81dd..a485560 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -46,6 +46,7 @@
#include <linux/kref.h>
#include <linux/slab.h>
#include <linux/task_io_accounting_ops.h>
+#include <linux/blkdev.h>
#include <linux/nfs_fs.h>
#include <linux/nfs_page.h>
@@ -922,6 +923,7 @@ ssize_t nfs_file_direct_write(struct kiocb *iocb, const struct iovec *iov,
struct file *file = iocb->ki_filp;
struct address_space *mapping = file->f_mapping;
size_t count;
+ struct blk_plug plug;
count = iov_length(iov, nr_segs);
nfs_add_stats(mapping->host, NFSIOS_DIRECTWRITTENBYTES, count);
@@ -948,7 +950,9 @@ ssize_t nfs_file_direct_write(struct kiocb *iocb, const struct iovec *iov,
task_io_account_write(count);
+ blk_start_plug(&plug);
retval = nfs_direct_write(iocb, iov, nr_segs, pos, count);
+ blk_finish_plug(&plug);
if (retval > 0) {
struct inode *inode = mapping->host;
--
1.7.1.262.g5ef3d
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