pnfs_within_mdsthreshold() is called inside pg_init. We need
to set read_io/write_io before that. Otherwise we fail
pnfs_within_mdsthreshold() and IO goes to MDS.
A simple test case:
dd if=foo of=/mnt/pnfs/bar bs=10M count=1 oflag=direct
Cc: Andy Adamson <andros@xxxxxxxxxx>
Signed-off-by: Peng Tao <tao.peng@xxxxxxx>
---
fs/nfs/direct.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 1ba385b..34a6282 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -463,10 +463,10 @@ static ssize_t nfs_direct_read(struct kiocb *iocb, const struct iovec *iov,
if (!is_sync_kiocb(iocb))
dreq->iocb = iocb;
+ NFS_I(inode)->read_io += iov_length(iov, nr_segs);
result = nfs_direct_read_schedule_iovec(dreq, iov, nr_segs, pos, uio);
if (!result)
result = nfs_direct_wait(dreq);
- NFS_I(inode)->read_io += result;
out_release:
nfs_direct_req_release(dreq);
out:
@@ -814,6 +814,7 @@ static ssize_t nfs_direct_write_schedule_iovec(struct nfs_direct_req *dreq,
get_dreq(dreq);
atomic_inc(&inode->i_dio_count);
+ NFS_I(dreq->inode)->write_io += iov_length(iov, nr_segs);
for (seg = 0; seg < nr_segs; seg++) {
const struct iovec *vec = &iov[seg];
result = nfs_direct_write_schedule_segment(&desc, vec, pos, uio);
@@ -825,7 +826,6 @@ static ssize_t nfs_direct_write_schedule_iovec(struct nfs_direct_req *dreq,
pos += vec->iov_len;
}
nfs_pageio_complete(&desc);
- NFS_I(dreq->inode)->write_io += desc.pg_bytes_written;
/*
* If no bytes were started, return the error, and let the
--
1.7.1.262.g5ef3d
--
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