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authorPeng Tao <bergwolf@gmail.com>2012-08-24 00:27:48 +0800
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-10-01 15:37:34 -0700
commit7acdb026818455638543b04b68d4a580c367fba8 (patch)
treea765a5fe13553aad3fc1aeb8c4e8685242654bde /fs/nfs
parent6f2ea7f2a3ff3cd342bface43f8b4bf5e431cf36 (diff)
NFSv41: fix DIO write_io calculation
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 Signed-off-by: Peng Tao <tao.peng@emc.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/direct.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 22130df1621..253d397780b 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -467,10 +467,10 @@ 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:
@@ -818,6 +818,7 @@ 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);
@@ -829,7 +830,6 @@ 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