From: Peng Tao <tao.peng@xxxxxxx>
We don't have the real IO size information in buffer read, but for direct
read, we can get it from dreq->bytes_left. Let's make use of it.
Signed-off-by: Peng Tao <tao.peng@xxxxxxx>
---
fs/nfs/pnfs.c | 8 +++++++-
1 files changed, 7 insertions(+), 1 deletions(-)
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index e61a373..e4cfd1e 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -1154,16 +1154,22 @@ out_forget_reply:
void
pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req)
{
+ u64 rd_size = req->wb_bytes;
+
BUG_ON(pgio->pg_lseg != NULL);
if (req->wb_offset != req->wb_pgbase) {
nfs_pageio_reset_read_mds(pgio);
return;
}
+
+ if (pgio->pg_dreq != NULL)
+ rd_size = nfs_dreq_bytes_left(pgio->pg_dreq);
+
pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
req->wb_context,
req_offset(req),
- req->wb_bytes,
+ rd_size,
IOMODE_READ,
GFP_KERNEL);
/* If no lseg, fall back to read through mds */
--
1.7.1.262.g5ef3d
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