nfs42: serialize LAYOUTSTATS calls of the same file

There is no need to report concurrently.

Reviewed-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c
index ee02483..06c74cd 100644 (file)
--- a/fs/nfs/nfs42proc.c
+++ b/fs/nfs/nfs42proc.c
@@ -204,6 +204,9 @@ nfs42_layoutstat_release(void *calldata)
                nfss->pnfs_curr_ld->cleanup_layoutstats(data);
 
        pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout);
+       smp_mb__before_atomic();
+       clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags);
+       smp_mb__after_atomic();
        nfs_iput_and_deactive(data->inode);
        kfree(data->args.devinfo);
        kfree(data);

diff --cc fs/nfs/pnfs.c
Simple merge

diff --cc include/linux/nfs_fs.h
Simple merge