pnfs/blocklayout: return layouts on setattr

This speads up truncate-heavy workloads like fsx by multiple orders of
magnitude.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/fs/nfs/blocklayout/blocklayout.c b/fs/nfs/blocklayout/blocklayout.c
index d3c3c5c972c3..bdd73fbacf48 100644
--- a/fs/nfs/blocklayout/blocklayout.c
+++ b/fs/nfs/blocklayout/blocklayout.c
@@ -799,7 +799,8 @@ static struct pnfs_layoutdriver_type blocklayout_type = {
         .id                             = LAYOUT_BLOCK_VOLUME,
         .name                           = "LAYOUT_BLOCK_VOLUME",
         .owner                          = THIS_MODULE,
-        .flags                          = PNFS_READ_WHOLE_PAGE,
+        .flags                          = PNFS_LAYOUTRET_ON_SETATTR |
+                                          PNFS_READ_WHOLE_PAGE,
         .read_pagelist                  = bl_read_pagelist,
         .write_pagelist                 = bl_write_pagelist,
         .alloc_layout_hdr               = bl_alloc_layout_hdr,