From: Trond Myklebust trond.myklebust@hammerspace.com
commit 0d0ea309357dea0d85a82815f02157eb7fcda39f upstream.
The value of mirror->pg_bytes_written should only be updated after a successful attempt to flush out the requests on the list.
Fixes: a7d42ddb3099 ("nfs: add mirroring support to pgio layer") Signed-off-by: Trond Myklebust trond.myklebust@hammerspace.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/nfs/pagelist.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-)
--- a/fs/nfs/pagelist.c +++ b/fs/nfs/pagelist.c @@ -993,17 +993,16 @@ static void nfs_pageio_doio(struct nfs_p { struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc);
- if (!list_empty(&mirror->pg_list)) { int error = desc->pg_ops->pg_doio(desc); if (error < 0) desc->pg_error = error; - else + if (list_empty(&mirror->pg_list)) { mirror->pg_bytes_written += mirror->pg_count; - } - if (list_empty(&mirror->pg_list)) { - mirror->pg_count = 0; - mirror->pg_base = 0; + mirror->pg_count = 0; + mirror->pg_base = 0; + mirror->pg_recoalesce = 0; + } } }
@@ -1089,7 +1088,6 @@ static int nfs_do_recoalesce(struct nfs_
do { list_splice_init(&mirror->pg_list, &head); - mirror->pg_bytes_written -= mirror->pg_count; mirror->pg_count = 0; mirror->pg_base = 0; mirror->pg_recoalesce = 0;