When a GC entry gets added to the LRU, kick off SYNC_NONE writeback
so that we can be ready to close it when the time comes. This should
help minimize delays when freeing objects reaped from the LRU.
Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
---
fs/nfsd/filecache.c | 23 +++++++++++++++++++++--
1 file changed, 21 insertions(+), 2 deletions(-)
diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c
index 47cdc6129a7b..c43b6cff03e2 100644
--- a/fs/nfsd/filecache.c
+++ b/fs/nfsd/filecache.c
@@ -325,6 +325,20 @@ nfsd_file_fsync(struct nfsd_file *nf)
nfsd_reset_write_verifier(net_generic(nf->nf_net, nfsd_net_id));
}
+static void
+nfsd_file_flush(struct nfsd_file *nf)
+{
+ struct file *file = nf->nf_file;
+ struct address_space *mapping;
+
+ if (!file || !(file->f_mode & FMODE_WRITE))
+ return;
+
+ mapping = file->f_mapping;
+ if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY))
+ filemap_flush(mapping);
+}
+
static int
nfsd_file_check_write_error(struct nfsd_file *nf)
{
@@ -484,9 +498,14 @@ nfsd_file_put(struct nfsd_file *nf)
/* Try to add it to the LRU. If that fails, decrement. */
if (nfsd_file_lru_add(nf)) {
- /* If it's still hashed, we're done */
- if (test_bit(NFSD_FILE_HASHED, &nf->nf_flags))
+ /*
+ * If it's still hashed, we can just return now,
+ * after kicking off SYNC_NONE writeback.
+ */
+ if (test_bit(NFSD_FILE_HASHED, &nf->nf_flags)) {
+ nfsd_file_flush(nf);
return;
+ }
/*
* We're racing with unhashing, so try to remove it from
--
2.37.3
