SUNRPC: Add a label for RPC calls that require allocation on receive
If the RPC call relies on the receive call allocating pages as buffers,
then let's label it so that we
a) Don't leak memory by allocating pages for requests that do not expect
this behaviour
b) Can optimise for the common case where calls do not require allocation.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
diff --git a/net/sunrpc/socklib.c b/net/sunrpc/socklib.c
index f217c34..08f00a9 100644
--- a/net/sunrpc/socklib.c
+++ b/net/sunrpc/socklib.c
@@ -104,7 +104,7 @@
/* ACL likes to be lazy in allocating pages - ACLs
* are small by default but can get huge. */
- if (unlikely(*ppage == NULL)) {
+ if ((xdr->flags & XDRBUF_SPARSE_PAGES) && *ppage == NULL) {
*ppage = alloc_page(GFP_ATOMIC);
if (unlikely(*ppage == NULL)) {
if (copied == 0)