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[3/7] SUNRPC: Handle low memory situations in call_status()

Message ID 20220407153809.1053261-3-trondmy@kernel.org (mailing list archive)
State New, archived
Headers show
Series [1/7] NFSv4.2: Fix missing removal of SLAB_ACCOUNT on kmem_cache allocation | expand

Commit Message

Trond Myklebust April 7, 2022, 3:38 p.m. UTC 
From: Trond Myklebust <trond.myklebust@hammerspace.com>

We need to handle ENFILE, ENOBUFS, and ENOMEM, because
xprt_wake_pending_tasks() can be called with any one of these due to
socket creation failures.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
---
 net/sunrpc/clnt.c | 5 +++++
 1 file changed, 5 insertions(+)
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Patch

diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 07328f1d3885..6757b0fa5367 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -2367,6 +2367,11 @@  call_status(struct rpc_task *task)
 	case -EPIPE:
 	case -EAGAIN:
 		break;
+	case -ENFILE:
+	case -ENOBUFS:
+	case -ENOMEM:
+		rpc_delay(task, HZ>>2);
+		break;
 	case -EIO:
 		/* shutdown or soft timeout */
 		goto out_exit;