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NFS: Fix memory allocation in rpc_malloc()

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When in a low memory situation, we do want rpciod to kick off direct
reclaim in the case where that helps, however we don't want it looping
forever in mempool_alloc().
So first try allocating from the slab using GFP_KERNEL | __GFP_NORETRY,
and then fall back to a GFP_NOWAIT allocation from the mempool.

Ditto for rpc_alloc_task()

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust 2022-03-14 22:02:22 -04:00
parent d0afde5fc6
commit 33e5c765bc
2 changed files with 15 additions and 7 deletions
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1
include/linux/sunrpc/sched.h
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@ -262,6 +262,7 @@ void rpc_destroy_mempool(void);
extern struct workqueue_struct *rpciod_workqueue;
extern struct workqueue_struct *xprtiod_workqueue;
void rpc_prepare_task(struct rpc_task *task);
gfp_t rpc_task_gfp_mask(void);
static inline int rpc_wait_for_completion_task(struct rpc_task *task)
{