centos man page for rpc_malloc

RPC_MALLOC(9)							 Linux Networking						     RPC_MALLOC(9)

NAME
       rpc_malloc - allocate an RPC buffer

SYNOPSIS
       void * rpc_malloc(struct rpc_task * task, size_t size);

ARGUMENTS
       task
	   RPC task that will use this buffer

       size
	   requested byte size

DESCRIPTION
       To prevent rpciod from hanging, this allocator never sleeps, returning NULL if the request cannot be serviced immediately. The caller can
       arrange to sleep in a way that is safe for rpciod.

       Most requests are 'small' (under 2KiB) and can be serviced from a mempool, ensuring that NFS reads and writes can always proceed, and that
       there is good locality of reference for these buffers.

       In order to avoid memory starvation triggering more writebacks of NFS requests, we avoid using GFP_KERNEL.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							     RPC_MALLOC(9)