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 īsmallī (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.