mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-15 15:15:47 +00:00
8eab945c56
This patch makes the cache_cleaner workqueue deferrable, to prevent unnecessary system wake-ups, which is very important for embedded battery-powered devices. do_cache_clean() is called every 30 seconds at the moment, and often makes the system wake up from its power-save sleep state. With this change, when the workqueue uses a deferrable timer, the do_cache_clean() invocation will be delayed and combined with the closest "real" wake-up. This improves the power consumption situation. Note, I tried to create a DECLARE_DELAYED_WORK_DEFERRABLE() helper macro, similar to DECLARE_DELAYED_WORK(), but failed because of the way the timer wheel core stores the deferrable flag (it is the LSBit in the time->base pointer). My attempt to define a static variable with this bit set ended up with the "initializer element is not constant" error. Thus, I have to use run-time initialization, so I created a new cache_initialize() function which is called once when sunrpc is being initialized. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
77 lines
1.6 KiB
C
77 lines
1.6 KiB
C
/*
|
|
* linux/net/sunrpc/sunrpc_syms.c
|
|
*
|
|
* Symbols exported by the sunrpc module.
|
|
*
|
|
* Copyright (C) 1997 Olaf Kirch <okir@monad.swb.de>
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/uio.h>
|
|
#include <linux/unistd.h>
|
|
#include <linux/init.h>
|
|
|
|
#include <linux/sunrpc/sched.h>
|
|
#include <linux/sunrpc/clnt.h>
|
|
#include <linux/sunrpc/svc.h>
|
|
#include <linux/sunrpc/svcsock.h>
|
|
#include <linux/sunrpc/auth.h>
|
|
#include <linux/workqueue.h>
|
|
#include <linux/sunrpc/rpc_pipe_fs.h>
|
|
#include <linux/sunrpc/xprtsock.h>
|
|
|
|
extern struct cache_detail ip_map_cache, unix_gid_cache;
|
|
|
|
extern void cleanup_rpcb_clnt(void);
|
|
|
|
static int __init
|
|
init_sunrpc(void)
|
|
{
|
|
int err = register_rpc_pipefs();
|
|
if (err)
|
|
goto out;
|
|
err = rpc_init_mempool();
|
|
if (err) {
|
|
unregister_rpc_pipefs();
|
|
goto out;
|
|
}
|
|
#ifdef RPC_DEBUG
|
|
rpc_register_sysctl();
|
|
#endif
|
|
#ifdef CONFIG_PROC_FS
|
|
rpc_proc_init();
|
|
#endif
|
|
cache_initialize();
|
|
cache_register(&ip_map_cache);
|
|
cache_register(&unix_gid_cache);
|
|
svc_init_xprt_sock(); /* svc sock transport */
|
|
init_socket_xprt(); /* clnt sock transport */
|
|
rpcauth_init_module();
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static void __exit
|
|
cleanup_sunrpc(void)
|
|
{
|
|
cleanup_rpcb_clnt();
|
|
rpcauth_remove_module();
|
|
cleanup_socket_xprt();
|
|
svc_cleanup_xprt_sock();
|
|
unregister_rpc_pipefs();
|
|
rpc_destroy_mempool();
|
|
cache_unregister(&ip_map_cache);
|
|
cache_unregister(&unix_gid_cache);
|
|
#ifdef RPC_DEBUG
|
|
rpc_unregister_sysctl();
|
|
#endif
|
|
#ifdef CONFIG_PROC_FS
|
|
rpc_proc_exit();
|
|
#endif
|
|
rcu_barrier(); /* Wait for completion of call_rcu()'s */
|
|
}
|
|
MODULE_LICENSE("GPL");
|
|
fs_initcall(init_sunrpc); /* Ensure we're initialised before nfs */
|
|
module_exit(cleanup_sunrpc);
|