Server : Apache/2.4.41 (Ubuntu) System : Linux absol.cf 5.4.0-198-generic #218-Ubuntu SMP Fri Sep 27 20:18:53 UTC 2024 x86_64 User : www-data ( 33) PHP Version : 7.4.33 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare, Directory :  /usr/src/linux-headers-5.4.0-193/include/linux/

Upload File : current_dir [ Writeable ] document_root [ Writeable ]

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_SWAP_SLOTS_H
#define _LINUX_SWAP_SLOTS_H

#include <linux/swap.h>
#include <linux/spinlock.h>
#include <linux/mutex.h>

#define SWAP_SLOTS_CACHE_SIZE			SWAP_BATCH
#define THRESHOLD_ACTIVATE_SWAP_SLOTS_CACHE	(5*SWAP_SLOTS_CACHE_SIZE)
#define THRESHOLD_DEACTIVATE_SWAP_SLOTS_CACHE	(2*SWAP_SLOTS_CACHE_SIZE)

struct swap_slots_cache {
	bool		lock_initialized;
	struct mutex	alloc_lock; /* protects slots, nr, cur */
	swp_entry_t	*slots;
	int		nr;
	int		cur;
	spinlock_t	free_lock;  /* protects slots_ret, n_ret */
	swp_entry_t	*slots_ret;
	int		n_ret;
};

void disable_swap_slots_cache_lock(void);
void reenable_swap_slots_cache_unlock(void);
int enable_swap_slots_cache(void);
int free_swap_slot(swp_entry_t entry);

extern bool swap_slot_cache_enabled;

#endif /* _LINUX_SWAP_SLOTS_H */