#include <linux/atomic.h>#include "debug.h" #ifdef CONFIG_ZCACHE_DEBUG#include <linux/debugfs.h> ssize_t zcache_obj_count;ssize_t zcache_obj_count_max;ssize_t zcache_objnode_count;ssize_t zcache_objnode_count_max;u64 zcache_eph_zbytes;u64 zcache_eph_zbytes_max;u64 zcache_pers_zbytes_max;ssize_t zcache_eph_pageframes_max;ssize_t zcache_pers_pageframes_max;ssize_t zcache_pageframes_alloced;ssize_t zcache_pageframes_freed;ssize_t zcache_eph_zpages;ssize_t zcache_eph_zpages_max;ssize_t zcache_pers_zpages_max;ssize_t zcache_flush_total;ssize_t zcache_flush_found;ssize_t zcache_flobj_total;ssize_t zcache_flobj_found;ssize_t zcache_failed_eph_puts;ssize_t zcache_failed_pers_puts;ssize_t zcache_failed_getfreepages;ssize_t zcache_failed_alloc;ssize_t zcache_put_to_flush;ssize_t zcache_compress_poor;ssize_t zcache_mean_compress_poor;ssize_t zcache_eph_ate_tail;ssize_t zcache_eph_ate_tail_failed;ssize_t zcache_pers_ate_eph;ssize_t zcache_pers_ate_eph_failed;ssize_t zcache_evicted_eph_zpages;ssize_t zcache_evicted_eph_pageframes;ssize_t zcache_zero_filled_pages;ssize_t zcache_zero_filled_pages_max; #define ATTR(x)  { .name = #x, .val = &zcache_##x, }static struct debug_entry {	const char *name;	ssize_t *val;} attrs[] = {	ATTR(obj_count), ATTR(obj_count_max),	ATTR(objnode_count), ATTR(objnode_count_max),	ATTR(flush_total), ATTR(flush_found),	ATTR(flobj_total), ATTR(flobj_found),	ATTR(failed_eph_puts), ATTR(failed_pers_puts),	ATTR(failed_getfreepages), ATTR(failed_alloc),	ATTR(put_to_flush),	ATTR(compress_poor), ATTR(mean_compress_poor),	ATTR(eph_ate_tail), ATTR(eph_ate_tail_failed),	ATTR(pers_ate_eph), ATTR(pers_ate_eph_failed),	ATTR(evicted_eph_zpages), ATTR(evicted_eph_pageframes),	ATTR(eph_pageframes), ATTR(eph_pageframes_max),	ATTR(pers_pageframes), ATTR(pers_pageframes_max),	ATTR(eph_zpages), ATTR(eph_zpages_max),	ATTR(pers_zpages), ATTR(pers_zpages_max),	ATTR(last_active_file_pageframes),	ATTR(last_inactive_file_pageframes),	ATTR(last_active_anon_pageframes),	ATTR(last_inactive_anon_pageframes),	ATTR(eph_nonactive_puts_ignored),	ATTR(pers_nonactive_puts_ignored),	ATTR(zero_filled_pages),#ifdef CONFIG_ZCACHE_WRITEBACK	ATTR(outstanding_writeback_pages),	ATTR(writtenback_pages),#endif};#undef ATTRint zcache_debugfs_init(void){	unsigned int i;	struct dentry *root = debugfs_create_dir("zcache", NULL);	if (root == NULL)		return -ENXIO; 	for (i = 0; i < ARRAY_SIZE(attrs); i++)		if (!debugfs_create_size_t(attrs[i].name, S_IRUGO, root, attrs[i].val))			goto out; 	debugfs_create_u64("eph_zbytes", S_IRUGO, root, &zcache_eph_zbytes);	debugfs_create_u64("eph_zbytes_max", S_IRUGO, root, &zcache_eph_zbytes_max);	debugfs_create_u64("pers_zbytes", S_IRUGO, root, &zcache_pers_zbytes);	debugfs_create_u64("pers_zbytes_max", S_IRUGO, root, &zcache_pers_zbytes_max); 	return 0;out:	return -ENODEV;} /* developers can call this in case of ooms, e.g. to find memory leaks */void zcache_dump(void){	unsigned int i;	for (i = 0; i < ARRAY_SIZE(attrs); i++)		pr_debug("zcache: %s=%zu\n", attrs[i].name, *attrs[i].val); 	pr_debug("zcache: eph_zbytes=%llu\n", (unsigned long long)zcache_eph_zbytes);	pr_debug("zcache: eph_zbytes_max=%llu\n", (unsigned long long)zcache_eph_zbytes_max);	pr_debug("zcache: pers_zbytes=%llu\n", (unsigned long long)zcache_pers_zbytes);	pr_debug("zcache: pers_zbytes_max=%llu\n", (unsigned long long)zcache_pers_zbytes_max);}#endif