Pileus Git - ~andy/linux/blob - drivers/staging/zcache/debug.c

   1 #include <linux/atomic.h>
   2 #include "debug.h"
   3
   4 #ifdef CONFIG_ZCACHE_DEBUG
   5 #include <linux/debugfs.h>
   6
   7 ssize_t zcache_obj_count;
   8 ssize_t zcache_obj_count_max;
   9 ssize_t zcache_objnode_count;
  10 ssize_t zcache_objnode_count_max;
  11 u64 zcache_eph_zbytes;
  12 u64 zcache_eph_zbytes_max;
  13 u64 zcache_pers_zbytes_max;
  14 ssize_t zcache_eph_pageframes_max;
  15 ssize_t zcache_pers_pageframes_max;
  16 ssize_t zcache_pageframes_alloced;
  17 ssize_t zcache_pageframes_freed;
  18 ssize_t zcache_eph_zpages;
  19 ssize_t zcache_eph_zpages_max;
  20 ssize_t zcache_pers_zpages_max;
  21 ssize_t zcache_flush_total;
  22 ssize_t zcache_flush_found;
  23 ssize_t zcache_flobj_total;
  24 ssize_t zcache_flobj_found;
  25 ssize_t zcache_failed_eph_puts;
  26 ssize_t zcache_failed_pers_puts;
  27 ssize_t zcache_failed_getfreepages;
  28 ssize_t zcache_failed_alloc;
  29 ssize_t zcache_put_to_flush;
  30 ssize_t zcache_compress_poor;
  31 ssize_t zcache_mean_compress_poor;
  32 ssize_t zcache_eph_ate_tail;
  33 ssize_t zcache_eph_ate_tail_failed;
  34 ssize_t zcache_pers_ate_eph;
  35 ssize_t zcache_pers_ate_eph_failed;
  36 ssize_t zcache_evicted_eph_zpages;
  37 ssize_t zcache_evicted_eph_pageframes;
  38 ssize_t zcache_zero_filled_pages;
  39 ssize_t zcache_zero_filled_pages_max;
  40
  41 #define ATTR(x)  { .name = #x, .val = &zcache_##x, }
  42 static struct debug_entry {
  43         const char *name;
  44         ssize_t *val;
  45 } attrs[] = {
  46         ATTR(obj_count), ATTR(obj_count_max),
  47         ATTR(objnode_count), ATTR(objnode_count_max),
  48         ATTR(flush_total), ATTR(flush_found),
  49         ATTR(flobj_total), ATTR(flobj_found),
  50         ATTR(failed_eph_puts), ATTR(failed_pers_puts),
  51         ATTR(failed_getfreepages), ATTR(failed_alloc),
  52         ATTR(put_to_flush),
  53         ATTR(compress_poor), ATTR(mean_compress_poor),
  54         ATTR(eph_ate_tail), ATTR(eph_ate_tail_failed),
  55         ATTR(pers_ate_eph), ATTR(pers_ate_eph_failed),
  56         ATTR(evicted_eph_zpages), ATTR(evicted_eph_pageframes),
  57         ATTR(eph_pageframes), ATTR(eph_pageframes_max),
  58         ATTR(pers_pageframes), ATTR(pers_pageframes_max),
  59         ATTR(eph_zpages), ATTR(eph_zpages_max),
  60         ATTR(pers_zpages), ATTR(pers_zpages_max),
  61         ATTR(last_active_file_pageframes),
  62         ATTR(last_inactive_file_pageframes),
  63         ATTR(last_active_anon_pageframes),
  64         ATTR(last_inactive_anon_pageframes),
  65         ATTR(eph_nonactive_puts_ignored),
  66         ATTR(pers_nonactive_puts_ignored),
  67         ATTR(zero_filled_pages),
  68 #ifdef CONFIG_ZCACHE_WRITEBACK
  69         ATTR(outstanding_writeback_pages),
  70         ATTR(writtenback_pages),
  71 #endif
  72 };
  73 #undef ATTR
  74 int zcache_debugfs_init(void)
  75 {
  76         unsigned int i;
  77         struct dentry *root = debugfs_create_dir("zcache", NULL);
  78         if (root == NULL)
  79                 return -ENXIO;
  80
  81         for (i = 0; i < ARRAY_SIZE(attrs); i++)
  82                 if (!debugfs_create_size_t(attrs[i].name, S_IRUGO, root, attrs[i].val))
  83                         goto out;
  84
  85         debugfs_create_u64("eph_zbytes", S_IRUGO, root, &zcache_eph_zbytes);
  86         debugfs_create_u64("eph_zbytes_max", S_IRUGO, root, &zcache_eph_zbytes_max);
  87         debugfs_create_u64("pers_zbytes", S_IRUGO, root, &zcache_pers_zbytes);
  88         debugfs_create_u64("pers_zbytes_max", S_IRUGO, root, &zcache_pers_zbytes_max);
  89
  90         return 0;
  91 out:
  92         return -ENODEV;
  93 }
  94
  95 /* developers can call this in case of ooms, e.g. to find memory leaks */
  96 void zcache_dump(void)
  97 {
  98         unsigned int i;
  99         for (i = 0; i < ARRAY_SIZE(attrs); i++)
 100                 pr_debug("zcache: %s=%zu\n", attrs[i].name, *attrs[i].val);
 101
 102         pr_debug("zcache: eph_zbytes=%llu\n", (unsigned long long)zcache_eph_zbytes);
 103         pr_debug("zcache: eph_zbytes_max=%llu\n", (unsigned long long)zcache_eph_zbytes_max);
 104         pr_debug("zcache: pers_zbytes=%llu\n", (unsigned long long)zcache_pers_zbytes);
 105         pr_debug("zcache: pers_zbytes_max=%llu\n", (unsigned long long)zcache_pers_zbytes_max);
 106 }
 107 #endif