diff options
Diffstat (limited to 'mm/show_mem.c')
| -rw-r--r-- | mm/show_mem.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/mm/show_mem.c b/mm/show_mem.c index 41999e94a56d..013ad4da618c 100644 --- a/mm/show_mem.c +++ b/mm/show_mem.c @@ -7,15 +7,18 @@ #include <linux/blkdev.h> #include <linux/cma.h> +#include <linux/console.h> #include <linux/cpuset.h> #include <linux/highmem.h> #include <linux/hugetlb.h> #include <linux/mm.h> #include <linux/mmzone.h> +#include <linux/seq_buf.h> #include <linux/swap.h> #include <linux/vmstat.h> #include "internal.h" +#include "slab.h" #include "swap.h" atomic_long_t _totalram_pages __read_mostly; @@ -392,10 +395,31 @@ static void show_free_areas(unsigned int filter, nodemask_t *nodemask, int max_z show_swap_cache_info(); } +static void print_string_as_lines(const char *prefix, const char *lines) +{ + if (!lines) { + printk("%s (null)\n", prefix); + return; + } + + bool locked = console_trylock(); + + while (1) { + const char *p = strchrnul(lines, '\n'); + printk("%s%.*s\n", prefix, (int) (p - lines), lines); + if (!*p) + break; + lines = p + 1; + } + if (locked) + console_unlock(); +} + void __show_mem(unsigned int filter, nodemask_t *nodemask, int max_zone_idx) { unsigned long total = 0, reserved = 0, highmem = 0; struct zone *zone; + char *buf; printk("Mem-Info:\n"); show_free_areas(filter, nodemask, max_zone_idx); @@ -447,4 +471,30 @@ void __show_mem(unsigned int filter, nodemask_t *nodemask, int max_zone_idx) } } #endif + + const unsigned buf_size = 8192; + buf = kmalloc(buf_size, GFP_ATOMIC); + if (buf) { + struct seq_buf s; + + printk("Unreclaimable slab info:\n"); + seq_buf_init(&s, buf, buf_size); + dump_unreclaimable_slab(&s); + print_string_as_lines(KERN_NOTICE, seq_buf_str(&s)); + + static unsigned long shrinkers_last_print; + + /* Ratelimit to at most once every 30 seconds */ + if (!shrinkers_last_print || + time_after(jiffies, shrinkers_last_print + HZ * 30)) { + shrinkers_last_print = jiffies; + + printk("Shrinkers:\n"); + seq_buf_init(&s, buf, buf_size); + shrinkers_to_text(&s); + print_string_as_lines(KERN_NOTICE, seq_buf_str(&s)); + } + + kfree(buf); + } } |