Re: [PATCH v3 31/35] lib: add memory allocations report in show_mem()

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Mon 12-02-24 13:39:17, Suren Baghdasaryan wrote:
[...]
> @@ -423,4 +424,18 @@ void __show_mem(unsigned int filter, nodemask_t *nodemask, int max_zone_idx)
>  #ifdef CONFIG_MEMORY_FAILURE
>  	printk("%lu pages hwpoisoned\n", atomic_long_read(&num_poisoned_pages));
>  #endif
> +#ifdef CONFIG_MEM_ALLOC_PROFILING
> +	{
> +		struct seq_buf s;
> +		char *buf = kmalloc(4096, GFP_ATOMIC);
> +
> +		if (buf) {
> +			printk("Memory allocations:\n");
> +			seq_buf_init(&s, buf, 4096);
> +			alloc_tags_show_mem_report(&s);
> +			printk("%s", buf);
> +			kfree(buf);
> +		}
> +	}
> +#endif

I am pretty sure I have already objected to this. Memory allocations in
the oom path are simply no go unless there is absolutely no other way
around that. In this case the buffer could be preallocated.

-- 
Michal Hocko
SUSE Labs




[Index of Archives]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [Big List of Linux Books]

  Powered by Linux