Hi Laurent,
On 12/08/2011 11:56 AM, Laurent Pinchart wrote:
> On Wednesday 07 December 2011 17:29:06 Marek Szyprowski wrote:
>> From: Andrzej Pietrasiewicz <[email protected]>
[...]
>> - printk(KERN_DEBUG "Allocated vmalloc buffer of size %ld at vaddr=%p\n",
>> - buf->size, buf->vaddr);
>> + pr_err("Allocated vmalloc buffer of size %ld at vaddr=%p\n", buf->size,
>> + buf->vaddr);
>
> Turning KERN_DEBUG into pr_err() is a bit harsh :-) In my opinion even
> KERN_DEBUG is too much here, I don't want to get messages printed to the
> kernel log every time I allocate buffers.
Indeed, pr_err looks like an overkill:) I think pr_debug() would be fine here.
>
>> return buf;
>> }
>> @@ -59,13 +63,87 @@ static void vb2_vmalloc_put(void *buf_priv)
>> struct vb2_vmalloc_buf *buf = buf_priv;
>>
>> if (atomic_dec_and_test(&buf->refcount)) {
>> - printk(KERN_DEBUG "%s: Freeing vmalloc mem at vaddr=%p\n",
>> - __func__, buf->vaddr);
>> + pr_debug("%s: Freeing vmalloc mem at vaddr=%p\n", __func__,
>> + buf->vaddr);
>
> Same here. Should we get rid of those two messages, or at least conditionally-
> compile them out of the kernel by default ?
During compilation pr_debug() will most likely be optimized away if DEBUG and
CONFIG_DYNAMIC_DEBUG isn't defined, as it is then defined as:
static inline __printf(1, 2)
int no_printk(const char *fmt, ...)
{
return 0;
}
Plus it's easy with pr_debug() to enable debug trace while dynamic printk()
is enabled in the kernel configuration.
--
Regards,
Sylwester
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