Hello Hiroshi,
I see you have added dev_dbg_ratelimited() recently, commit
6ca045930338485a8cdef117e74372aa1678009d .
However it seems to be noisy as expected similar behavior than normal
dev_dbg() without a ratelimit.
I looked ratelimit.c and there is:
printk(KERN_WARNING "%s: %d callbacks suppressed\n", func, rs->missed);
What it looks my eyes it will print those "callbacks suppressed" always
because KERN_WARNING.
On 08/15/2012 04:05 AM, Antti Palosaari wrote:
On 08/15/2012 03:44 AM, Hin-Tak Leung wrote:
--- On Wed, 15/8/12, Antti Palosaari <crope@xxxxxx> wrote:
On 08/15/2012 02:39 AM, Hin-Tak Leung
wrote:
There seems to be a small regression on
mediatree/for_v3.7-3
- dmesg/klog get flooded with these:
[201145.140260] dvb_frontend_poll: 15 callbacks
suppressed
[201145.586405] usb_urb_complete: 88 callbacks
suppressed
[201150.587308] usb_urb_complete: 3456 callbacks
suppressed
[201468.630197] usb_urb_complete: 3315 callbacks
suppressed
[201473.632978] usb_urb_complete: 3529 callbacks
suppressed
[201478.635400] usb_urb_complete: 3574 callbacks
suppressed
It seems to be every 5 seconds, but I think that's just
klog skipping repeats and collapsing duplicate entries. This
does not happen the last time I tried playing with the TV
stick :-).
That's because you has dynamic debugs enabled!
modprobe dvb_core; echo -n 'module dvb_core +p' >
/sys/kernel/debug/dynamic_debug/control
modprobe dvb_usbv2; echo -n 'module dvb_usbv2 +p' >
/sys/kernel/debug/dynamic_debug/control
If you don't add dvb_core and dvb_usbv2 modules to
/sys/kernel/debug/dynamic_debug/control you will not see
those.
I have added ratelimited version for those few debugs that
are flooded normally. This suppressed is coming from
ratelimit - it does not print all those similar debugs.
I did not enable it - it is as shipped :-).
# grep 'CONFIG_DYNAMIC' /boot/config*
/boot/config-3.4.6-2.fc17.x86_64:CONFIG_DYNAMIC_FTRACE=y
/boot/config-3.4.6-2.fc17.x86_64:CONFIG_DYNAMIC_DEBUG=y
/boot/config-3.5.0-2.fc17.x86_64:CONFIG_DYNAMIC_FTRACE=y
/boot/config-3.5.0-2.fc17.x86_64:CONFIG_DYNAMIC_DEBUG=y
/boot/config-3.5.1-1.fc17.x86_64:CONFIG_DYNAMIC_FTRACE=y
/boot/config-3.5.1-1.fc17.x86_64:CONFIG_DYNAMIC_DEBUG=y
Now I wonder why I didn't have those usb_urb_complete messages before?
The last time I played with mediatree was with 3.4.4-5.fc17.x86_64,
and with the mediatree2/dvb_core branch - and I did not have these then.
Yeah, you are correct. There is something wrong now. I see also those
ratelimited debugs even didn't ordered...
I think dev_dbg_ratelimited() is very new, there is no other users... I
have to find out whats wrong.
regards
Antti
--
http://palosaari.fi/
--
To unsubscribe from this list: send the line "unsubscribe linux-media" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
