Re: blktrace and dm devices?

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

 



On Thu, Oct 30 2008, Martin Peschke wrote:
> Hi,
> 
> I have noticed that I get C traces but no D traces for device mapper
> devices. Is blktrace supposed to handle dm devices as well?

The dispatch event is associated with request dispatching, which dm/md
does not do. You should get redirect events, telling you when the IO is
being redirected to the bottom device. Or split events.

-- 
Jens Axboe

--
To unsubscribe from this list: send the line "unsubscribe linux-btrace" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html

[Index of Archives]     [Netdev]     [Linux Wireless]     [Kernel Newbies]     [Security]     [Linux for Hams]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux RAID]     [Linux Admin]     [Samba]

  Powered by Linux