From mboxrd@z Thu Jan 1 00:00:00 1970 From: amirali.shambayati@gmail.com (Amirali Shambayati) Date: Mon, 16 May 2011 22:56:34 +0430 Subject: Fwd: how to debug kernel in qemu using ubuntu image In-Reply-To: <1305561379.2944.3.camel@ubuntu.ubuntu-domain> References: <1305561379.2944.3.camel@ubuntu.ubuntu-domain> Message-ID: To: kernelnewbies@lists.kernelnewbies.org List-Id: kernelnewbies.lists.kernelnewbies.org That was helpful, thanks a lot. On Mon, May 16, 2011 at 8:26 PM, Vikram Narayanan wrote: >> Hello all, >> >> I asked my question in "linux kernel" mailing list, and I was >> suggested to forward it to this mailing list. >> >> I'm using linux-0.2.img image(which is a light linux image) to debug >> kernel using Qemu. I'm working on IO schedulers' optimization. As Qemu >> boots kernel, IO scheduler sends read requests to disk. Also by >> entering commands such as 'ls', it sends read requests. I'm looking >> for a way to send write requests. Thus I thought that using a >> benchmark which sends both read and write requests, is suitable, but >> as linux-0.2.img is a very simple and light image, it is almost >> impossible to setup heavy benchmarks on it. So I want to use an ubuntu >> image instead. But I don't know where I should see kernel printks. > kernel printk's can be seen from the dmesg output. > Just type dmesg in your shell. > You can also see that in /var/log/syslog > > Hope it helps, > Vikram > > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies at kernelnewbies.org > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > -- Amirali Shambayati Bachelor Student Computer Engineering Department Sharif University of Technology Tehran, Iran