Not mounting rootfs

Hi folks,

I trying to boot a kernel with a rootfs generated with buildroot under qemu but with any success, the output is:

[    0.814014]   Magic number: 6:562:333
[    0.814522] tty tty54: hash matches
[    0.815121] rtc_cmos 00:00: setting system clock to 2014-03-11 14:19:08 UTC (1394547548)
[    0.820886] List of all partitions:
[    0.821097] No filesystem could mount root, tried:
[    0.821399] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[    0.821877] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.14.0-rc5-ARCH-00265-gb01d4e6 #1
[    0.822184] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    0.822550]  ffffffffffffffff ffff880007107df8 ffffffff814f7bc4 ffffffff816e5af0
[    0.822903]  ffff880007107e70 ffffffff814f4749 ffffffff00000010 ffff880007107e80
[    0.823216]  ffff880007107e20 ffff880007107e28 ffff880007107e90 0000000000000012
[    0.823421] Call Trace:

That is the way I'm invoking qemu:

qemu-system-x86_64 -boot c -m 128 -nographic -kernel ./path/to/bzImage -hda ./buildroot-2013.05/output/images/rootfs.ext2 -append "root=/dev/ram0 console=ttyS0 init=/sbin/init"

Any tip is extremely welcome :)

---
Flavio Ceolin

tip 1: What would you expect to see here that isn't here? That's right, an output of what partitions it found.

-hda ./buildroot-2013.05/output/images/rootfs.ext2

seems to have misfired.

Either that, or '-append "root=/dev/ram0' and ram0 doesn't point at a root file system. You might want to decide whether ram0 or ext2 is where you want taht root to be....

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