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Re: [Qemu-devel] [V9fs-developer] QEMU dies on any attempt to load a Lin
From: |
Christopher Covington |
Subject: |
Re: [Qemu-devel] [V9fs-developer] QEMU dies on any attempt to load a Linux kernel module when using a 9P rootfs |
Date: |
Fri, 22 Aug 2014 08:37:52 -0400 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130106 Thunderbird/17.0.2 |
Hi Dominique,
On 08/22/2014 02:27 AM, Dominique Martinet wrote:
> Hi,
>
> Christopher Covington wrote on Thu, Aug 21, 2014 at 03:50:58PM -0400:
>> With my 3.15.0+ kernel, qemu-system-x86_64 substituted for qemu-kvm, and the
>> path changed from your arguments I get:
>>
>> 9pnet_virtio: no channels available
>> VFS: Cannot open root device "root" or unknown-block(0,0): error -2
>> Please append a correct "root=" boot option; here are the available
>> partitions:
>> 0b00 1048575 sr0 driver: sr
>> Kernel panic - not syncing: VFS: Unable to mount root fs on
>> unknown-block(0,0)
>> Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
>> rel-1.7.5-0-ge51488c-20140602_164612-nilsson.home.kraxel.org 04/01/2014
>
> I'm pretty sure that's the same problem that's been reported a few times
> here, could you try again after cherry-picking this commit:
>
> commit f15844e0777fec936f87a87f97394f83911dacd3
> Author: Dominique Martinet <address@hidden>
> Date: Wed May 21 10:02:12 2014 +0200
>
> 9P: fix return value in v9fs_fid_xattr_set
>
> v9fs_fid_xattr_set is supposed to return 0 on success.
>
> This corrects the behaviour introduced in commit
> bdd5c28dcb8330b9074404cc92a0b83aae5606a
> "9p: fix return value in case in v9fs_fid_xattr_set()"
>
> (The function returns a negative error on error, as expected)
>
> Signed-off-by: Dominique Martinet <address@hidden>
> Signed-off-by: Eric Van Hensbergen <address@hidden>
>
>
> It has gotten in in v3.16-rc1, so your 3.15.0+ proably doesn't have it.
Thanks for the pointer to this patch. I think I started this kernel half way
through the 3.16 merge window. The last non-cherry-picked patch I have is:
commit 6d87c225f5d82d29243dc124f1ffcbb0e14ec358
Merge: 338c09a 22001f6
Author: Linus Torvalds <address@hidden>
Date: Thu Jun 12 23:06:23 2014 -0700
Merge branch 'for-linus' of
git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
So I do have the change you pointed out. Nevertheless, I'll reconfirm with the
latest torvalds/master.
Thanks,
Christopher
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