NFS client broken in Linus' tip

At Mon, 3 Feb 2014 09:21:16 -0500,
Trond Myklebust wrote:

On Feb 3, 2014, at 4:43, Takashi Iwai [off-list ref] wrote:

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At Sun, 02 Feb 2014 17:04:38 -0500,
Trond Myklebust wrote:

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On Sun, 2014-02-02 at 12:27 +0000, Russell King - ARM Linux wrote:

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On Sat, Feb 01, 2014 at 01:03:28AM +0000, Russell King - ARM Linux wrote:

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On Fri, Jan 31, 2014 at 03:59:30PM -0500, Trond Myklebust wrote:

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On Thu, 2014-01-30 at 15:38 +0000, Russell King - ARM Linux wrote:

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On Thu, Jan 30, 2014 at 06:32:08AM -0800, Christoph Hellwig wrote:

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On Thu, Jan 30, 2014 at 02:27:52PM +0000, Russell King - ARM Linux wrote:

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Yes and no.  I still end up with an empty /etc/mtab, but the file now
exists.  However, I can create and echo data into /etc/mtab, but it seems
that can't happen at boot time.

Odd.  Can you disable CONFIG_NFSD_V3_ACL for now to isolate the issue?

Unfortunately, that results in some problem at boot time, which
ultimately ends up with the other three CPUs being stopped, and
hence the original reason scrolls off the screen before it can be
read... even at 1920p.

Hi Russell,

The following patch fixes the issue for me.

It doesn't entirely fix the issue for me, instead we've got even weirder
behaviour:

root at cubox-i4:~# ls -al test
ls: cannot access test: No such file or directory
root at cubox-i4:~# touch test
root at cubox-i4:~# ls -al test
-rw-r--r-- 1 root root 0 Feb  1 01:01 test
root at cubox-i4:~# echo foo > test
root at cubox-i4:~# ls -al test
-rw-r--r-- 1 root root 4 Feb  1 01:01 test
root at cubox-i4:~# cat test
foo
root at cubox-i4:~# rm test
root at cubox-i4:~# echo foo > test
-bash: test: Operation not supported
root at cubox-i4:~# ls -al test
-rw-r--r-- 1 root root 0 Feb  1 01:01 test

FYI, I just tested Linus' tip, and NFS is still broken.

Hi Russell,

The following patch should fix the above problem. It needs to be applied
on top of the one I sent you previously.

I've hit the same problem, and your two patches seem fixing it.
I tested them on top of 3.14-rc1.  Feel free to take my tested-by tag

 Tested-by: Takashi Iwai [off-list ref]

quoted

In addition, you will want to
apply Noah Massey's patch from
http://lkml.kernel.org/r/1391135472-9639-1-git-send-email-Noah.Massey at gmail.com 

Do I still need to test this one, too?

Hi Takashi,

Noah?s patch is not a replacement for the above 2 patches; it fixes a different problem. All three patches are therefore required for a complete solution.

OK, I'll test with Noah's patch.


thanks,

Takashi