Paul Gortmaker wrote:

On 10-02-26 09:35 AM, Anton Vorontsov wrote:
  

quoted

On Fri, Feb 26, 2010 at 12:06:15PM +0000, Martyn Welch wrote:
    

quoted

Anton Vorontsov wrote:
      

quoted

On Thu, Feb 25, 2010 at 07:53:30PM -0500, Paul Gortmaker wrote:
[...]

        

quoted

I was able to reproduce it on an 8641D and bisected it down to this:

-----------
commit a3bc1f11e9b867a4f49505ecac486a33af248b2e
Author: Anton Vorontsov[off-list ref]
Date:   Tue Nov 10 14:11:10 2009 +0000

     gianfar: Revive SKB recycling

          

Thanks for the bisect. I have a guess why tx hangs in
SMP case. Could anyone try the patch down below?

        

Yup, no problem. I'm afraid it doesn't resolve the problem for me.
      

Hm.. I found a p2020 board and I was able to reproduce the issue.
The patch down below fixed it completely for me... hm.
    

Interesting. I just tested the patch on the sbc8641d, and it
still has the issue with your patch applied.  I'm using NFSroot
just like Martyn was and it still appears bound up on that
gianfar tx lock.  I'll see if I can get a SysRq backtrace in
case that will help you see how it manages to get there...
  

I've got a p2020ds here as well, so I'll give NFSroot on that a try with
your patch.

Martyn



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