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Re: HyperSPARC patches (?)

Jurij Smakov a écrit :
On Tue, 18 Apr 2006, Ludovic Court�s wrote:

In fact, I was using 2.6.14 (with Bob Breuer's SMP patch) which does
_not_ have this lock sequence change.

Now, I tried to apply this lock sequence change to my 2.6.14 tree to see
what happens and, well, the kernel does not hang as early as before but
I'm still getting "DMA error" messages and it panics soon enough as

Where does it panic? Where you able to get a backtrace?

No, I'm not able to get a backtrace or any other log because my workstation does not respond (all physical disks are deconnected). It can do an Oops, but it prints on console a lot of SCSI error, thus I do not have the time to read the backtrace.

So far the reports on kernels with locking change reverted look like this:

Me, HyperSPARC processors, UP kernel  - DMA problems gone.
Bertrand, HyperSPARC CPUs, SMP kernel - DMA problems still present.
Bertrand, SuperSPARC CPUs, SMP kernel - DMA problems gone.
You, HyperSparc CPUs, SMP kernel      - DMA problems still present.

From this data set it appears that DMA problems is some combination of the locking patch and SMP patch on HyperSPARCs only. It would be really useful if you could try running HyperSPARC with UP kernel and locking change reverted, that would at least make it clear that locking change is responsible for at least a part of the problem.

I can try. Can you give me a tarball of the same kernel you test ? Thus, we are sure that we test the same kernel.



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