Re: ia64 port needs help in order to be saved

On 8/5/20 4:05 PM, Frank Scheiner wrote:
> I think this is due to:
> 
> ```
> rx2800-i2 /usr/src/linux-on-ramdisk # git bisect good
> 543cea9accd9804307541cb93d3ed7ec94b07237 is the first bad commit
> commit 543cea9accd9804307541cb93d3ed7ec94b07237
> Author: Christoph Hellwig <[email protected]>
> Date:   Sun Dec 24 15:10:07 2017 +0100
> 
>     ia64: use generic swiotlb_ops
> 
>     These are identical to the ia64 ops, and would also support CMA
>     if enabled on ia64.
> 
>     Signed-off-by: Christoph Hellwig <[email protected]>
>     Acked-by: Christian König <[email protected]>
> 
> :040000 040000 5fe9ea16dd24746410a88e8e57d5722eabf99650
> 3cdc996c27f5b5f1cb626dcfe246146e09cb804c M      arch
> ```
> 
> The bisecting happened between 4.15.18 ([1]) - which still ran on my
> rx2800 i2 - and 4.16-rc1 ([2]) - which crashes it during OS bootup.

Yeah, I'm aware that your bisect showed that this was the offending
commit, but you might have ended up at the wrong commit since we
were unable to fix it back then.

> Maybe you try to apply Chrisoph Hellwig's patch from [3] (whole thread
> on [4])? If it works then, it could to be related.
> 
> [3]: https://marc.info/?l=linux-ia64&m=156145878523498&w=2
> 
> [4]: https://marc.info/?l=linux-ia64&m=156144480821712&w=2

I can do that, yes. Let me see.

Adrian