Re: [PATCH v8 1/4] fs/proc/kcore: avoid bounce buffer for ktext data

Lorenzo Stoakes
2023-07-31T19:21:40Z

On Mon, Jul 24, 2023 at 08:23:55AM +0200, David Hildenbrand wrote:
> Hi,
>
> >
> > I met this too when I executed below command to trigger a kcore reading.
> > I wanted to do a simple testing during system running and got this.
> >
> > makedumpfile --mem-usage /proc/kcore
> >
> > Later I tried your above objdump testing, it corrupted system too.
> >
>
> What do you mean with "corrupted system too" -- did it not only fail to
> dump the system, but also actually harmed the system?
>
> @Lorenzo do you plan on reproduce + fix, or should we consider reverting
> that change?
>
> --
> Cheers,
>
> David / dhildenb
>

Apologies I mised this, I have been very busy lately not least with book :)

Concerning, I will take a look as I get a chance. I think the whole series
would have to be reverted which would be... depressing... as other patches
in series eliminates the bounce buffer altogether.