Re: Memory corruption with CONFIG_SWIOTLB_DYNAMIC=y

[Petr Tesařík]

On Mon, 27 Nov 2023 16:59:13 +0100
Christoph Hellwig <hch@xxxxxx> wrote:

> On Thu, Nov 23, 2023 at 11:16:08AM +0100, Petr Tesařík wrote:
> > > To sum it up, there are two types of alignment:
> > > 
> > > 1. specified by a device's min_align_mask; this says how many low
> > >    bits of a buffer's physical address must be preserved,
> > > 
> > > 2. specified by allocation size and/or the alignment parameter;
> > >    this says how many low bits in the first IO TLB slot's physical
> > >    address must be zero.  
> 
> Both are correct.

Great! Thank you for confirmation. Unfortunately, that's not quite how
the code works now.

I'm on it to fix things.

Petr T