Re: [PATCH] x86: enable swiotlb for > 4GiG ram on 32-bit kernels

From: Ingo Molnar
Date: Sun Oct 14 2018 - 05:04:42 EST



* Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote:

> On Sun, 14 Oct 2018, Christoph Hellwig wrote:
>
> > On Sun, Oct 14, 2018 at 10:13:31AM +0200, Thomas Gleixner wrote:
> > > On Sun, 14 Oct 2018, Christoph Hellwig wrote:
> > >
> > > > We already build the swiotlb code for 32b-t kernels with PAE support,
> > > > but the code to actually use swiotlb has only been enabled for 64-bit
> > > > kernel for an unknown reason.
> > > >
> > > > Before Linux 4.18 we papers over this fact because the networking code,
> > > > the scsi layer and some random block drivers implenented their own
> > > > bounce buffering scheme.
> > > >
> > > > Fixes: 21e07dba ("scsi: reduce use of block bounce buffers")
>
> Please use the first 12 characters of the commit SHA for fixes tags in the
> future, as documented. No need to resend, I fixed it up for you and added a
> Cc: stable as well

For those who have their ~/.gitconfig's from ancient Git history, this can be done via:

git config --global core.abbrev 12

Thanks,

Ingo