Re: [PATCH 17/30] mm: prefer vma_[start,end]_pgoff() to vma->vm_pgoff in kernel/

Lorenzo Stoakes <[email protected]> Fri, 10 Jul 2026 16:15:46 +0100
Newsgroups org.kernel.vger.linux-sgx,dev.linux.lists.damon,dev.linux.lists.iommu,dev.linux.lists.nvdimm,org.freedesktop.lists.dri-devel,org.kernel.vger.kvm,org.kernel.vger.linux-arm-msm,org.kernel.vger.linux-fsdevel,org.kernel.vger.linux-kernel,org.kernel.vger.linux-parisc,org.kernel.vger.linux-perf-users,org.kernel.vger.linux-tegra,org.kernel.vger.linux-trace-kernel,org.kvack.linux-mm
Message-ID <alEMciQmyQA7wdua@lucifer>
On Fri, Jul 10, 2026 at 11:09:02AM -0400, Gregory Price wrote:
> On Fri, Jul 10, 2026 at 03:56:33PM +0100, Lorenzo Stoakes wrote:
> > On Thu, Jul 09, 2026 at 11:49:18AM -0400, Gregory Price wrote:
> > >
> > > Silly question:
> >
> > There's no such thing :)
> >
>
> All my questions are silly.  That's my secret :]

Mine too ;)

>
> > >
> > >    What's the purpose of retaining tags in a non-address value?
> >
> > Well if you want to reconstitute an address from it later then that'd be the
> > intent, but I'm being hand wavey here for sure.
> >
> > Main thing is to retain stuff under the page mask
> >
>
> Right, which ...
>
> vvvvvv
> > > That sounds like there's fragility just waiting to be broken.
>
> If that's an actual issue, then our relationship with tags is painful :[

Yeah, I'm just not sure tbh.

But all that is stuf for future masochism^Wfun anyway ;) focusing on the 'respin
the monster series' fun^Wmasochism atm...

>
> ~Gregory

Cheers, Lorenzo