From: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Jarkko Sakkinen <jarkko@kernel.org>,
Dave Hansen <dave.hansen@linux.intel.com>,
Thomas Gleixner <tglx@kernel.org>, Ingo Molnar <mingo@redhat.com>,
Borislav Petkov <bp@alien8.de>,
x86@kernel.org, "H . Peter Anvin" <hpa@zytor.com>,
Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Dan Williams <dan.j.williams@intel.com>,
Vishal Verma <vishal.l.verma@intel.com>,
Dave Jiang <dave.jiang@intel.com>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <mripard@kernel.org>,
Thomas Zimmermann <tzimmermann@suse.de>,
David Airlie <airlied@gmail.com>, Simona Vetter <simona@ffwll.ch>,
Jani Nikula <jani.nikula@linux.intel.com>,
Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
Rodrigo Vivi <rodrigo.vivi@intel.com>,
Tvrtko Ursulin <tursulin@ursulin.net>,
Christian Koenig <christian.koenig@amd.com>,
Huang Rui <ray.huang@amd.com>,
Matthew Auld <matthew.auld@intel.com>,
Matthew Brost <matthew.brost@intel.com>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Christian Brauner <brauner@kernel.org>, Jan Kara <jack@suse.cz>,
Benjamin LaHaise <bcrl@kvack.org>, Gao Xiang <xiang@kernel.org>,
Chao Yu <chao@kernel.org>, Yue Hu <zbestahu@gmail.com>,
Jeffle Xu <jefflexu@linux.alibaba.com>,
Sandeep Dhavale <dhavale@google.com>,
Hongbo Li <lihongbo22@huawei.com>,
Chunhai Guo <guochunhai@vivo.com>, Theodore Ts'o <tytso@mit.edu>,
Andreas Dilger <adilger.kernel@dilger.ca>,
Muchun Song <muchun.song@linux.dev>,
Oscar Salvador <osalvador@suse.de>,
David Hildenbrand <david@kernel.org>,
Konstantin Komarov <almaz.alexandrovich@paragon-software.com>,
Mike Marshall <hubcap@omnibond.com>,
Martin Brandenburg <martin@omnibond.com>,
Tony Luck <tony.luck@intel.com>,
Reinette Chatre <reinette.chatre@intel.com>,
Dave Martin <Dave.Martin@arm.com>,
James Morse <james.morse@arm.com>,
Babu Moger <babu.moger@amd.com>, Carlos Maiolino <cem@kernel.org>,
Damien Le Moal <dlemoal@kernel.org>,
Naohiro Aota <naohiro.aota@wdc.com>,
Johannes Thumshirn <jth@kernel.org>,
Matthew Wilcox <willy@infradead.org>,
"Liam R . Howlett" <Liam.Howlett@oracle.com>,
Vlastimil Babka <vbabka@suse.cz>, Mike Rapoport <rppt@kernel.org>,
Suren Baghdasaryan <surenb@google.com>,
Michal Hocko <mhocko@suse.com>, Hugh Dickins <hughd@google.com>,
Baolin Wang <baolin.wang@linux.alibaba.com>,
Zi Yan <ziy@nvidia.com>, Nico Pache <npache@redhat.com>,
Ryan Roberts <ryan.roberts@arm.com>, Dev Jain <dev.jain@arm.com>,
Barry Song <baohua@kernel.org>, Lance Yang <lance.yang@linux.dev>,
Jann Horn <jannh@google.com>, Pedro Falcato <pfalcato@suse.de>,
David Howells <dhowells@redhat.com>,
Paul Moore <paul@paul-moore.com>,
James Morris <jmorris@namei.org>,
"Serge E . Hallyn" <serge@hallyn.com>,
Yury Norov <yury.norov@gmail.com>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
linux-sgx@vger.kernel.org, linux-kernel@vger.kernel.org,
nvdimm@lists.linux.dev, linux-cxl@vger.kernel.org,
dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org,
linux-fsdevel@vger.kernel.org, linux-aio@kvack.org,
linux-erofs@lists.ozlabs.org, linux-ext4@vger.kernel.org,
linux-mm@kvack.org, ntfs3@lists.linux.dev,
devel@lists.orangefs.org, linux-xfs@vger.kernel.org,
keyrings@vger.kernel.org, linux-security-module@vger.kernel.org,
Jason Gunthorpe <jgg@nvidia.com>
Subject: Re: [PATCH 00/12] mm: add bitmap VMA flag helpers and convert all mmap_prepare to use them
Date: Mon, 19 Jan 2026 19:42:32 +0000 [thread overview]
Message-ID: <e7b0dfa2-51c7-469b-a6f2-78b505c0f139@lucifer.local> (raw)
In-Reply-To: <20260119113302.76b21eb8be2f9d0bb076446d@linux-foundation.org>
On Mon, Jan 19, 2026 at 11:33:02AM -0800, Andrew Morton wrote:
> On Mon, 19 Jan 2026 14:48:51 +0000 Lorenzo Stoakes <lorenzo.stoakes@oracle.com> wrote:
>
> > We introduced the bitmap VMA type vma_flags_t in the aptly named commit
> > 9ea35a25d51b ("mm: introduce VMA flags bitmap type") in order to permit
> > future growth in VMA flags and to prevent the asinine requirement that VMA
> > flags be available to 64-bit kernels only if they happened to use a bit
> > number about 32-bits.
> >
> > This is a long-term project as there are very many users of VMA flags
> > within the kernel that need to be updated in order to utilise this new
> > type.
>
> Thanks, let's give this a run in mm-new for a few days, see if that
> helps shake anything out. I didn't add [11/12] due to a significant
> merge clash, but it compiles!
I mean I'm not sure what testing is running in mm-new anyway other than
David's private bot, but that patch is key to the series, albeit thankfully
only affecting VMA userland tests.
However unfortunately _nobody_ is running VMA userlands tests except me
locally (we did ask, more than once kernelci people but it seems they are
too busy), so I guess we may as well leave there FWIW I guess.
If the change that conflicts is in mm-unstable by tomorrow I can rebase and
respin.
I can't base on mm-new as the criteria for inclusion are extremely
confusing right now and everything there is untested so it's like playing
whack-a-mole a bit. Hopefully your forthcoming documentation will sort that
out (and hopefully it aligns with what the community would like).
Anyway I don't have expectation that this series will be taken this cycle,
rather it's for:
- Review
- Testing
- To get the painful merge issues dealt with ahead of time
As a result it'd be good to get into mm-unstable sooner rather than later
though since that's what's for linux-next I guess during merge window?
Though it becomes a little unclear what the tree state is then so not sure.
The intent with patch 11/12 re: vma userland test changes is to make it
MUCH easier to maintain and to avoid this kind of thing in future. So
short-term pain for long-term gain.
Thanks, Lorenzo.
next prev parent reply other threads:[~2026-01-19 19:43 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-19 14:48 Lorenzo Stoakes
2026-01-19 14:48 ` [PATCH 01/12] mm: rename vma_flag_test/set_atomic() to vma_test/set_atomic_flag() Lorenzo Stoakes
2026-01-19 14:48 ` [PATCH 02/12] mm: add mk_vma_flags() bitmap flag macro helper Lorenzo Stoakes
2026-01-19 14:48 ` [PATCH 03/12] tools: bitmap: add missing bitmap_[subset(), andnot()] Lorenzo Stoakes
2026-01-19 14:48 ` [PATCH 04/12] mm: add basic VMA flag operation helper functions Lorenzo Stoakes
2026-01-19 14:48 ` [PATCH 05/12] mm: update hugetlbfs to use VMA flags on mmap_prepare Lorenzo Stoakes
2026-01-19 14:48 ` [PATCH 06/12] mm: update secretmem " Lorenzo Stoakes
2026-01-19 14:48 ` [PATCH 07/12] mm: update shmem_[kernel]_file_*() functions to use vma_flags_t Lorenzo Stoakes
2026-01-19 14:48 ` [PATCH 08/12] mm: update all remaining mmap_prepare users " Lorenzo Stoakes
2026-01-19 14:49 ` [PATCH 09/12] mm: make vm_area_desc utilise vma_flags_t only Lorenzo Stoakes
2026-01-19 14:49 ` [PATCH 10/12] tools/testing/vma: separate VMA userland tests into separate files Lorenzo Stoakes
2026-01-19 14:49 ` [PATCH 11/12] tools/testing/vma: separate out vma_internal.h into logical headers Lorenzo Stoakes
2026-01-19 14:49 ` [PATCH 12/12] tools/testing/vma: add VMA userland tests for VMA flag functions Lorenzo Stoakes
2026-01-19 19:33 ` [PATCH 00/12] mm: add bitmap VMA flag helpers and convert all mmap_prepare to use them Andrew Morton
2026-01-19 19:42 ` Lorenzo Stoakes [this message]
2026-01-19 21:18 ` Lorenzo Stoakes
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=e7b0dfa2-51c7-469b-a6f2-78b505c0f139@lucifer.local \
--to=lorenzo.stoakes@oracle.com \
--cc=Dave.Martin@arm.com \
--cc=Liam.Howlett@oracle.com \
--cc=adilger.kernel@dilger.ca \
--cc=airlied@gmail.com \
--cc=akpm@linux-foundation.org \
--cc=almaz.alexandrovich@paragon-software.com \
--cc=arnd@arndb.de \
--cc=babu.moger@amd.com \
--cc=baohua@kernel.org \
--cc=baolin.wang@linux.alibaba.com \
--cc=bcrl@kvack.org \
--cc=bp@alien8.de \
--cc=brauner@kernel.org \
--cc=cem@kernel.org \
--cc=chao@kernel.org \
--cc=christian.koenig@amd.com \
--cc=dan.j.williams@intel.com \
--cc=dave.hansen@linux.intel.com \
--cc=dave.jiang@intel.com \
--cc=david@kernel.org \
--cc=dev.jain@arm.com \
--cc=devel@lists.orangefs.org \
--cc=dhavale@google.com \
--cc=dhowells@redhat.com \
--cc=dlemoal@kernel.org \
--cc=dri-devel@lists.freedesktop.org \
--cc=gregkh@linuxfoundation.org \
--cc=guochunhai@vivo.com \
--cc=hpa@zytor.com \
--cc=hubcap@omnibond.com \
--cc=hughd@google.com \
--cc=intel-gfx@lists.freedesktop.org \
--cc=jack@suse.cz \
--cc=james.morse@arm.com \
--cc=jani.nikula@linux.intel.com \
--cc=jannh@google.com \
--cc=jarkko@kernel.org \
--cc=jefflexu@linux.alibaba.com \
--cc=jgg@nvidia.com \
--cc=jmorris@namei.org \
--cc=joonas.lahtinen@linux.intel.com \
--cc=jth@kernel.org \
--cc=keyrings@vger.kernel.org \
--cc=lance.yang@linux.dev \
--cc=lihongbo22@huawei.com \
--cc=linux-aio@kvack.org \
--cc=linux-cxl@vger.kernel.org \
--cc=linux-erofs@lists.ozlabs.org \
--cc=linux-ext4@vger.kernel.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux-security-module@vger.kernel.org \
--cc=linux-sgx@vger.kernel.org \
--cc=linux-xfs@vger.kernel.org \
--cc=linux@rasmusvillemoes.dk \
--cc=maarten.lankhorst@linux.intel.com \
--cc=martin@omnibond.com \
--cc=matthew.auld@intel.com \
--cc=matthew.brost@intel.com \
--cc=mhocko@suse.com \
--cc=mingo@redhat.com \
--cc=mripard@kernel.org \
--cc=muchun.song@linux.dev \
--cc=naohiro.aota@wdc.com \
--cc=npache@redhat.com \
--cc=ntfs3@lists.linux.dev \
--cc=nvdimm@lists.linux.dev \
--cc=osalvador@suse.de \
--cc=paul@paul-moore.com \
--cc=pfalcato@suse.de \
--cc=ray.huang@amd.com \
--cc=reinette.chatre@intel.com \
--cc=rodrigo.vivi@intel.com \
--cc=rppt@kernel.org \
--cc=ryan.roberts@arm.com \
--cc=serge@hallyn.com \
--cc=simona@ffwll.ch \
--cc=surenb@google.com \
--cc=tglx@kernel.org \
--cc=tony.luck@intel.com \
--cc=tursulin@ursulin.net \
--cc=tytso@mit.edu \
--cc=tzimmermann@suse.de \
--cc=vbabka@suse.cz \
--cc=viro@zeniv.linux.org.uk \
--cc=vishal.l.verma@intel.com \
--cc=willy@infradead.org \
--cc=x86@kernel.org \
--cc=xiang@kernel.org \
--cc=yury.norov@gmail.com \
--cc=zbestahu@gmail.com \
--cc=ziy@nvidia.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox