From: Suren Baghdasaryan <surenb@google.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: akpm@linux-foundation.org, jannh@google.com, willy@infradead.org,
liam.howlett@oracle.com, david@redhat.com, peterx@redhat.com,
ldufour@linux.ibm.com, vbabka@suse.cz, michel@lespinasse.org,
jglisse@google.com, mhocko@suse.com, hannes@cmpxchg.org,
dave@stgolabs.net, hughd@google.com,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
stable@vger.kernel.org
Subject: Re: [PATCH v2 4/6] mm: lock vma explicitly before doing vm_flags_reset and vm_flags_reset_once
Date: Wed, 2 Aug 2023 13:21:31 -0700 [thread overview]
Message-ID: <CAJuCfpHG+fR5YZ74QmUXQcAKcDWaTNMB4gzddZPKdjBr0=s9dQ@mail.gmail.com> (raw)
In-Reply-To: <CAHk-=wjxQpxK_vOpdcCycR2FGrSHLHZk+GVuVHrAv-8X3=XzUQ@mail.gmail.com>
On Wed, Aug 2, 2023 at 11:54 AM Linus Torvalds
<torvalds@linux-foundation.org> wrote:
>
> On Wed, 2 Aug 2023 at 11:09, Suren Baghdasaryan <surenb@google.com> wrote:
> >
> > Ok, IOW the vma would be already locked before mmap() is called...
>
> Yup.
>
> > Just to confirm, you are suggesting to remove vma_start_write() call
> > from hfi1_file_mmap() and let vm_flags_reset() generate an assertion
> > if it's ever called with an unlocked vma, correct?
>
> Correct.
Got it. Will update in the next version. Thanks!
>
> Linus
>
next prev parent reply other threads:[~2023-08-02 20:21 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-01 22:07 [PATCH v2 0/6] make vma locking more obvious Suren Baghdasaryan
2023-08-01 22:07 ` [PATCH v2 1/6] mm: enable page walking API to lock vmas during the walk Suren Baghdasaryan
2023-08-01 22:07 ` [PATCH v2 2/6] mm: for !CONFIG_PER_VMA_LOCK equate write lock assertion for vma and mmap Suren Baghdasaryan
2023-08-02 17:07 ` Liam R. Howlett
2023-08-01 22:07 ` [PATCH v2 3/6] mm: replace mmap with vma write lock assertions when operating on a vma Suren Baghdasaryan
2023-08-02 17:13 ` Liam R. Howlett
2023-08-01 22:07 ` [PATCH v2 4/6] mm: lock vma explicitly before doing vm_flags_reset and vm_flags_reset_once Suren Baghdasaryan
2023-08-02 17:13 ` Liam R. Howlett
2023-08-02 17:49 ` Linus Torvalds
2023-08-02 18:09 ` Suren Baghdasaryan
2023-08-02 18:53 ` Linus Torvalds
2023-08-02 20:21 ` Suren Baghdasaryan [this message]
2023-08-01 22:07 ` [PATCH v2 5/6] mm: always lock new vma before inserting into vma tree Suren Baghdasaryan
2023-08-02 17:02 ` Liam R. Howlett
2023-08-01 22:07 ` [PATCH v2 6/6] mm: move vma locking out of vma_prepare Suren Baghdasaryan
2023-08-02 16:59 ` Liam R. Howlett
2023-08-02 17:24 ` Suren Baghdasaryan
2023-08-03 17:28 ` [PATCH v2 0/6] make vma locking more obvious Suren Baghdasaryan
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='CAJuCfpHG+fR5YZ74QmUXQcAKcDWaTNMB4gzddZPKdjBr0=s9dQ@mail.gmail.com' \
--to=surenb@google.com \
--cc=akpm@linux-foundation.org \
--cc=dave@stgolabs.net \
--cc=david@redhat.com \
--cc=hannes@cmpxchg.org \
--cc=hughd@google.com \
--cc=jannh@google.com \
--cc=jglisse@google.com \
--cc=ldufour@linux.ibm.com \
--cc=liam.howlett@oracle.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mhocko@suse.com \
--cc=michel@lespinasse.org \
--cc=peterx@redhat.com \
--cc=stable@vger.kernel.org \
--cc=torvalds@linux-foundation.org \
--cc=vbabka@suse.cz \
--cc=willy@infradead.org \
/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