From: Suren Baghdasaryan <surenb@google.com>
To: Peter Xu <peterx@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Mikulas Patocka <mpatocka@redhat.com>,
Vlastimil Babka <vbabka@suse.cz>, stable <stable@vger.kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jann Horn <jannh@google.com>, Kirill Tkhai <ktkhai@virtuozzo.com>,
Shaohua Li <shli@fb.com>, Nadav Amit <namit@vmware.com>,
Linux-MM <linux-mm@kvack.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Android Kernel Team <kernel-team@android.com>,
Andrea Arcangeli <aarcange@redhat.com>,
David Hildenbrand <david@redhat.com>,
Jason Gunthorpe <jgg@ziepe.ca>
Subject: Re: [PATCH 0/5] 4.14 backports of fixes for "CoW after fork() issue"
Date: Wed, 21 Apr 2021 16:01:48 -0700 [thread overview]
Message-ID: <CAJuCfpGa4esN0ovL1=h3h2pyt2D1YzYF4Q9Ew6Q8q08mkdn8vA@mail.gmail.com> (raw)
In-Reply-To: <CAJuCfpFfRq8TYs78BvXWriVNm4hf1+o_rX7OUGF=5Hdjcpg30g@mail.gmail.com>
On Wed, Apr 21, 2021 at 2:17 PM Suren Baghdasaryan <surenb@google.com> wrote:
>
> On Wed, Apr 21, 2021 at 2:05 PM Peter Xu <peterx@redhat.com> wrote:
> >
> > Hi, Suren,
> >
> > On Wed, Apr 21, 2021 at 01:01:34PM -0700, Suren Baghdasaryan wrote:
> > > Peter, you mentioned https://lkml.org/lkml/2020/8/10/439 patch to
> > > distinguish real writes vs enforced COW read requests, however I also
> > > see that you had a later version of this patch here:
> > > https://lore.kernel.org/patchwork/patch/1286506/. Which one should I
> > > backport? Or is it not needed in the absence of uffd-wp support in the
> > > earlier kernels?
> >
> > Sorry I have no ability to evaluate the rest... but according to Linus's
> > previous reply, my understanding is that it is not needed, not to mention it's
> > not upstreamed too.
>
> Thanks! Then I'll send the backports for 17839856fd58 alone and if
> more backports are needed I'll post followup patches.
Posted 4.19 backport: https://lore.kernel.org/patchwork/patch/1416747
and 4.14 backport: https://lore.kernel.org/patchwork/patch/1416748.
They are identical but Greg asked me to submit separate patches due to
an additional minor merge conflict in 4.14.
> Cheers,
> Suren.
>
> >
> > Thanks,
> >
> > --
> > Peter Xu
> >
> > --
> > To unsubscribe from this group and stop receiving emails from it, send an email to kernel-team+unsubscribe@android.com.
> >
next prev parent reply other threads:[~2021-04-21 23:02 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-01 18:17 [PATCH 0/5] 4.14 backports of fixes for "CoW after fork() issue" Suren Baghdasaryan
2021-04-01 18:17 ` Suren Baghdasaryan
2021-04-01 18:17 ` [PATCH 1/5] mm: reuse only-pte-mapped KSM page in do_wp_page() Suren Baghdasaryan
2021-04-01 18:17 ` Suren Baghdasaryan
2021-04-01 19:38 ` Greg KH
2021-04-01 19:47 ` Suren Baghdasaryan
2021-04-01 19:47 ` Suren Baghdasaryan
2021-04-01 18:17 ` [PATCH 2/5] mm: do_wp_page() simplification Suren Baghdasaryan
2021-04-01 18:17 ` Suren Baghdasaryan
2021-04-01 18:17 ` [PATCH 3/5] mm: fix misplaced unlock_page in do_wp_page() Suren Baghdasaryan
2021-04-01 18:17 ` Suren Baghdasaryan
2021-04-01 18:17 ` [PATCH 4/5] userfaultfd: wp: add helper for writeprotect check Suren Baghdasaryan
2021-04-01 18:17 ` Suren Baghdasaryan
2021-04-01 18:17 ` [PATCH 5/5] mm/userfaultfd: fix memory corruption due to writeprotect Suren Baghdasaryan
2021-04-01 18:17 ` Suren Baghdasaryan
2021-04-01 18:59 ` [PATCH 0/5] 4.14 backports of fixes for "CoW after fork() issue" Linus Torvalds
2021-04-01 18:59 ` Linus Torvalds
2021-04-01 19:43 ` Suren Baghdasaryan
2021-04-01 19:43 ` Suren Baghdasaryan
2021-04-01 23:47 ` Peter Xu
2021-04-02 0:12 ` Suren Baghdasaryan
2021-04-02 0:12 ` Suren Baghdasaryan
2021-04-07 13:21 ` Vlastimil Babka
2021-04-07 14:30 ` Peter Xu
2021-04-07 16:07 ` Linus Torvalds
2021-04-07 16:07 ` Linus Torvalds
2021-04-07 16:33 ` Suren Baghdasaryan
2021-04-07 16:33 ` Suren Baghdasaryan
2021-04-07 17:04 ` Linus Torvalds
2021-04-07 17:04 ` Linus Torvalds
2021-04-07 18:47 ` Mikulas Patocka
2021-04-07 19:22 ` Linus Torvalds
2021-04-07 19:22 ` Linus Torvalds
2021-04-07 21:53 ` Suren Baghdasaryan
2021-04-07 21:53 ` Suren Baghdasaryan
2021-04-21 20:01 ` Suren Baghdasaryan
2021-04-21 20:01 ` Suren Baghdasaryan
2021-04-21 21:05 ` Peter Xu
2021-04-21 21:17 ` Suren Baghdasaryan
2021-04-21 21:17 ` Suren Baghdasaryan
2021-04-21 23:01 ` Suren Baghdasaryan [this message]
2021-04-21 23:01 ` Suren Baghdasaryan
2021-04-21 22:59 ` Vlastimil Babka
2021-04-21 23:05 ` Suren Baghdasaryan
2021-04-21 23:05 ` Suren Baghdasaryan
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