From: Jann Horn <jannh@google.com>
To: Andrew Morton <akpm@linux-foundation.org>, Linux-MM <linux-mm@kvack.org>
Cc: kernel list <linux-kernel@vger.kernel.org>,
"Eric W . Biederman" <ebiederm@xmission.com>,
Michel Lespinasse <walken@google.com>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Sakari Ailus <sakari.ailus@linux.intel.com>
Subject: Re: [PATCH 1/4] mm/gup_benchmark: Take the mmap lock around GUP
Date: Wed, 30 Sep 2020 03:35:14 +0200 [thread overview]
Message-ID: <CAG48ez1b7_tSyFndMOefGECog4Dde5XmRHCtWen9=CdJkho+HA@mail.gmail.com> (raw)
In-Reply-To: <CAG48ez3SG6ngZLtasxJ6LABpOnqCz5-QHqb0B4k44TQ8F9n6+w@mail.gmail.com>
On Wed, Sep 30, 2020 at 3:19 AM Jann Horn <jannh@google.com> wrote:
> To be safe against concurrent changes to the VMA tree, we must take the
> mmap lock around GUP operations (excluding the GUP-fast family of
> operations, which will take the mmap lock by themselves if necessary).
(Sorry, my mail setup messed up the In-Reply-To headers, so you may
not see the patches threaded properly... let me know if you want me to
resend.)
next prev parent reply other threads:[~2020-09-30 1:35 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-30 1:19 [PATCH 1/4] mm/gup_benchmark: Take the mmap lock around GUP Jann Horn
2020-09-30 1:35 ` Jann Horn [this message]
2020-09-30 12:20 ` Jason Gunthorpe
2020-09-30 21:15 ` John Hubbard
2020-09-30 23:21 ` Michel Lespinasse
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