From: Cyrill Gorcunov <gorcunov@gmail.com>
To: Yang Shi <yang.shi@linux.alibaba.com>
Cc: Michal Hocko <mhocko@kernel.org>,
adobriyan@gmail.com, willy@infradead.org, mguzik@redhat.com,
akpm@linux-foundation.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: [v3 PATCH] mm: introduce arg_lock to protect arg_start|end and env_start|end in mm_struct
Date: Tue, 10 Apr 2018 23:06:51 +0300 [thread overview]
Message-ID: <20180410200651.GF2041@uranus.lan> (raw)
In-Reply-To: <e868b50d-88a3-a649-d998-b7f2bb2c40aa@linux.alibaba.com>
On Tue, Apr 10, 2018 at 12:33:35PM -0700, Yang Shi wrote:
...
>
> The race condition is just valid when protecting start_brk, brk, start_data
> and end_data with the new lock, but keep using mmap_sem in brk path.
>
> So, we should just need make a little tweak to have mmap_sem protect
> start_brk, brk, start_data and end_data, then have the new lock protect
> others so that we still can remove mmap_sem in proc as the patch is aimed to
> do.
+1. Sounds like a plan.
next prev parent reply other threads:[~2018-04-10 20:06 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-09 21:52 [v3 PATCH] mm: introduce arg_lock to protect arg_start|end and env_start|end in mm_struct Yang Shi
2018-04-10 8:48 ` Cyrill Gorcunov
2018-04-10 9:09 ` Michal Hocko
2018-04-10 9:40 ` Cyrill Gorcunov
2018-04-10 10:42 ` Michal Hocko
2018-04-10 11:02 ` Cyrill Gorcunov
2018-04-10 11:10 ` Michal Hocko
2018-04-10 12:28 ` Cyrill Gorcunov
2018-04-10 16:21 ` Yang Shi
2018-04-10 18:28 ` Yang Shi
2018-04-10 19:17 ` Cyrill Gorcunov
2018-04-10 19:33 ` Yang Shi
2018-04-10 20:06 ` Cyrill Gorcunov [this message]
2018-04-12 12:18 ` Michal Hocko
2018-04-12 16:20 ` Yang Shi
2018-04-13 6:56 ` Michal Hocko
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