From: Cyrill Gorcunov <gorcunov@gmail.com>
To: "Michal Koutný" <mkoutny@suse.com>
Cc: mhocko@kernel.org, akpm@linux-foundation.org,
arunks@codeaurora.org, brgl@bgdev.pl, geert+renesas@glider.be,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
mguzik@redhat.com, rppt@linux.ibm.com, vbabka@suse.cz,
Laurent Dufour <ldufour@linux.ibm.com>
Subject: Re: [PATCH] prctl_set_mm: downgrade mmap_sem to read lock
Date: Thu, 18 Apr 2019 17:09:51 +0300 [thread overview]
Message-ID: <20190418140951.GH3040@uranus.lan> (raw)
In-Reply-To: <20190418135039.19987-1-mkoutny@suse.com>
On Thu, Apr 18, 2019 at 03:50:39PM +0200, Michal Koutný wrote:
> I learnt, it's, alas, too late to drop the non PRCTL_SET_MM_MAP calls
> [1], so at least downgrade the write acquisition of mmap_sem as in the
> patch below (that should be stacked on the previous one or squashed).
>
> Cyrill, you mentioned lock changes in [1] but the link seems empty. Is
> it supposed to be [2]? That could be an alternative to this patch after
> some refreshments and clarifications.
Yes, seems so. From a glance the patch shold be ok. Michal will review
it more carefully today. Thanks!
next prev parent reply other threads:[~2019-04-18 14:09 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-17 12:03 [PATCH] mm: get_cmdline use arg_lock instead of mmap_sem Michal Koutný
2019-04-17 13:41 ` Michal Hocko
2019-04-17 14:41 ` Michal Koutný
2019-04-17 14:55 ` Michal Hocko
2019-04-18 13:50 ` [PATCH] prctl_set_mm: downgrade mmap_sem to read lock Michal Koutný
2019-04-18 14:09 ` Cyrill Gorcunov [this message]
2019-04-18 14:15 ` Michal Hocko
2019-04-18 14:27 ` Laurent Dufour
2019-04-18 18:23 ` Cyrill Gorcunov
2019-04-30 8:18 ` [PATCH 0/3] Reduce mmap_sem usage for args manipulation Michal Koutný
2019-04-30 8:18 ` [PATCH 1/3] mm: get_cmdline use arg_lock instead of mmap_sem Michal Koutný
2019-04-30 9:09 ` Kirill Tkhai
2019-04-30 9:38 ` Cyrill Gorcunov
2019-04-30 9:53 ` Kirill Tkhai
2019-04-30 10:45 ` Cyrill Gorcunov
2019-04-30 10:56 ` Michal Koutný
2019-04-30 13:24 ` Cyrill Gorcunov
2019-04-30 8:18 ` [PATCH 2/3] prctl_set_mm: Refactor checks from validate_prctl_map Michal Koutný
2019-04-30 9:27 ` Kirill Tkhai
2019-04-30 8:18 ` [PATCH 3/3] prctl_set_mm: downgrade mmap_sem to read lock Michal Koutný
2019-04-30 8:55 ` Kirill Tkhai
2019-04-30 9:08 ` Cyrill Gorcunov
2019-04-30 9:11 ` Kirill Tkhai
2019-05-02 12:52 ` [PATCH v3 0/2] Reduce mmap_sem usage for args manipulation Michal Koutný
2019-05-02 12:52 ` [PATCH v3 1/2] prctl_set_mm: Refactor checks from validate_prctl_map Michal Koutný
2019-05-02 20:57 ` Cyrill Gorcunov
2019-05-02 12:52 ` [PATCH v3 2/2] prctl_set_mm: downgrade mmap_sem to read lock Michal Koutný
2019-05-02 20:57 ` Cyrill Gorcunov
2019-05-06 9:28 ` Kirill Tkhai
2019-05-07 17:42 ` Michal Hocko
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