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From: Cyrill Gorcunov <gorcunov@gmail.com>
To: "Michal Koutný" <mkoutny@suse.com>
Cc: kbuild-all@01.org, Michael Kerrisk <mtk.manpages@gmail.com>,
	Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
	Randy Dunlap <rdunlap@infradead.org>,
	kbuild test robot <lkp@intel.com>,
	Michal Hocko <mhocko@kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Yang Shi <yang.shi@linux.alibaba.com>,
	Andrew Morton <akpm@linuxfoundation.org>,
	Andrey Vagin <avagin@openvz.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Pavel Emelyanov <xemul@virtuozzo.com>
Subject: Re: [PATCH] prctl: Don't compile some of prctl functions when CRUI
Date: Wed, 17 Apr 2019 19:56:32 +0300
Message-ID: <20190417165632.GC3040@uranus.lan> (raw)
In-Reply-To: <20190417144454.GG8962@blackbody.suse.cz>

On Wed, Apr 17, 2019 at 04:44:54PM +0200, Michal Koutný wrote:
> On Wed, Apr 17, 2019 at 03:38:41PM +0300, Cyrill Gorcunov <gorcunov@gmail.com> wrote:
> > I've a bit vague memory what we've ended up with, but iirc there was
> > a problem with brk() syscall or similar. Then I think we left everything
> > as is.
> Was this related to the removal of non PR_SET_MM_MAP operations too?
> Do you have any pointers to the topic?

Here some details: suprisingly there are already users of PR_SET_MM_x
operands, so we can't deprecate it (https://lkml.org/lkml/2018/5/6/127).
And then there was an attempt to change locks https://lore.kernel.org/patchwork/patch/
but since we're modifying mm-> entries we should gurd them against
simultaneous sys_brk call. Or I misunderstood you and you meant somthing
different?

  parent reply index

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-05 18:26 [PATCH v2] prctl: Deprecate non PR_SET_MM_MAP operations Cyrill Gorcunov
2018-04-05 18:56 ` Michal Hocko
2018-04-05 19:51   ` Cyrill Gorcunov
2018-04-05 18:59 ` Yang Shi
2018-04-18 22:28 ` Andrew Morton
2018-04-18 22:42   ` Cyrill Gorcunov
2018-04-20  2:38 ` [v2] " Sergey Senozhatsky
2018-04-20  7:02   ` Cyrill Gorcunov
2018-04-20  7:29     ` Sergey Senozhatsky
2018-04-20  8:18       ` Cyrill Gorcunov
2018-04-20 20:37       ` [PATCH] prctl: Don't compile some of prctl functions when CRUI kbuild test robot
2018-04-20 21:00         ` Andrew Morton
2019-04-17 12:23           ` Michal Koutný
2019-04-17 12:38             ` Cyrill Gorcunov
2019-04-17 14:44               ` Michal Koutný
2019-04-17 14:56                 ` Cyrill Gorcunov
2019-04-17 16:56                 ` Cyrill Gorcunov [this message]
2018-04-20 21:43       ` kbuild test robot

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