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From: Alexey Dobriyan <adobriyan@gmail.com>
To: mikpelinux.gmail.com@avx2.kvack.org
Cc: linux-kernel@vger.kernel.org, mhocko@kernel.org,
	willy@infradead.org, ak@linux.intel.com, linux-mm@kvack.org
Subject: Re: [PATCH] mm: disable `vm.max_map_count' sysctl limit
Date: Mon, 27 Nov 2017 22:46:03 +0300	[thread overview]
Message-ID: <20171127194603.GA28115@avx2> (raw)

> vm.max_map_count

I always thought it is some kind of algorithmic complexity limiter and
kernel memory limiter. VMAs are under SLAB_ACCOUNT nowadays but ->mmap
list stays:

	$ chgrep -e 'for.*vma = vma->vm_next' | wc -l
	41

In particular readdir on /proc/*/map_files .

I'm saying you can not simply remove this sysctl.

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WARNING: multiple messages have this Message-ID (diff)
From: Alexey Dobriyan <adobriyan@gmail.com>
To: mikpelinux.gmail.com@avx2
Cc: linux-kernel@vger.kernel.org, mhocko@kernel.org,
	willy@infradead.org, ak@linux.intel.com, linux-mm@kvack.org
Subject: Re: [PATCH] mm: disable `vm.max_map_count' sysctl limit
Date: Mon, 27 Nov 2017 22:46:03 +0300	[thread overview]
Message-ID: <20171127194603.GA28115@avx2> (raw)

> vm.max_map_count

I always thought it is some kind of algorithmic complexity limiter and
kernel memory limiter. VMAs are under SLAB_ACCOUNT nowadays but ->mmap
list stays:

	$ chgrep -e 'for.*vma = vma->vm_next' | wc -l
	41

In particular readdir on /proc/*/map_files .

I'm saying you can not simply remove this sysctl.

             reply	other threads:[~2017-11-27 19:46 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-11-27 19:46 Alexey Dobriyan [this message]
2017-11-27 19:46 ` [PATCH] mm: disable `vm.max_map_count' sysctl limit Alexey Dobriyan
2017-11-27 19:47 ` Alexey Dobriyan
2017-11-27 19:47   ` Alexey Dobriyan
  -- strict thread matches above, loose matches on Subject: below --
2017-11-26 16:09 Mikael Pettersson
2017-11-26 16:09 ` Mikael Pettersson
2017-11-26 16:09 ` Mikael Pettersson
2017-11-27 10:12 ` Michal Hocko
2017-11-27 10:12   ` Michal Hocko
2017-11-27 16:22   ` Matthew Wilcox
2017-11-27 16:22     ` Matthew Wilcox
     [not found]     ` <20171127162207.GA8265-PfSpb0PWhxZc2C7mugBRk2EX/6BAtgUQ@public.gmane.org>
2017-11-27 19:28       ` Mikael Pettersson
2017-11-27 19:28         ` Mikael Pettersson
2017-11-27 19:28         ` Mikael Pettersson
2017-11-27 17:25   ` Andi Kleen
2017-11-27 17:25     ` Andi Kleen
     [not found]     ` <87vahv8whv.fsf-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2017-11-27 18:32       ` Michal Hocko
2017-11-27 18:32         ` Michal Hocko
2017-11-27 18:32         ` Michal Hocko
2017-11-27 19:57         ` Michal Hocko
2017-11-27 19:57           ` Michal Hocko
     [not found]           ` <20171127195732.3hkfx57d3ytyccvp-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2017-11-27 20:21             ` Andi Kleen
2017-11-27 20:21               ` Andi Kleen
2017-11-27 20:21               ` Andi Kleen
2017-11-27 20:52               ` Michal Hocko
2017-11-27 20:52                 ` Michal Hocko
2017-11-27 19:36     ` Mikael Pettersson
2017-11-27 19:36       ` Mikael Pettersson
     [not found]   ` <20171127101232.ykriowhatecnvjvg-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2017-11-27 19:18     ` Mikael Pettersson
2017-11-27 19:18       ` Mikael Pettersson
2017-11-27 19:18       ` Mikael Pettersson
     [not found]       ` <CAM43=SPVvBTPz31Uu=iz3fpS9tb75uSmL=pYP3AfsfmYr9u4Og-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-11-27 19:52         ` Michal Hocko
2017-11-27 19:52           ` Michal Hocko
2017-11-27 19:52           ` Michal Hocko
     [not found]           ` <20171127195207.vderbbkbgygawuhx-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2017-11-27 23:26             ` John Hubbard
2017-11-27 23:26               ` John Hubbard
2017-11-27 23:26               ` John Hubbard
2017-11-27 23:26               ` John Hubbard
2017-11-28  8:12               ` Michal Hocko
2017-11-28  8:12                 ` Michal Hocko
2017-11-29  5:14                 ` John Hubbard
2017-11-29  5:14                   ` John Hubbard
2017-11-29  5:14                   ` John Hubbard
     [not found]                   ` <5ca7d54b-5ae4-646d-f3a0-9b85129c9ccf-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2017-11-29  8:32                     ` Michal Hocko
2017-11-29  8:32                       ` Michal Hocko
2017-11-29  8:32                       ` Michal Hocko

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