From: Josh Poimboeuf <jpoimboe@redhat.com>
To: Andy Lutomirski <luto@kernel.org>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
x86@kernel.org, Borislav Petkov <bp@alien8.de>,
Nadav Amit <nadav.amit@gmail.com>,
Kees Cook <keescook@chromium.org>,
Brian Gerst <brgerst@gmail.com>,
"kernel-hardening@lists.openwall.com"
<kernel-hardening@lists.openwall.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Vladimir Davydov <vdavydov@virtuozzo.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Michal Hocko <mhocko@kernel.org>,
linux-mm@kvack.org
Subject: Re: [PATCH 04/13] mm: Track NR_KERNEL_STACK in pages instead of number of stacks
Date: Thu, 16 Jun 2016 10:33:39 -0500 [thread overview]
Message-ID: <20160616153339.xvlsnhksqmkeusn4@treble> (raw)
In-Reply-To: <24279d4009c821de64109055665429fad2a7bff7.1466036668.git.luto@kernel.org>
On Wed, Jun 15, 2016 at 05:28:26PM -0700, Andy Lutomirski wrote:
> Currently, NR_KERNEL_STACK tracks the number of kernel stacks in a
> zone. This only makes sense if each kernel stack exists entirely in
> one zone, and allowing vmapped stacks could break this assumption.
>
> It turns out that the code for tracking kernel stack allocations in
> units of pages is slightly simpler, so just switch to counting
> pages.
>
> Cc: Vladimir Davydov <vdavydov@virtuozzo.com>
> Cc: Johannes Weiner <hannes@cmpxchg.org>
> Cc: Michal Hocko <mhocko@kernel.org>
> Cc: linux-mm@kvack.org
> Signed-off-by: Andy Lutomirski <luto@kernel.org>
> ---
> fs/proc/meminfo.c | 2 +-
> kernel/fork.c | 3 ++-
> mm/page_alloc.c | 3 +--
> 3 files changed, 4 insertions(+), 4 deletions(-)
You missed another usage of NR_KERNEL_STACK in drivers/base/node.c.
--
Josh
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next prev parent reply other threads:[~2016-06-16 15:33 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1466036668.git.luto@kernel.org>
2016-06-16 0:28 ` [PATCH 01/13] x86/mm/hotplug: Don't remove PGD entries in remove_pagetable() Andy Lutomirski
2016-06-16 0:28 ` [PATCH 04/13] mm: Track NR_KERNEL_STACK in pages instead of number of stacks Andy Lutomirski
2016-06-16 11:10 ` Vladimir Davydov
2016-06-16 17:21 ` Andy Lutomirski
2016-06-16 19:20 ` Andy Lutomirski
2016-06-16 15:33 ` Josh Poimboeuf [this message]
2016-06-16 17:39 ` Andy Lutomirski
2016-06-16 19:39 ` Josh Poimboeuf
2016-06-16 0:28 ` [PATCH 05/13] mm: Move memcg stack accounting to account_kernel_stack Andy Lutomirski
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