From: Vladimir Davydov <vdavydov@virtuozzo.com>
To: Andy Lutomirski <luto@kernel.org>
Cc: x86@kernel.org, linux-kernel@vger.kernel.org,
linux-arch@vger.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>,
Josh Poimboeuf <jpoimboe@redhat.com>, Jann Horn <jann@thejh.net>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Michal Hocko <mhocko@kernel.org>,
linux-mm@kvack.org
Subject: Re: [PATCH v3 04/13] mm: Track NR_KERNEL_STACK in KiB instead of number of stacks
Date: Tue, 21 Jun 2016 12:46:25 +0300 [thread overview]
Message-ID: <20160621094625.GA15970@esperanza> (raw)
In-Reply-To: <053517e55aaf7ab1bbb7424abd89a1ac5535aa64.1466466093.git.luto@kernel.org>
On Mon, Jun 20, 2016 at 04:43:34PM -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.
>
> Since frv has THREAD_SIZE < PAGE_SIZE, we need to track kernel stack
> allocations in a unit that divides both THREAD_SIZE and PAGE_SIZE on
> all architectures. Keep it simple and use KiB.
>
> 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>
Reviewed-by: Vladimir Davydov <vdavydov@virtuozzo.com>
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next prev parent reply other threads:[~2016-06-21 9:46 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1466466093.git.luto@kernel.org>
2016-06-20 23:43 ` [PATCH v3 01/13] x86/mm/hotplug: Don't remove PGD entries in remove_pagetable() Andy Lutomirski
2016-06-20 23:43 ` [PATCH v3 04/13] mm: Track NR_KERNEL_STACK in KiB instead of number of stacks Andy Lutomirski
2016-06-21 9:46 ` Vladimir Davydov [this message]
2016-06-22 7:35 ` Michal Hocko
2016-06-20 23:43 ` [PATCH v3 05/13] mm: Fix memcg stack accounting for sub-page stacks Andy Lutomirski
2016-06-21 9:54 ` Vladimir Davydov
2016-06-22 7:38 ` Michal Hocko
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