From: Jianyu Zhan <nasa4836@gmail.com>
To: Laura Abbott <labbott@fedoraproject.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Vlastimil Babka <vbabka@suse.cz>, Michal Hocko <mhocko@suse.com>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>,
kernel-hardening@lists.openwall.com,
Kees Cook <keescook@chromium.org>
Subject: Re: [RFC][PATCH 1/3] mm/debug-pagealloc.c: Split out page poisoning from debug page_alloc
Date: Tue, 26 Jan 2016 14:26:24 +0800 [thread overview]
Message-ID: <CAHz2CGXuUHYHX7KhxGjYtWrKOoxK=2Rz2N-Q0CBR9UWtrYi2Jw@mail.gmail.com> (raw)
In-Reply-To: <1453740953-18109-2-git-send-email-labbott@fedoraproject.org>
On Tue, Jan 26, 2016 at 12:55 AM, Laura Abbott
<labbott@fedoraproject.org> wrote:
> +static bool __page_poisoning_enabled __read_mostly;
> +static bool want_page_poisoning __read_mostly =
> + !IS_ENABLED(CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC);
> +
I would say this patch is nice with regard to decoupling
CONFIG_DEBUG_PAGEALLOC and CONFIG_PAGE_POISONING.
But since when we enable CONFIG_DEBUG_PAGEALLOC,
CONFIG_PAGE_POISONING will be selected.
So it would be better to make page_poison.c totally
CONFIG_DEBUG_PAGEALLOC agnostic, in case we latter have
more PAGE_POISONING users(currently only DEBUG_PAGEALLOC ). How about like this:
+static bool want_page_poisoning __read_mostly =
+ !IS_ENABLED(CONFIG_PAGE_POISONING );
Or just let it default to 'true', since we only compile this
page_poison.c when we enable CONFIG_PAGE_POISONING.
Thanks,
Jianyu Zhan
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2016-01-26 6:27 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-25 16:55 [RFC][PATCH 0/3] Sanitization of buddy pages Laura Abbott
2016-01-25 16:55 ` [RFC][PATCH 1/3] mm/debug-pagealloc.c: Split out page poisoning from debug page_alloc Laura Abbott
2016-01-26 6:26 ` Jianyu Zhan [this message]
2016-01-26 20:25 ` Laura Abbott
2016-01-25 16:55 ` [RFC][PATCH 2/3] mm/page_poison.c: Enable PAGE_POISONING as a separate option Laura Abbott
2016-01-26 6:39 ` Jianyu Zhan
2016-01-26 20:27 ` Laura Abbott
2016-01-25 16:55 ` [RFC][PATCH 3/3] mm/page_poisoning.c: Allow for zero poisoning Laura Abbott
2016-01-25 20:16 ` [kernel-hardening] " Dave Hansen
2016-01-25 22:05 ` Kees Cook
2016-01-26 1:33 ` Laura Abbott
2016-01-26 6:05 ` [RFC][PATCH 0/3] Sanitization of buddy pages Sasha Levin
2016-01-26 20:34 ` Laura Abbott
2016-01-26 9:08 ` [kernel-hardening] " Mathias Krause
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='CAHz2CGXuUHYHX7KhxGjYtWrKOoxK=2Rz2N-Q0CBR9UWtrYi2Jw@mail.gmail.com' \
--to=nasa4836@gmail.com \
--cc=akpm@linux-foundation.org \
--cc=keescook@chromium.org \
--cc=kernel-hardening@lists.openwall.com \
--cc=kirill.shutemov@linux.intel.com \
--cc=labbott@fedoraproject.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mhocko@suse.com \
--cc=vbabka@suse.cz \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox