From: Catalin Marinas <catalin.marinas@arm.com>
To: glider@google.com
Cc: mark.rutland@arm.com, keescook@chromium.org, will.deacon@arm.com,
linux-kernel@vger.kernel.org, akpm@linux-foundation.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] arm64: define __alloc_zeroed_user_highpage
Date: Tue, 17 Mar 2020 18:37:23 +0000 [thread overview]
Message-ID: <20200317183723.GH632169@arrakis.emea.arm.com> (raw)
In-Reply-To: <20200312155920.50067-1-glider@google.com>
On Thu, Mar 12, 2020 at 04:59:20PM +0100, glider@google.com wrote:
> When running the kernel with init_on_alloc=1, calling the default
> implementation of __alloc_zeroed_user_highpage() from include/linux/highmem.h
> leads to double-initialization of the allocated page (first by the page
> allocator, then by clear_user_page().
> Calling alloc_page_vma() with __GFP_ZERO, similarly to e.g. x86, seems
> to be enough to ensure the user page is zeroed only once.
>
> Signed-off-by: Alexander Potapenko <glider@google.com>
I queued this for 5.7. Thanks.
--
Catalin
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prev parent reply other threads:[~2020-03-17 18:37 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-12 15:59 [PATCH] arm64: define __alloc_zeroed_user_highpage glider
2020-03-12 16:49 ` Mark Rutland
2020-03-12 19:59 ` Alexander Potapenko
2020-03-13 15:03 ` Catalin Marinas
2020-03-17 18:37 ` Catalin Marinas [this message]
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