From: Andrey Ryabinin <aryabinin@virtuozzo.com>
To: Pavel Tatashin <pasha.tatashin@oracle.com>,
will.deacon@arm.com, mhocko@kernel.org,
akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org,
x86@kernel.org, kasan-dev@googlegroups.com,
borntraeger@de.ibm.com, heiko.carstens@de.ibm.com,
willy@infradead.org, ard.biesheuvel@linaro.org,
mark.rutland@arm.com, catalin.marinas@arm.com, sam@ravnborg.org,
mgorman@techsingularity.net, steven.sistare@oracle.com,
daniel.m.jordan@oracle.com, bob.picco@oracle.com
Subject: Re: [PATCH v2 2/2] arm64/mm/kasan: don't use vmemmap_populate() to initialize shadow
Date: Tue, 7 Nov 2017 19:24:38 +0300 [thread overview]
Message-ID: <a1f63638-7edd-a498-d89f-67dea59a247a@virtuozzo.com> (raw)
In-Reply-To: <20171106183516.6644-3-pasha.tatashin@oracle.com>
On 11/06/2017 09:35 PM, Pavel Tatashin wrote:
> From: Will Deacon <will.deacon@arm.com>
>
> The kasan shadow is currently mapped using vmemmap_populate() since that
> provides a semi-convenient way to map pages into init_top_pgt. However,
> since that no longer zeroes the mapped pages, it is not suitable for kasan,
> which requires zeroed shadow memory.
>
> Add kasan_populate_shadow() interface and use it instead of
> vmemmap_populate(). Besides, this allows us to take advantage of gigantic
> pages and use them to populate the shadow, which should save us some memory
> wasted on page tables and reduce TLB pressure.
>
> Signed-off-by: Will Deacon <will.deacon@arm.com>
> Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com>
> ---
Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
--
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>
prev parent reply other threads:[~2017-11-07 16:21 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-06 18:35 [PATCH v2 0/2] " Pavel Tatashin
2017-11-06 18:35 ` [PATCH v2 1/2] x86/mm/kasan: " Pavel Tatashin
2017-11-06 18:35 ` [PATCH v2 2/2] arm64/mm/kasan: " Pavel Tatashin
2017-11-07 16:24 ` Andrey Ryabinin [this message]
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=a1f63638-7edd-a498-d89f-67dea59a247a@virtuozzo.com \
--to=aryabinin@virtuozzo.com \
--cc=akpm@linux-foundation.org \
--cc=ard.biesheuvel@linaro.org \
--cc=bob.picco@oracle.com \
--cc=borntraeger@de.ibm.com \
--cc=catalin.marinas@arm.com \
--cc=daniel.m.jordan@oracle.com \
--cc=heiko.carstens@de.ibm.com \
--cc=kasan-dev@googlegroups.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mark.rutland@arm.com \
--cc=mgorman@techsingularity.net \
--cc=mhocko@kernel.org \
--cc=pasha.tatashin@oracle.com \
--cc=sam@ravnborg.org \
--cc=steven.sistare@oracle.com \
--cc=will.deacon@arm.com \
--cc=willy@infradead.org \
--cc=x86@kernel.org \
/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