From: Catalin Marinas <catalin.marinas@arm.com>
To: Alexander Potapenko <glider@google.com>
Cc: will@kernel.org, pcc@google.com, andreyknvl@gmail.com,
andriy.shevchenko@linux.intel.com, aleksander.lobakin@intel.com,
linux@rasmusvillemoes.dk, yury.norov@gmail.com,
alexandru.elisei@arm.com, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, eugenis@google.com,
syednwaris@gmail.com, william.gray@linaro.org
Subject: Re: [PATCH v9 1/4] arm64: mte: implement CONFIG_ARM64_MTE_COMP
Date: Tue, 12 Dec 2023 17:16:15 +0000 [thread overview]
Message-ID: <ZXiVX5FAWZqHfr7m@arm.com> (raw)
In-Reply-To: <20231113105234.32058-2-glider@google.com>
On Mon, Nov 13, 2023 at 11:52:30AM +0100, Alexander Potapenko wrote:
> The config implements the algorithm compressing memory tags for ARM MTE
> during swapping.
>
> The algorithm is based on RLE and specifically targets buffers of tags
> corresponding to a single page. In many cases a buffer can be compressed
> into 63 bits, making it possible to store it without additional memory
> allocation.
>
> Suggested-by: Evgenii Stepanov <eugenis@google.com>
> Signed-off-by: Alexander Potapenko <glider@google.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
> +void mte_tags_to_ranges(u8 *tags, u8 *out_tags, unsigned short *out_sizes,
> + size_t *out_len)
> +{
[...]
> +}
> +EXPORT_SYMBOL_NS(mte_tags_to_ranges, MTECOMP);
I may have asked before, what the reason for EXPORT_SYMBOL_NS? Is it for
the kunit tests? Otherwise we don't expect those to be accessed from
modules.
--
Catalin
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next prev parent reply other threads:[~2023-12-12 17:16 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-13 10:52 [PATCH v9 0/4] Implement MTE tag compression for swapped pages Alexander Potapenko
2023-11-13 10:52 ` [PATCH v9 1/4] arm64: mte: implement CONFIG_ARM64_MTE_COMP Alexander Potapenko
2023-12-12 17:16 ` Catalin Marinas [this message]
2023-12-13 12:16 ` Will Deacon
2023-12-14 9:27 ` Alexander Potapenko
2023-11-13 10:52 ` [PATCH v9 2/4] arm64: mte: add a test for MTE tags compression Alexander Potapenko
2023-12-12 17:16 ` Catalin Marinas
2023-11-13 10:52 ` [PATCH v9 3/4] arm64: mte: add compression support to mteswap.c Alexander Potapenko
2023-12-12 17:17 ` Catalin Marinas
2023-11-13 10:52 ` [PATCH v9 4/4] arm64: mte: implement CONFIG_ARM64_MTE_SWAP_STATS Alexander Potapenko
2023-12-12 17:18 ` Catalin Marinas
2023-12-13 12:31 ` [PATCH v9 0/4] Implement MTE tag compression for swapped pages Will Deacon
2023-12-13 14:01 ` Alexander Potapenko
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