From: Oreoluwa Babatunde <oreoluwa.babatunde@oss.qualcomm.com>
To: Sergey Senozhatsky <senozhatsky@chromium.org>,
Krzysztof Kozlowski <krzk@kernel.org>
Cc: Georgi Djakov <georgi.djakov@oss.qualcomm.com>,
andersson@kernel.org, konradybcio@kernel.org,
abelvesa@kernel.org, robh@kernel.org, krzk+dt@kernel.org,
conor+dt@kernel.org, minchan@kernel.org, axboe@kernel.dk,
rostedt@goodmis.org, mhiramat@kernel.org,
mathieu.desnoyers@efficios.com, linux-arm-msm@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-block@vger.kernel.org, linux-trace-kernel@vger.kernel.org,
djakov@kernel.org
Subject: Re: [PATCH 4/6] zram: Add QPaCE zcomp backend
Date: Tue, 6 Oct 2026 17:04:23 -0700 [thread overview]
Message-ID: <27eafbb4-22cf-4706-b551-34c0c8d30ae2@oss.qualcomm.com> (raw)
In-Reply-To: <ar4070oH8lRCJMRw@google.com>
On 10/1/2026 3:27 AM, Sergey Senozhatsky wrote:
> On (26/10/01 10:51), Krzysztof Kozlowski wrote:
>> On Wed, Sep 30, 2026 at 07:52:13AM -0700, Georgi Djakov wrote:
>>> Add a zcomp backend for the Qualcomm Page Compression Engine (QPaCE) so
>>> zram can expose qpace-lz4 as a selectable compression algorithm when the
>>> QPaCE driver is available.
>>>
>>> Compress and decompress operations are handled via the QPaCE urgent
>>> synchronous path: each request DMA-maps the source and destination
>>> buffers, issues a blocking hardware command, and returns the result size.
>>>
>>> Signed-off-by: Georgi Djakov <georgi.djakov@oss.qualcomm.com>
>>> ---
>>> drivers/block/zram/Kconfig | 11 +++
>>> drivers/block/zram/Makefile | 1 +
>>> drivers/block/zram/backend_qpace.c | 134 +++++++++++++++++++++++++++++
>>
>> So entire qpace should go here, no? Why did you create this entire layer
>> of indirection, singleton management under drivers/soc?
>
> qpace seems to be standalone/independent arch/soc specific, and can gain
> users outside of zram (fs compression, zswap, etc.). zram's backends
> potentially can disappear all together, if we switch to acomp crypto API.
ACK
Thanks,
Oreoluwa
next prev parent reply other threads:[~2026-10-07 0:04 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-30 14:52 [PATCH 0/6] soc: qcom: Add Qualcomm Page Compression Engine (QPaCE) driver Georgi Djakov
2026-09-30 14:52 ` [PATCH 1/6] dt-bindings: soc: qcom: Add QPaCE binding Georgi Djakov
2026-10-02 6:10 ` Krzysztof Kozlowski
2026-09-30 14:52 ` [PATCH 2/6] soc: qcom: qpace: Add Qualcomm Page Compression Engine driver Georgi Djakov
2026-10-01 8:50 ` Krzysztof Kozlowski
2026-10-06 23:51 ` Oreoluwa Babatunde
2026-10-07 7:51 ` Krzysztof Kozlowski
2026-09-30 14:52 ` [PATCH 3/6] trace: qpace: Add tracepoints for QPaCE operations Georgi Djakov
2026-09-30 14:52 ` [PATCH 4/6] zram: Add QPaCE zcomp backend Georgi Djakov
2026-10-01 5:43 ` Sergey Senozhatsky
2026-10-06 23:53 ` Oreoluwa Babatunde
2026-10-01 8:51 ` Krzysztof Kozlowski
2026-10-01 10:27 ` Sergey Senozhatsky
2026-10-07 0:04 ` Oreoluwa Babatunde [this message]
2026-10-07 0:03 ` Oreoluwa Babatunde
2026-09-30 14:52 ` [PATCH 5/6] soc: qcom: qpace: Add LLCC slice support Georgi Djakov
2026-09-30 14:52 ` [PATCH 6/6] arm64: dts: qcom: hawi: Add QPaCE DT node Georgi Djakov
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