From: emersonbusson <emersonbusson@gmail.com>
To: linux-block@vger.kernel.org
Cc: axboe@kernel.dk, linux-kernel@vger.kernel.org,
emersonbusson <emersonbusson@gmail.com>
Subject: [RFC PATCH v1 0/2] drivers/block: add RamShared hardware-accelerated VRAM block driver
Date: Fri, 28 Aug 2026 23:13:30 -0300 [thread overview]
Message-ID: <6a924051.e22746c9.8f0fc.bdc2@mx.google.com> (raw)
This patch series introduces the RamShared hardware-accelerated block driver
(drivers/block/ramshared).
RamShared maps discrete GPU video memory (VRAM) apertures over direct PCIe
DMA to provide an ultra-low latency, non-rotational block device with a
synchronous .rw_page swapout path.
Key Design Highlights:
1. blk-mq multi-queue parallel request processing with atomic gendisk allocation.
2. Synchronous .rw_page fast-path in block_device_operations for zero-allocation
swapout under direct memory reclaim pressure.
3. PCIe AER error handling with pci_error_handlers to contain link resets.
4. Comprehensive multi-kernel compatibility across 5.15 LTS through 6.18+.
Testing & Quality Gates:
- checkpatch.pl --strict: 0 errors, 0 warnings, 0 checks.
- sparse semantic address-space analysis: PASS (__iomem annotations verified).
- Multi-tier saturation benchmark: 9,160 MB swap holding 40 continuous cycles
over 30 seconds with 0.00 ms access latency under WSL2/Hyper-V.
Signed-off-by: emersonbusson <emersonbusson@gmail.com>
reply other threads:[~2026-08-29 2:13 UTC|newest]
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