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Thu, 09 Apr 2026 06:30:36 -0700 (PDT) Received: from fedora.redhat.com ([209.132.188.88]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-c76c657dfb7sm21021166a12.24.2026.04.09.06.30.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 09 Apr 2026 06:30:35 -0700 (PDT) From: Ming Lei To: Jens Axboe , linux-block@vger.kernel.org Cc: Caleb Sander Mateos , Ming Lei Subject: [PATCH 0/7] ublk: followup fixes for SHMEM_ZC Date: Thu, 9 Apr 2026 21:30:12 +0800 Message-ID: <20260409133020.3780098-1-tom.leiming@gmail.com> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Hello Jens, Followup fixes for the SHMEM_ZC (shared memory zero copy) patch series, addressing review feedback from Caleb Sander Mateos. - Widen ublk_shmem_buf_reg.len to __u64 so 4GB buffers can be registered (the __u32 field overflowed to 0 for exactly 4GB) - Verify all pages in multi-page bvecs fall within the registered maple tree range, removing base_pfn from ublk_buf_range since mas.index provides the range start PFN - Simplify the PFN range coalescing loop in __ublk_ctrl_reg_buf - Replace xarray with IDA for buffer index allocation, removing the unnecessary struct ublk_buf - Allow buffer registration before device is started by taking ub->mutex before freezing the queue (same ordering as ublk_stop_dev_unlocked) - Address documentation review comments - Update MAINTAINERS email Thanks, Ming Lei (7): ublk: widen ublk_shmem_buf_reg.len to __u64 for 4GB buffer support ublk: verify all pages in multi-page bvec fall within registered range ublk: simplify PFN range loop in __ublk_ctrl_reg_buf ublk: replace xarray with IDA for shmem buffer index allocation ublk: allow buffer registration before device is started Documentation: ublk: address review comments for SHMEM_ZC docs MAINTAINERS: update ublk driver maintainer email Documentation/block/ublk.rst | 10 +- MAINTAINERS | 2 +- drivers/block/ublk_drv.c | 201 ++++++++++++++++------------------ include/uapi/linux/ublk_cmd.h | 3 +- 4 files changed, 101 insertions(+), 115 deletions(-) -- 2.53.0