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[82.132.213.26]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-6aa67e0d3c5sm4417232a12.22.2026.09.21.06.44.02 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 21 Sep 2026 06:44:04 -0700 (PDT) Message-ID: Date: Mon, 21 Sep 2026 14:44:00 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 01/16] dma-buf: introduce initial file I/O infrastructure To: Sidong Yang Cc: axboe@kernel.dk, kbusch@kernel.org, hch@lst.de, sagi@grimberg.me, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, linux-fsdevel@vger.kernel.org, io-uring@vger.kernel.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, viro@zeniv.linux.org.uk, brauner@kernel.org, akpm@linux-foundation.org, sumit.semwal@linaro.org, christian.koenig@amd.com, nj.shetty@samsung.com, joshi.k@samsung.com, anuj20.g@samsung.com, tushar.gohad@intel.com, william.power@intel.com, phil.cayton@intel.com, jgg@nvidia.com References: <20260808074245.85757-1-sidong.yang@furiosa.ai> Content-Language: en-US From: Pavel Begunkov In-Reply-To: <20260808074245.85757-1-sidong.yang@furiosa.ai> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 8/8/26 08:42, Sidong Yang wrote: > On 8/1/26 16:46, Pavel Begunkov wrote: >> + if (dma_resv_wait_timeout(dmabuf->resv, DMA_RESV_USAGE_KERNEL, >> + true, 0) < 0) { >> + dma_resv_unlock(dmabuf->resv); >> + goto retry; >> + } > > Shouldn't this be <= 0? With a zero timeout dma_resv_wait_timeout() > returns 0 for a still pending fence; only -ERESTARTSYS is negative. You're right, and this chunk is gone in v6 -- Pavel Begunkov