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Thu, 8 Feb 2024 17:07:41 -0500 (EST) Message-ID: <15939d13-76d0-4a47-84c0-1b194530e145@efficios.com> Date: Thu, 8 Feb 2024 17:07:47 -0500 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 03/12] dm: Treat alloc_dax() -EOPNOTSUPP failure as non-fatal Content-Language: en-US To: Dan Williams , Arnd Bergmann , Dave Chinner Cc: linux-kernel@vger.kernel.org, Andrew Morton , Linus Torvalds , Vishal Verma , Dave Jiang , Matthew Wilcox , Russell King , linux-arch@vger.kernel.org, linux-cxl@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-xfs@vger.kernel.org, dm-devel@lists.linux.dev, nvdimm@lists.linux.dev, linux-s390@vger.kernel.org, Alasdair Kergon , Mike Snitzer , Mikulas Patocka References: <20240208184913.484340-1-mathieu.desnoyers@efficios.com> <20240208184913.484340-4-mathieu.desnoyers@efficios.com> <65c548ea54127_afa429463@dwillia2-xfh.jf.intel.com.notmuch> From: Mathieu Desnoyers In-Reply-To: <65c548ea54127_afa429463@dwillia2-xfh.jf.intel.com.notmuch> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 5E82440011 X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: q1ip6apc4ic9tyjen631enibupby383e X-HE-Tag: 1707430062-453396 X-HE-Meta: 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 iJjOsfzR oCm35UWxVASWx/2DHaL6xAVbXepkzDwqP6bCkm4wNaRku9CkmzfqFaWXL3WsgljASA0QS4oo3kVBTSa4D5s1T1z0tJ3RFeBokHBQemmqEg8jb/C+XhqOu3YePhrkWxjYBdzDSUD3hhKf0FqWjXoWcs3FEXskYL3oPm3dSE2tLKqJGJjBjEfZNbTc3nldk1RjQwBADgEPP6yK1csDGXAHz0zJfuQTAHTiM/zs/XGtO+c6y2YNOhI5k7/heh/0O2lamxHTPuBwQ7PjXi2vOOdE2/+lJXtFgzjacETzNOP9sS5U5yjkinp833/5DbLGr+3eqBA3cB2m7PQPmP/yEofkeiAg3Mg== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 2024-02-08 16:34, Dan Williams wrote: [...] > Similar feedback as the pmem change, lets not propagate the mistake that > alloc_dax() could return NULL, none of the callers of alloc_dax() > properly handled NULL and it was just luck that none of the use cases > tried to use alloc_dax() in the CONFIG_DAX=n case. Done. Thanks, Mathieu -- Mathieu Desnoyers EfficiOS Inc. https://www.efficios.com