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[2a01:cb00:21e:c000:2e23:edbe:c21b:e73]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3d701622b92sm16687155f8f.58.2025.09.04.07.49.16 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 04 Sep 2025 07:49:16 -0700 (PDT) Mime-Version: 1.0 Date: Thu, 04 Sep 2025 16:49:15 +0200 Message-Id: Subject: Re: Error with --no-huge when compiled with -fsanitize=address from gcc 15 From: "Robin Jarry" To: "Burakov, Anatoly" , User-Agent: aerc/0.20.1-134-gd0eef4107798 References: <9d2e0536-98af-4532-aa57-dd1605d6e070@intel.com> In-Reply-To: <9d2e0536-98af-4532-aa57-dd1605d6e070@intel.com> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: _vx4Kirf-dzyp6ZtxaQwrtQrHaolCJikLFEevj5HX7Y_1756997358 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Hey Anatoly, Burakov, Anatoly, Sep 04, 2025 at 16:35: > I have been trying to reproduce this but I'm unable to. I run some old=20 > CentOS so I built GCC15 manually and tried reproducing with that. The=20 > version I'm using is 15.2, could you please retest with latest GCC15 and= =20 > see if it was fixed? I am running on Fedora 42 that has GCC 15.2.1 and the problem persists. > (if not, I'll try to get a more recent distro and reproduce again) > > The DMA mask checking you're referring to is there for cases where e.g.= =20 > in a VM the emulated IOMMU will not have full address width (39 bits was= =20 > common at the time), and thus we couldn't use the full VA space for IOVA= =20 > addressing, and had to resort to using real physical addresses (because= =20 > kernel ensure those are to be within support range of IOMMU). Were you=20 > running this test in a VM, by any chance? No I am running on a physical machine. I tested again without --no-huge and 2M/1G huge pages, and the issue persists as well. I tried both as root, and as a regular user. --=20 Robin > Formatted to fit your screen.