Hello, in https://bugs.debian.org/1015871 the Debian kernel team got a request to enable PCI_P2PDMA. Given the description of the feature and also the "If unsure, say N." I wonder if you consider it safe to enable this option. Assuming this option isn't completely free of security concerns, a kernel option to explicitly enable would be nice for a distro kernel. This way the option could be enabled (but dormant and so safe) and users who want to benefit from it despite the concerns can still do so. Some side information: - According to Emanuele Rocca this option is enabled in Fedora Server 38 and openSUSE Tumbleweed - I already asked in #linux-pci for feedback, Krzysztof Wilczyński recommended there to bring this topic forward via mail and pointed out a (paywalled) ACM paper about this topic (https://dl.acm.org/doi/10.1145/3409963.3410491). Best regards Uwe -- Pengutronix e.K. | Uwe Kleine-König | Industrial Linux Solutions | https://www.pengutronix.de/ |
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