Date: Tue, 14 Oct 2025 23:25:16 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 290237] nvme panic during stress2 testing Message-ID: <bug-290237-227-SBnra9ylns@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-290237-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=290237 --- Comment #1 from Jason A. Harmening <jah@FreeBSD.org> --- If nvme can't tolerate EINPROGRESS from bus_dmamap_load_mem (IOW if it really need to pass BUS_DMA_NOWAIT), then I suspect some failure would be expected in this scenario. Given the memory pressure these stress2 tests place on the system, if I had to guess I would say that busdma probably returned EINPROGRESS here not because it failed to allocate mapping space in the IOMMU GAS, but rather because one of the M_NOWAIT mallocs (e.g. the page array malloc in iommu_bus_dmamap_load_buffer()) failed. There doesn't seem to be any provision for avoiding these allocations or e.g. using M_USE_RESERVE if the IOMMU mapping in question happens to be necessary for the paging path. -- You are receiving this mail because: You are the assignee for the bug.home | help
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