WebLKML Archive on lore.kernel.org help / color / mirror / Atom feed From: Dongli Zhang To: [email protected], [email protected] Cc: [email protected], [email protected], [email protected], [email protected], [email protected], … WebApr 10, 2015 · [ 2.264053] Kernel panic - not syncing: Can not allocate SWIOTLB buffer earlier and can't now provide you with the DMA bounce buffer [ 2.266302] CPU: 2 PID: 102 Comm: khubd Tainted: G W ----- 3.10.0-237.el7.x86_64 #1 [ 2.266302] Hardware name: Red Hat KVM, BIOS seabios-1.7.5-8.el7 04/01/2014 [ 2.266302] ffffffff8185b630 …
[RFC] swiotlb: Add a new cc-swiotlb implementation for …
WebDec 4, 2024 · [ 931.922004] Kernel panic - not syncing: Fatal exception [ 931.933703] Kernel Offset: disabled (XEN) [2024-02-13 03:50:30] Domain 0 crashed: Executing kexec image on cpu1 ... [ 84.674811] ---[ end Kernel panic - not syncing: Can not allocate SWIOTLB buffer earlier and can't now provide you with the DMA bounce buffer http://xillybus.com/tutorials/iommu-swiotlb-linux north bersted sussex
[PATCH 1/1] swiotlb: save io_tlb_used to local variable before …
WebThe legacy swiotlb cannot efficiently support larger swiotlb buffers. In the worst case, the current implementation requires a full scan of the entire swiotlb buffer, which can cause severe performance hits. Instead of keeping "infecting" the legacy swiotlb code with CoCo logic, this patch tries to introduce a new cc-swiotlb for Confidential VMs. WebAug 20, 2024 · - the "swiotlb=" is configured to allocate extra buffer, and - the SWIOTLB_EXTRA is set in the flag (this is to make sure arch(s) other than x86/sev/xen will not enable it until it is fully tested by each arch, e.g., mips/powerpc). Currently it is enabled for x86 and xen. 3. During swiotlb map, whether zone[0] (32-bit) or zone[1] (64-bit ... WebAllocating DMA Buffers on 64-bit Platforms NVIDIA GPUs have limits on how much physical memory they can address. This directly impacts DMA buffers, as a DMA buffer allocated in physical memory that is unaddressable by the NVIDIA GPU cannot be used (or may be truncated, resulting in bad memory accesses). north bersted west sussex