On Wed, Jun 23, 2021 at 04:01:10PM +0800, Kefeng Wang wrote: > > > On 2021/6/23 15:34, Greg KH wrote: > > On Wed, Jun 23, 2021 at 03:25:10PM +0800, Kefeng Wang wrote: > > > > > > > > > On 2021/6/23 15:12, Greg KH wrote: > > > > On Wed, Jun 23, 2021 at 02:59:59PM +0800, Kefeng Wang wrote: > > > > > Hi Greg, > > > > > > > > > > There are two more patches about the ZONE_DMA[32] changes, > > > > > > > > What ZONE_DMA changes? > > > > > > See the subject, [PATCH stable v5.10 0/7] arm64: Default to 32-bit wide > > > ZONE_DMA, We asked the ARM64 ZONE_DMA change backport before, link[1] > > Let's inline the link: > https://lore.kernel.org/lkml/20210303073319.2215839-1-jingxiangfeng@xxxxxxxxxx/ > > The following 7 patches(we asked from link) has merged into lts5.10(tag: > v5.10.22) > > 4d7ed9a49b0c mm: Remove examples from enum zone_type comment > 8eaef922e938 arm64: mm: Set ZONE_DMA size based on early IORT scan > 35ec3d09ff6a arm64: mm: Set ZONE_DMA size based on devicetree's dma-ranges > a9861e7fa4f8 of: unittest: Add test for of_dma_get_max_cpu_address() > 18bf6e998d08 of/address: Introduce of_dma_get_max_cpu_address() > 3fbe62ffbb54 arm64: mm: Move zone_dma_bits initialization into > zone_sizes_init() > 407b173adfac arm64: mm: Move reserve_crashkernel() into mem_init() > > but the patch "arm64: mm: Move reserve_crashkernel() into mem_init()" > has some issue, see the following discussion from Catalin, > > https://lore.kernel.org/linux-devicetree/e60d643e-4879-3fc3-737d-2c145332a6d7@xxxxxxx/ > https://lore.kernel.org/linux-arm-kernel/20201119175556.18681-1-catalin.marinas@xxxxxxx/ > > and yes, we met crash in lts5.10 when kexec boot due to "arm64: mm: Move > reserve_crashkernel() into mem_init()" too, which could be fixed by > commit 2687275a5843 "arm64: Force NO_BLOCK_MAPPINGS if crashkernel > reservation is required", and the commit 791ab8b2e3db "arm64: Ignore any DMA > offsets in the max_zone_phys() calculation" also about DMA set, > So I only asked the two patches(both in v5.11) related ARM64 ZONE_DMA > changes backported into lts5.10. Thanks, all now queued up. greg k-h
