Bug 28494 - [ANCK-6.6.102-5.2.1_rc1][riscv64]kernel-selftests.dmabuf-heaps.dmabuf-heap 未开启CONFIG_DMABUF_HEAPS 导致测试提示/dev/dma_heap不存在
Summary: [ANCK-6.6.102-5.2.1_rc1][riscv64]kernel-selftests.dmabuf-heaps.dmabuf-heap 未开...
Status: CONFIRMED
Alias: None
Product: Antest
Classification: Infrastructures
Component: 测试用例 (show other bugs) 测试用例
Version: unspecified
Hardware: All Linux
: P3-Medium S3-normal
Target Milestone: ---
Assignee: chenzhuo
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Reported: 2025-12-24 16:25 UTC by stt02296199
Modified: 2025-12-29 13:40 UTC (History)
1 user (show)

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Comment 1 stt02296199 alibaba_cloud_group 2025-12-24 17:11:58 UTC 
(In reply to stt02296199 from comment #0)
> [问题描述]
> kernel-selftests.dmabuf-heaps.dmabuf-heap 测试提示/dev/dma_heap不存在
> # selftests: dmabuf-heaps: dmabuf-heap
# No /dev/dma_heap directory?
not ok 1 selftests: dmabuf-heaps: dmabuf-heap # exit=255
> [重现环境]：
> [root@localhost netfilter]# uname -r
> 6.6.102-5.2.1_rc1.an23.riscv64
> [root@localhost netfilter]# cat /boot/config-6.6.102-5.2.1_rc1.an23.riscv64
> |grep -i dma|grep -i heap
> # CONFIG_DMABUF_HEAPS is not set
> [root@localhost netfilter]# lscpu
> Architecture:          riscv64
>   Byte Order:          Little Endian
> CPU(s):                64
>   On-line CPU(s) list: 0-63
> NUMA:
>   NUMA node(s):        4
>   NUMA node0 CPU(s):   0-7,16-23
>   NUMA node1 CPU(s):   8-15,24-31
>   NUMA node2 CPU(s):   32-39,48-55
>   NUMA node3 CPU(s):   40-47,56-63
> [root@localhost netfilter]# lsblk
> NAME        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
> nvme0n1     259:0    0 953.9G  0 disk
> ├─nvme0n1p1 259:1    0 121.9M  0 part /boot/efi
> ├─nvme0n1p2 259:2    0   488M  0 part /boot
> ├─nvme0n1p3 259:3    0 143.1G  0 part /
> ├─nvme0n1p4 259:4    0     1K  0 part
> ├─nvme0n1p5 259:5    0 286.1G  0 part /fs/nvme0n1p5
> └─nvme0n1p6 259:6    0 286.1G  0 part
> [root@localhost netfilter]# free -g
>                total        used        free      shared  buff/cache  
> available
> Mem:              61           2           0           0          59        
> 59
> Swap:              0           0           0
> [root@localhost netfilter]# cat /proc/cmdline
> root=UUID=e297bfa3-2c55-44f8-90cb-ae8eb642d188 ro console=ttyS0,115200
> root=LABEL=ROOT rootfstype=ext4 rootwait rw earlycon selinux=0
> LANG=en_US.UTF-8 nvme.use_threaded_interrupts=1 nvme_core.io_timeout=3000
> audit=0 per_numa_node_futex=disable
> [重现步骤]
> 1.获取内核对应src.rpm包
> (KERNEL_SRC_RPM=http://8.131.87.1/kojifiles/repos/dist-an23.3-riscv64-gcc14-
> build/latest/riscv64/toplink/work/tasks/5939/1035939/kernel-6.6.102-5.2.
> 1_rc1.an23.src.rpm)
> rpm -ivh xxx.src.rpm 默认安装到/root下
> yum install yum-utils
> yum-builddep -y /root/rpmbuild/SPECS/kernel.spec 自动安装前置依赖包 需要yum-utils
> rpmbuild -bp /root/rpmbuild/SPECS/kernel.spec # 这个步骤会打相关的patch，
> 解压缩tar包，生成BUILD目录
> cd /root/rpmbuild/BUILD/kernel-*/linux-*/tools/testing/selftests/dmabuf-heaps
> make
> ./dmabuf-heap
> 
> [实际结果]
> 测试fail
> [期望结果]
> 测试pass
> [原因分析]
> 初步分析是 CONFIG_DMABUF_HEAPS 未开启导致  请确认是否需要开启 
> cat /boot/config-6.6.102-5.2.1_rc1.an23.riscv64 |grep -i dma|grep -i heap
> # CONFIG_DMABUF_HEAPS is not set
Comment 2 chenzhuo alibaba_cloud_group 2025-12-25 11:21:11 UTC 
config未打开，符合预期