Re: [dpdk-dev] [PATCH v4 0/4] compatibility fallback and replacement of kernel function invoking

[Thomas Monjalon <thomas.monjalon@6wind.com>]

> The related kernel function is:
> - pci_num_vf, it is introduced from upstream linux-2.6.34. For RHEL-based
> kernel, it is defined from RHEL5.9.
> 
> - kstrtoul, this function is united kernel API to replace strict_strtoul in
> the furture. It is introduced from linux-2.6.39. For RHEL6, it is defined
> from RHEL6.4.
> 
> This patchset do some compatiblity work for these two functions, and
> replace strict_strtoul which is depleted from linux-3.18.
> 
> Some test results for dpdk-1.8.0-rc3 with this patchset:
> 1. In RHEL7 GA: Build success after specify -mssse3 to CFLAGS,
> ```
> CC ixgbe_rxtx_vec.o
> In file included from /root/dpdk-source/lib/librte_pmd_ixgbe/ixgbe_rxtx_vec.c:41:0:
> /usr/lib/gcc/x86_64-redhat-linux/4.8.2/include/tmmintrin.h:31:3: error: #error "SSSE3 instruction set not enabled"
> # error "SSSE3 instruction set not enabled"
> ```
>   - for igb_uio, pass
>   - for kni, pass
>   - for xen_dom0, pass
> 
> 
> 2. In RHEL6.5 : Build fails for kni, and xen_dom0:
>   - for igb_uio: pass
>   - for kni: fail, the log is:
> ```
> CC [M] /root/dpdk-source/build/build/lib/librte_eal/linuxapp/kni/kni_vhost.o
> /root/dpdk-source/build/build/lib/librte_eal/linuxapp/kni/kni_vhost.c: In function ‘kni_sock_poll’:
> /root/dpdk-source/build/build/lib/librte_eal/linuxapp/kni/kni_vhost.c:222: error: ‘struct socket’ has no member named ‘wq’
> /root/dpdk-source/build/build/lib/librte_eal/linuxapp/kni/kni_vhost.c: In function ‘kni_chk_vhost_rx’:
> /root/dpdk-source/build/build/lib/librte_eal/linuxapp/kni/kni_vhost.c:313: error: implicit declaration of function ‘sk_sleep’
> cc1: warnings being treated as errors
> /root/dpdk-source/build/build/lib/librte_eal/linuxapp/kni/kni_vhost.c:313: error: passing argument 1 of ‘__wake_up’ makes pointer from integer without a cast
> include/linux/wait.h:146: note: expected ‘struct wait_queue_head_t *’ but argument is of type ‘int’
> /root/dpdk-source/build/build/lib/librte_eal/linuxapp/kni/kni_vhost.c: In function ‘kni_sk_write_space’:
> /root/dpdk-source/build/build/lib/librte_eal/linuxapp/kni/kni_vhost.c:580: error: assignment makes pointer from integer without a cast
> make[8]: *** [/root/dpdk-source/build/build/lib/librte_eal/linuxapp/kni/kni_vhost.o] Error 1
> ```

Do you plan to work on a fix for KNI on RHEL 6.5?

>   - for xen_dom0: fail, seems xen is not offical supported in RHEL6.
> 
> v4:
>   Indent for patches.
>   Include compat.h for kni_vhost.c
> 
> v3:
>   Adjust pci_num_vf() introduced RHEL version number.
>   Seperate "replace strict_strtoul with kstrtoul" into 3 patches for igb_uio,
> kni, and xen_dom0. Add compat.h in kni and xen_dom0 for compatible with
> older kernels.
> 
> v2:
>   Merge these two patch in one patchset.
>   Compatible with old kernel for kstrtoul.
>   Compatible with RHEL6 for pci_num_vf.
> 
> Jincheng Miao (4):
>   igb_uio: compatible with upstream longterm kernel and RHEL
>   igb_uio: replace strict_strtoul with kstrtoul
>   kni: replace strict_strtoul with kstrtoul
>   xen_dom0: replace strict_strtoul with kstrtoul

Acked-by: Thomas Monjalon <thomas.monjalon@6wind.com>

Applied

Thanks
-- 
Thomas