On 28-09-2017 18:35, Raj, Ashok wrote: > Thanks for trying that Harsh. > > sp_off turns of super page support. Which this mode, do you still see offsets greater than 4k? Yes, offset greater than 4k is still there. Refer below. [56732.774872] offset 4110 len 76 dma addr 3a531200e dma len 76 [56732.804187] offset 4110 len 84 dma addr 3a63b200e dma len 84 [56732.805104] offset 4110 len 68 dma addr 3a531200e dma len 68 [56732.806870] offset 4110 len 56 dma addr 3a531200e dma len 56 [56732.808987] offset 4110 len 56 dma addr 3a531200e dma len 56 [56732.811215] offset 4110 len 56 dma addr 3a531200e dma len 56 [56732.813155] offset 4110 len 56 dma addr 3a531200e dma len 56 [56732.814823] offset 4110 len 56 dma addr 3a531200e dma len 56 [56732.816481] offset 4110 len 56 dma addr 3a531200e dma len 56 [56732.818159] offset 4110 len 56 dma addr 3a531200e dma len 56 [56732.819712] offset 4110 len 56 dma addr 3a531200e dma len 56 [56732.821629] offset 4110 len 56 dma addr 3a531200e dma len 56 [root@heptagon linux_t4_build]# [root@heptagon linux_t4_build]# [root@heptagon linux_t4_build]# cat /proc/cmdline BOOT_IMAGE=/vmlinuz-4.9.51 root=UUID=ccbb7f18-b3f0-43df-89de-07521e9c02fe ro intel_iommu=sp_off crashkernel=auto rhgb quiet rhgb quiet console=ttyS0,115200, console=tty0 LANG=en_US.UTF-8 > > On Thu, Sep 28, 2017 at 07:08:21PM +0530, Harsh Jain wrote: >> >> Today I tried with "Intel_iommu=sp_off" boot option. Traffic runs without any error for more than 1 hrs. What magic this option did? :) > Cheers, > Ashok
