On Tue, May 03, 2016 at 02:44:49PM +0000, Shardar Mohammed wrote: > Thanks for review. Please find my comments inline. > > > On 03/05/16 13:14, Shardar Shariff Md wrote: > > > During DMA client(UART) stress testing, observed below crash: > > > > > > [ 167.041591] Unable to handle kernel paging request at virtual > > > address 00100108 [ 167.048818] pgd = ffffffc0de7ee000 [ 167.052222] > > > [00100108] *pgd=0000000000000000 [ 167.056513] Internal error: Oops: > > > 96000045 [#1] PREEMPT SMP [ 167.084048] Modules linked in: > > > [ 167.087126] CPU: 0 PID: 1786 Comm: uarttest Tainted: G W 3.10.33- > > gb76f6f9 #5 > > > [ 167.095040] task: ffffffc0a5ba6ac0 ti: ffffffc094380000 task.ti: > > > ffffffc094380000 [ 167.102529] PC is at tegra_dma_tasklet+0x50/0xf4 [ > > > 167.107148] LR is at tegra_dma_tasklet+0xc0/0xf4 [ 167.111767] pc : > > > [<ffffffc00044acc8>] lr : [<ffffffc00044ad38>] pstate: 800001c5 [ > > > 167.119155] sp : ffffffc094383a60 [ 167.122469] x29: ffffffc094383a60 > > > x28: 0000000000000000 > > > > This appears to be from quite an old kernel. I assume that this is still valid for > > the latest mainline? > [Shardar] Yes. Please get into the habit of testing your patches against upstream kernels. Merely testing that it applies is not enough. All patches that are submitted for mainline inclusion must be *runtime* tested against a mainline kernel. Also it would be nice if you could offer steps on how to reproduce, that way we can extend our testing to make sure we never regress. Thierry
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