On Tue, 2019-04-09 at 18:25 +0200, Daniel Mack wrote: > On 8/4/2019 8:51 PM, Trond Myklebust wrote: > > On Mon, 2019-04-08 at 19:01 +0200, Daniel Mack wrote: > > > Hi, > > > > > > I'm seeing the Oops below when trying to boot 5.1.0-rc4 on an ARM > > > PXA3xx > > > platform. v5.0 did not show this effect with the same cmdline. > > > > > Please do bisect if that is at all practical. I'm having trouble > > interpreting this Oops. > > Here you go: > > 009a82f6437490c262584d65a14094a818bcb747 is the first bad commit > commit 009a82f6437490c262584d65a14094a818bcb747 > Author: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx> > Date: Sat Mar 9 12:07:17 2019 -0500 > > SUNRPC: Micro-optimise when the task is known not to be sleeping > > In cases where we know the task is not sleeping, try to optimise > away the indirect call to task->tk_action() by replacing it with > a direct call. > Only change tail calls, to allow gcc to perform tail call > elimination. Ah... It looks like we explicitly turn off tail call optimisation in some ARM configs, so this might be a stack overflow. Does your config file have THUMB2_AVOID_R_ARM_THM_JUMP11 set? -- Trond Myklebust Linux NFS client maintainer, Hammerspace trond.myklebust@xxxxxxxxxxxxxxx
