Hi Daniel, On Tue, 2019-04-09 at 19:54 +0200, Daniel Mack wrote: > On 9/4/2019 6:55 PM, Trond Myklebust wrote: > > 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? > > Nope. I don't even have THUMB2_KERNEL. > > In the meantime, I tried to trace that with some printks, but the bug > appears evasive, and the backtrace changes as soon as I modify the > timing. Hmm. > > Happy to test patches if you have any idea. > Could you please try pulling the 'testing' branch from http://git.linux-nfs.org/?p=trondmy/linux-nfs.git;a=shortlog;h=refs/heads/testing i.e. 'git pull git://git.linux-nfs.org/projects/trondmy/linux-nfs.git testing' to see if that suffices to fix the issue you're reporting? Thanks Trond -- Trond Myklebust Linux NFS client maintainer, Hammerspace trond.myklebust@xxxxxxxxxxxxxxx
